KR101589474B1 - Apparatus and method for packet transport service based on MPLS-TP network - Google Patents

Abstract

The present invention relates to a packet processing apparatus and method for ensuring end-to-end quality of service through an MPLS-TP (Transport Profile) network and for transmitting a reliable packet.
A packet processing apparatus for transmitting a packet input from a plurality of networks via an LSP (Label Switched Path) located in an MPLS-TP network according to the present invention, the apparatus comprising: If the packet inputted from the port information of the field information of the packet is a control packet or a general packet, and if the input packet is a general packet, whether the general packet is a received packet or a transmitted packet, The LSP condition information or the address information from the field information of the general packet, referring to the acquired LSP condition information or the address information, and transmits the packet inputted as the service type determined from the packet classifying unit and the inputted packet And a packet processing unit for updating the header or address information of the header. In accordance with this aspect of the present invention, there is provided a method for transmitting a packet, which includes port information, C-VID, S-VID, source MAC address and E-Type information included in field information of a packet input from a plurality of local networks, a provider bridge network and an MPLS network , And MPLS label information to obtain LSP condition information including PTL index information for extracting LSP information.

Description

[0001] The present invention relates to a packet processing apparatus and method for a packet transmission service in an MPLS-TP network,

The present invention relates to a packet processing apparatus and method for ensuring end-to-end quality of service through an MPLS-TP (Transport Profile) network and for transmitting a reliable packet.

In general, the transmission service was to provide a point-to-point connection service in a time division multiplexing manner through a SONET (Synchronous Optical Network) or a SDH (Synchronous Digital Hierarchy). However, such a transmission service is not flexible enough to accommodate a new business model due to the burden of the capacity increase due to the limited speed. On the other hand, the IP-based transmission service is less expensive than the SONET (Synchronous Optical Network) or SDH (Synchronous Digital Hierarchy) network, and the burden on the cost is relatively low. On the other hand, the quality of service (QoS) There is a problem that strict SLA (Service-level agreements) must be applied.

Therefore, the Internet engineering task force (IETF) uses a standard data link layer such as self-defined MPLS-TP (Transport Profile), IEEE802.1ah (PBB) and IEEE802.1ag (PBB-TE) A scheme for a transmission service that provides inter-QoS has been sought. Meanwhile, the MPLS-TP is a name changed from the IETF to the T-MPLS standardization work which has been conducted by the International Telecommunication Union Telecommunication Standardization Sector (ITU-T). The MPLS-TP is standardized by applying IETF MPLS forwarding, OAM, survivability, network management, and control plane protocol by applying the transport network requirements to the IETF MPLS based on the existing MPLS architecture and the PWE3 architecture. In addition, MPLS-TP proposes additional features based on new transport requirements and elements that meet the transport requirements in pre-existing MPLS prior to RFC5654. In particular, Transport-like OAM, Transport -like resilience, and transport-like operation.

Accordingly, in the present invention, when an MPLS-TP network is interworked with a customer network, a provider bridge network, or an MPLS network and a PWE3 service is provided, services are generated and managed using data link layer information QoS management, statistics management, connection admission control, and system operation and management by performing packet-based processing for each service.

Furthermore, the present invention aims at providing a packet processing function in the same manner without distinguishing between an Ingress PE, a Transit P node, and an Egress PE node.

Furthermore, the present invention aims to provide an MPLS-TP layer stack and a stacking function without limit to the number of label stacks for eliminating restrictions on the hierarchical structure of the network configuration.

The above-described technical problem is achieved by the characteristic aspects of the present invention described later. A packet processing apparatus for transmitting a packet input from a plurality of networks via an LSP (Label Switched Path) located in an MPLS-TP network according to the present invention, the packet processing apparatus comprising: If the input packet is a general packet, whether the general packet is a received packet or a transmitted packet is classified as a control packet or a general packet, And receives the LSP condition information or the address information from the field information of the general packet, refers to the obtained LSP condition information or address information, and transmits the packet inputted in the service type determined from the packet classifying section and the header or address And a packet processing unit for updating information.

According to a further aspect of the present invention, if the input packet is a control packet, the packet classification unit transmits the control packet to the upper control channel through the CPU interface. If the input packet is a received packet, A receiving packet processing unit for generating an associated service type and obtaining LSP condition information from a table related to the generated service type; and if the input packet is a transmission packet, if the destination of the transmission packet is a PW type, And a transmission packet processing unit for acquiring LSP transmission information or address information for transmission to the LSP.

According to a further aspect of the present invention, the received packet processing unit generates a service type determined by combining port information, C-VID, and S-VID information included in field information of a received packet according to a service type determined from a packet classification unit, And a PW FEC lookup unit for obtaining PTL index information and tag control information for extracting LSP information from the PW FEC table unit.

According to a further aspect of the present invention, the received packet processing unit generates a service type determined by combining port information, C-VID, S-VID, source MAC address, and E-Type information included in field information of a received packet, An IP FEC lookup section for obtaining PTL index information for extracting LSP information from the FEC table section, a control flag for controlling ELSP, and ELSP label information.

According to a further aspect of the present invention, the received packet processing unit generates the service type determined using the port information and the MPLS label information included in the field information of the received packet, and generates PTL index information for extracting LSP information from the MPLS ILM table unit And an MPLS label lookup unit for obtaining SDT, new tag, MPLS control information, and tag control information for other control.

In accordance with this aspect of the present invention, the received packet processing unit includes port information, C-VID, S-VID, source MAC address, and port information included in field information of packets input from a plurality of local networks, a provider bridge network, , E-Type information, and MPLS label information to obtain LSP condition information including PTL index information for extracting LSP information.

According to a further aspect of the present invention, the received packet processing unit determines the service type generated in the corresponding lookup unit according to whether the information obtained by at least one of the lookup units matches, and extracts the LSP from the index table unit A first NHLFE lookup unit for acquiring tag control information for a switch fabric and a transmission / reception output port, a tag value, a TM queue index, a TB profile, a packet counter, and other controls for transmitting a received packet through the MPLS- A second NHLFE lookup section for obtaining SLSP labels related to the TP layer, a plurality of TLSP labels, EXP, Stack, TTL, Next PTL index information, D-MAC or M-ID and label control information.

According to a further aspect of the present invention, the packet processing unit includes a PTL lookup unit for obtaining token bucket index and token bucket profile information for policing or shaping to guarantee QoS from the PTL table unit, a SLSP label obtained from the second NHLFE lookup unit And a hash / TB counter lookup unit for determining the transmission of the received packet to the temporary service type previously stored in the generated service type or the hash table according to whether the SLSP label stored in the service table unit matches the hash / If the two SLSP labels match, the service type stored in the hash table portion is updated to the created service type. If the SLSP label is transmitted to the generated service type, the information obtained from the PTL table portion is run to add a new hash entry, The table portion is updated, and the required bandwidth of the service type is updated in the TB counter table In that in accordance with the stored exceeds the threshold value, as through the metering collar the marked packet in order to determine whether or not to send the received packet.

According to this aspect of the present invention, it is possible to determine whether to transmit the received packet to a service type generated in the lookup section of at least one of the PW FEC lookup section, the IP FEC lookup section and the MPLS label lookup section, It is possible to determine whether to transmit a received packet to the corresponding service type according to a CIR-committed information rate (CIR-committed information rate).

According to a further aspect of the present invention, the packet processing unit includes a traffic management unit for terminating the transmission of the received packet according to the determination of whether or not the received packet is transmitted from the hash / TB counter lookup unit or according to the QoS profile set through the CPU interface from the upper control channel A header generator for generating three internal headers based on the information obtained from the first and second NHLFE lookups, and a header generator for generating three internal headers based on the TLSP and SLSP labels associated with the MPLS-TP layer to transmit the received packet to the destination network through the LSP. Encapsulation via the push / swap or pop function, encapsulation of three internal headers obtained from the decapsulation and header generation unit, and VLAN tag information obtained from the first NHLFE lookup unit to the destination network, And a header processing unit for performing tag insertion, removal, or modification of the field information.

According to a further aspect of the present invention, the packet processing unit subtracts the TTL when the MPLS-TP layer related top level label (TLSP or SLSP) is swapped, performs a TTL copy according to the TTL processing mode if the MPLS- Push), the TTL control unit initializes the TTL from the TTL value acquired from the second NHLFE lookup unit. The header processing unit receives the MPLS-TTL from the TTL control unit according to a factor value applied through TTL subtraction, TTL copy, Updates the TTL field of the highest layer label associated with the TP layer and inserts, changes or removes the Internal header generated from the header generator in the header of the received packet according to the header condition information stored in the packet memory.

According to a further aspect of the present invention, the packet processing unit includes an OAM packet processing unit for checking whether the path of the packet classified by using the SLSP OAM, the TLSP OAM, and the PW OAM stored in the OAM table unit is abnormal, If the input path is checked to be abnormal, the path protection switching unit performs protection switching with a path related to a path through which the packet is input.

According to this aspect of the present invention, the header, MPLS-TP label, and L2 VLAN tag of the field information included in the received packet can be inserted, removed, or changed. It is possible to perform protection switching to this inputtable path.

According to a further aspect of the present invention, if the transmission packet is not an MPLS transmission packet including the Internal header, the transmission packet processing unit updates the source MAC address from the output port included in the field information of the transmission packet, A port lookup section for obtaining a source MAC address, a TM queue index and a packet counter index information of an output port, and an MPLS transmission packet including an internal header, an output port included in the field information of the MPLS transmission packet and an MPLS- And a port label lookup unit for obtaining the source MAC address, the TM queue index, and the packet counter index information of the output port from the port label table unit.

According to a further aspect of the present invention, the transmission packet processing unit determines whether to transmit the transmission packet by multicast or unicast through the M-ID information and the flag of at least one label included in the extracted field information, (D-MAC) address, PTL index, MPLS-TP layer label, EXPs, STACKs, TTLs, tag value, TM queue index, counter index, control for sending packet to LSP set in MPLS-TP network And a multicast lookup section for obtaining information.

According to a further aspect of the present invention, the transmission packet processing unit determines whether to transmit the transmission packet by multicast or unicast through the M-ID information and the flag of at least one label included in the extracted field information, A PW multicast lookup unit for acquiring an SDT, a PTL index, a tag value, a TM queue index and control information for transmitting the transmission packet to an LSP set in the MPLS-TP network through a payload; And a PW decapsulation unit for removing the PW decapsulation unit.

According to this aspect of the present invention, the transmission packet processing unit can determine whether to transmit the transmission packet by multicast or unicast through the output port or M-ID information or M-ID and flag information included in the transmission packet have.

Include

In the present invention, when an MPLS-TP network is interworked with a customer network, a provider bridge network, or an MPLS network and a PWE3 service is provided, service creation and management are performed using data link layer information, , Route management and protection switching for each service, QoS, statistics management, connection admission control, and system operation and management.

In addition, through the present invention, it is possible to provide a packet processing function in the same manner without discrimination between an ingress PE node, a transit P node, and an egress PE node.

In addition, through the present invention, it is possible to provide an unlimited stacking function to the MPLS-TP layer stack and the label stack without limitation to the hierarchical structure of the network configuration.

1 is a diagram illustrating a structure of a packet transmission system including a packet processing apparatus according to an embodiment of the present invention;
FIG. 2 is a flowchart of a method of transmitting a packet input from an external network through an LSP in a packet processing apparatus located in an MPLS-TP network according to an embodiment of the present invention;
3 is a flowchart of a method for acquiring LSP condition information for extracting LSP information in a packet processing apparatus according to an embodiment of the present invention;
4 is a flowchart illustrating a method of transmitting a transmission packet in a packet processing apparatus located in an MPLS-TP network according to an embodiment of the present invention.
5 is a block diagram of a packet processing apparatus for providing a packet transmission service according to an embodiment of the present invention;
FIG. 6 is an exemplary view illustrating a service type provided according to the MPLS-TP standard in the packet processing apparatus according to an embodiment of the present invention;
7 is an exemplary diagram illustrating a control signal to be controlled by the control management unit of the packet processing apparatus according to an embodiment of the present invention;
8 is an exemplary diagram illustrating a location of an internal header included in field information of a transmission packet according to an exemplary embodiment of the present invention.
FIG. 9A is an exemplary diagram illustrating a packet transmission service through an LSP established in an MPLS-TP network according to an embodiment of the present invention. FIG.
9B illustrates an example of performing a packet transmission service through another LSP set in an MPLS-TP network according to an embodiment of the present invention.
10A is a diagram illustrating an example of performing a packet transmission service through an LSP established in an MPLS-TP network according to an embodiment of the present invention.
FIG. 10B illustrates an example of performing a packet transmission service through another LSP set in an MPLS-TP network according to an embodiment of the present invention.
11A is a diagram illustrating an example of performing a packet transmission service through an LSP established in an MPLS-TP network according to an embodiment of the present invention.
FIG. 11B illustrates an example of performing a packet transmission service through another LSP set in an MPLS-TP network according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The foregoing and further aspects of the present invention will become more apparent from the following detailed description of preferred embodiments with reference to the accompanying drawings. Hereinafter, the present invention will be described in detail in order that those skilled in the art can easily understand and reproduce the present invention through these embodiments.

1 is an exemplary diagram illustrating a structure of a packet transmission system including a packet processing apparatus according to an embodiment of the present invention.

1, the packet transmission system includes a Multi Protocol Label Switching Transport Protocol (MPLS-TP) network 10, a plurality of local networks 20, 30 and 40, a provider bridge networks 50 and 60, And delivers the packet to a plurality of users (1-5) through the MPLS network (70,80). That is, a plurality of packet processing apparatuses 100a to 100h located in the MPLS-TP network 10 are physically connected to a plurality of users 1 to 5 and are connected to the local network 20, 30, And transmits a packet input from a plurality of access switches located in the bridge networks 50 and 60 or a plurality of access switches located in the MPLS networks 70 and 80. The plurality of packet processing apparatuses 100a to 100h may be connected to a plurality of local networks 20, 30, 40 or a provider bridge network 100 through a LSP (Label Switched Path) (21, 22, 51, 52), which are physically connected to a plurality of users (1 to 5) according to the service type, through an MPLS network (70, 80) Lt; / RTI >

In this way, the packet processing apparatuses 100a to 100h located in the MPLS-TP network 10 transmit packets input from at least one of the plurality of local networks, the provider bridge networks, and the MPLS networks via the LSP Is as follows. First, at least one of the packet processing apparatuses 100a to 100h located in the MPLS-TP network 10 is connected to at least one of the plurality of local networks, the provider bridge network, and the MPLS network through the LSP A method for transmitting an input received packet will be described in detail.

2 is a flowchart illustrating a method of transmitting a packet input from an external network through an LSP in a packet processing apparatus located in an MPLS-TP network according to an embodiment of the present invention.

As shown, when a packet is input from at least one network among a plurality of local networks, a provider bridge network, and an MPLS network through the LSP, the packet processing apparatus checks whether the input packet is a control packet or a general packet 200). As a result of the check, if the control packet is a control packet, the packet processing device transmits the input packet classified as the control packet to the upper control channel through the CPU interface (201). On the other hand, if it is determined that the input packet is a general packet, the packet processing apparatus checks whether the input packet checked as a general packet is a received packet (202). As a result of the check, if the received packet is a packet, the packet processing device determines the type of the service to be transmitted according to the type of the received packet. Thereafter, the packet processing apparatus generates a service type determined using at least one of Ethernet header information, field information, and MPLS label information included in the received packet according to the determined service type, and generates LSP information according to the generated service type LSP condition information for extraction is obtained (203). Meanwhile, as a result of checking, a method performed in the case of a transmission packet will be described in detail below, and a method of acquiring LSP condition information for extracting LSP information will be described.

3 is a flowchart of a method for acquiring LSP condition information for extracting LSP information in a packet processing apparatus according to an embodiment of the present invention.

As shown in the figure, the packet processing apparatus determines whether a received packet is an MPLS service packet, a PW service packet, or an IP service packet by referring to the field information included in the received packet, ). As a result of the check, if the received packet is an MPLS service packet, the packet processing device acquires the port information and the MPLS label information from the field information included in the received packet. Thereafter, the packet processing apparatus generates a service type determined using the obtained port information and MPLS label information (301). Thereafter, the packet processing apparatus obtains LSP condition information including PTL index information for extracting LSP information related to the service type generated through step 301 from the MPLS ILM table unit (306).

If it is determined that the received packet is a PW service packet, the packet processing apparatus generates a service type determined by combining port information, C-VID, and S-VID information included in the field information of the received packet (302, 303). Thereafter, the packet processing apparatus performs step 306 to obtain LSP condition information including PTL index information for extracting LSP information related to the service type generated through step 303 from the PW FEC table. If the received packet is an IP service packet, the packet processing apparatus obtains information such as port information, C-VID, S-VID, S-MAC, and E-Type included in the field information of the received packet ). Thereafter, the packet processing apparatus generates the service type using the acquired port information, the C-VID, the S-VID, the S-MAC, and the E-Type (305). Thereafter, the packet processing apparatus performs step 306 to obtain LSP condition information including PTL index information related to the service type generated through step 305 from the IP FEC table.

In this manner, the packet processing apparatus can generate the service type using the information included in the received packet according to the received packet, and acquire the LSP condition information including the PTL index information for extracting the LSP information have.

When the LSP condition information is obtained according to the packet type, the packet processing apparatus includes LSP information from the NHLFE table according to whether the PTL index information included in the acquired LSP condition information matches the predetermined PTL index information (204), including forwarding information and header information including TLSP, SLSP or ELSP label information. When the forwarding information and the header information including the SLSP label information are obtained, the packet processing apparatus obtains SLSP label information included in the acquired forwarding information, a token bucket index for policing or shaping to guarantee QoS, Bucket profile information, and checks whether the SLSP information stored in the hash table coincides with each other (205, 206). If it is determined that the SLSP label information included in the forwarding information does not match the SLSP information stored in the hash table, the packet processing apparatus determines the type of the service to which the received packet will be transmitted as the temporary service type stored in the hash table unit (207). At this time, the packet processor updates SLSP and related QoS profile as a new service type to the hash table through learning, updates the service type stored in the hash table to the temporary service type.

If it is determined that the SLSP label information included in the forwarding information matches the SLSP information stored in the hash table, the packet processing apparatus determines the service type of the received packet as the generated service type (208). At this time, it is preferable that the packet processing apparatus updates the service type pre-stored in the hash table to the determined service type. Meanwhile, the packet processing apparatus checks whether the requested bandwidth of the determined service type exceeds a preset threshold value (Step 209). If the determined bandwidth exceeds the threshold value as a result of the check, the packet processing apparatus performs a color- Green, yellow, and red packets, and terminates the transmission of the received packet from the red packet (210). On the other hand, if it is determined that the requested bandwidth of the service type does not exceed the preset threshold value, the packet processing device encapsulates the header update of the received packet and encapsulates the MPLS-TP related labels (211).

On the other hand, if the packet input through step 202 is a transmission packet, the packet processing apparatus can transmit the transmission packet through the following method.

4 is a flowchart illustrating a method of transmitting a transmission packet in a packet processing apparatus located in an MPLS-TP network according to an embodiment of the present invention.

As shown in the figure, if the input packet is a transmission packet, the packet processing apparatus checks whether the destination of transmission of the transmission packet through the set LSP is the PW termination (400). Thereafter, the packet processing apparatus obtains the source MAC address for each output port or MPLS label of the LSP transmission information or the transmission packet for transmitting the transmission packet to the LSP, according to the check result. That is, if it is determined that the destination of the transmission packet is not the PW termination, the packet processing apparatus checks whether the transmission packet is an MPLS packet (401). As a result of the check, if the transmission packet is an MPLS packet, the packet processing apparatus obtains a source MAC address for each output port and MPLS label from the port label table (402). On the other hand, if it is determined that the transmitted packet is not an MPLS packet, the packet processing apparatus obtains a source MAC address for each output port from the S-MAC table (403). Thereafter, the packet processing apparatus checks whether to transmit the transmission packet by multicast or unicast through the field information included in the transmission packet (406). As a result of checking, if it is checked that the unicast is transmitted, the packet processing device determines whether to add or change the tag control information and the new tag, which are acquired from the source MAC address information and the internal header for each output port, through step 410, And updates the source MAC address information by MPLS label or by MPLS label.

On the other hand, if it is checked that the multicast transmission is performed as a result of the check, the packet processing apparatus acquires LSP transmission information for transmission to the LSP through the multicast table (407). Thereafter, the packet processing apparatus checks whether all of the output ports in the multicast group are served (409). If the output ports in the multicast group remain, the packet processing apparatus re-acquires LSP transmission information for transmission to the LSP through step 407 . On the other hand, if all of the output ports in the multicast group have been used as a result of the check, the packet processing apparatus uses the LSP transmission information acquired for transmission to the LSP, And performs an update (410).

On the other hand, if it is determined in step 400 that the destination of the transmission packet is the PW termination, the packet processing apparatus removes the PW header included in the transmission packet (step 404). Thereafter, the packet processing apparatus obtains LSP transmission information for transmitting the transmission packet from the PW multicast table to the LSP (405). That is, the packet processing device acquires the SDT, the PTL index, the tag value, the TM queue index, and the control information for transmitting the transmission packet from the PW multicast table to the LSP. Thereafter, the packet processing apparatus checks whether the transmission packet is to be transmitted by multicast or unicast (406). If it is checked that the packet is transmitted in unicast as a result of the check, the packet processing apparatus updates the header of the transmission packet using the LSP transmission information estimated in step 405 through step 410. On the other hand, if it is checked that the multicast transmission is performed as a result of the check, the packet processing apparatus acquires LSP transmission information for transmission to the LSP through the multicast table (407). Thereafter, the packet processing apparatus stores L2 information and label information from the PW multicast table (408), and then checks whether the output ports in the multicast group are all served (409). As a result of the check, if the output port in the multicast group remains, the packet processing apparatus re-acquires LSP transmission information for transmission to the LSP through step 407. [ If all of the output ports in the multicast group are used as a result of the check, the packet processor updates the header of the transmission packet using the LSP transmission information obtained in step 407 (410).

A packet processing apparatus located in an MPLS-TP network transmits a received packet or a transmission packet input from at least one of a plurality of local networks, a provider bridge network and an MPLS network through an LSP . Hereinafter, each configuration of a packet processing apparatus for transmitting packets input from an external network via an LSP in an MPLS-TP network according to a service type will be described in detail.

5 is a block diagram of a packet processing apparatus for providing a packet transmission service according to an embodiment of the present invention.

As shown, the packet processing apparatus includes a packet classifying unit 500 and a packet processing unit 520. When a packet is input from at least one of the plurality of local networks, the provider bridge network, and the MPLS network, the packet classifying unit 500 classifies the Ethernet header information, the field information, and the MPLS information of the input packet according to the control information of the control register. And extracts the label information. Then, the packet classifying unit 500 classifies whether the packet input through the port information included in the field information is a control packet or a general packet, and if the packet is a control packet, Channel. On the other hand, if the input packet is a general packet, the packet classifying unit 500 checks whether a packet classified as a general packet is a received packet or a transmitted packet. As a result of the check, if the received packet is a packet, the packet classifying unit 500 determines the type of the service to which the received packet is to be transmitted according to the control information of the control register.

The packet processor 520 obtains the LSP condition information or the address information from the field information of the general packet, refers to the obtained LSP condition information or address information, and transmits and inputs the packet, which is input from the packet classifier 500, And updates the header or address information of the packet. The packet processor 520 may obtain the LSP condition information or the address information from the field information of the general packet through the received packet processor 521 and the transmitted packet processor 525. If the input packet is a received packet, the received packet processing unit 521 generates a service type related to the received packet, and obtains LSP condition information from the table related to the generated service type. If the input packet is a transmission packet, the transmission packet processing unit 525 acquires LSP transmission information or address information for transmitting the transmission packet to the LSP according to whether the destination of the transmission packet is the PW termination. The LSP condition information or the address information can be obtained from the field information of the received packet or the transmitted packet inputted through the received packet processing unit 521 and the transmitted packet processing unit 525. More specifically, the received packet processing unit 521 can be achieved through the PW FEC lookup unit 522, the IP FEC lookup unit 523 and the MPLS label lookup unit 524, A port label lookup section 527, a multicast lookup section 528, a PW multicast lookup section 529, The PW FEC lookup unit 522 generates and manages the service type determined by combining the port information, the C-VID, and the S-VID information included in the field information of the received packet according to the determined service type from the packet classifying unit 500 . In addition, the PW FEC lookup unit 522 obtains the packet transport layer (PTL) index information and the tag control information for the other control that can obtain the LSP and parameter values for guaranteeing QoS from the PW FEC table unit 540 . Here, the PW FEC table unit 540 stores PTL index information for extracting LSP information for setting an LSP in the MPLS-TP network from the upper control channel through the CPU interface, and tag control information for other control, The index information is information used in the first NHLFE lookup unit 531 to be described later.

The IP FEC lookup unit 523 uses the port information, the C-VID, the S-VID, the source MAC address, and the E-Type (Ether Type) information included in the field information of the received packet extracted from the packet classifying unit 500 And generates the determined service type from the packet classifying unit 500. In addition, the IP FEC lookup unit 523 receives the PSP index information, the flag for controlling the ELSP (Encapsulation LSP), and the ELSP label information that can acquire the LSP and parameter values for guaranteeing QoS from the IP FEC table unit 541 . Here, the IP FEC table unit 541 stores PTL index information for extracting LSP information for setting an LSP in the MPLS-TP network from the upper control channel through the CPU interface, and ELSP and ELSP label information for other control , And the PTL index information is information used in the first NHLFE lookup unit 531.

The MPLS label lookup unit 524 generates a service type determined from the packet classifying unit 500 using the port information and the MPLS label information included in the field information of the received packet extracted from the packet classifying unit 500. In addition, the MPLS label lookup unit 524 extracts the PTL index information, SDT (Service delimiting tag), new tag, MPLS control information and the like, which can acquire the LSP and parameter values for QoS from the MPLS ILM table unit 542, And acquires tag control information for other control. Here, the MPLS ILM table unit 524 includes PTL index information, SDT (Service delimiting tag), new tag, MPLS control information, and other control for extracting LSP information of the MPLS-TP network from the upper control channel through the CPU interface And the PTL index information is information used in the first NHLFE lookup unit 531. The first NHLFE look-

When the service type is generated from at least one of the PW FEC lookup unit 522, the IP FEC lookup unit 523, and the MPLS label lookup unit 524, and information for extracting the LSP information is obtained, The first NHLFE lookup section 531 determines the service type generated from the lookup section of at least one of the PW FEC lookup section 522, the IP FEC lookup section 523 and the MPLS label lookup section 524. That is, the first NHLFE lookup unit 531 determines whether the information obtained from the lookup unit of at least one of the PW FEC lookup unit 522, the IP FEC lookup unit 523, and the MPLS label lookup unit 524 matches, And determines the service type generated by the lookup unit. According to the embodiment, the first NHLFE lookup unit 531 receives information from the lookup unit of at least one of the PW FEC lookup unit 522, the IP FEC lookup unit 523, and the MPLS label lookup unit 524, If the index information matches the pre-stored PTL index information, the service type is determined by the lookup unit.

The first NHLFE lookup unit 531 receives a switch fabric for transmitting a received packet through the LSP set in the MPLS-TP network from the index table unit 543, a transmit / receive output port, a tag value, a TM , A TB (Token bucket) profile, a packet counter, and other control information for control.

The second NHLFE lookup unit 532 receives the PTL index information and the PTL index information of the information obtained from the lookup unit of at least one of the PW FEC lookup unit 522, the IP FEC lookup unit 523, and the MPLS label lookup unit 524, It is checked whether or not the previously stored PTL index information coincides with each other, and if they match, the service type generated by the lookup unit is determined. Also, the second NHLFE lookup unit 532 acquires MPLS-TP layer related information and label control information for incorporating the LSP information set in the MPLS-TP network into the received packet from the service table unit 544. The service table unit 544 includes an MPLS-TP layer-related SLSP (Service LSP) label, a TLSP (Transport LSP) label for incorporating the LSP information set in the MPLS-TP network into the corresponding received packet from the upper control channel through the CPU interface, A label, an EXP, a Stack, a TTL, a PTL index, a Destination MAC (D-MAC) or Multicast ID (M-ID)

As described above, the MPLS-TP layer related labels stored in the service table unit 544 are as shown in FIG.

6 is an exemplary diagram illustrating a service type provided according to the MPLS-TP standard in the packet processing apparatus according to an embodiment of the present invention.

As shown, the MPLS-TP layer 600 is divided into a PW adaptation layer (PWAL) and a network adaptation layer (NAL) in relation to the MPLS-TP standard. An ELSP (Encapsulation label) be used. The layer stack referred to in the present invention means to stack all the basic labels (SLSP, TLSP or ELSP, SLSP, TLSP) of the MPLS-TP layer. The label stack stacks only the TLSP , Which is supported through the label control information of the control management unit 533. Accordingly, the second NHLFE lookup unit 532 receives the MPLS-TP layer related SLSP (Service LSP) label, TLSP (Transport LSP) label, EXP, Stack, TTL, PTL index, D -MAC (Destination MAC) or M-ID (Multicast ID) information and layer control information.

The control signals managed by the control management unit 533 are shown in FIG.

7 is an exemplary diagram illustrating a control signal to be controlled by the control management unit of the packet processing apparatus according to an embodiment of the present invention.

As shown, the control signals include a pseudo wire service enable 700, an ingress multicast enable 701 and 702, an MPLS-TP layer stack enable, 703, a multicast copy enabled 704, a multicast enable (RX Enabled, TX Enabled) 705, 706 at a transmitting / receiving end, a PW termination flag 707, (708), and a Label Valid Flag (709). Accordingly, the control management unit 533 transmits the control signals to the second NHLFE lookup unit 532, the header processor unit 534, the multicast lookup unit 528, and the PW multicast lookup unit 529.

Meanwhile, according to a further aspect of the present invention, the packet processing unit 520 further includes a PTL lookup unit 535. The PTL lookup unit 535 extracts a token bucket index for QoS assurance from the SLSP label information obtained from the second NHLFE lookup unit 532, and policing to guarantee QoS from the PTL table unit 549, a token bucket index for shaping, Token bucket profile information.

According to a further aspect of the present invention, the packet processing unit 520 further includes a hash TB (Hash / Token bucket) counter lookup unit 536 and a traffic management unit 537. The hash TB (Hash / Token bucket) counter lookup unit 536 checks whether the SLSP label information obtained from the second NHLFE lookup unit 532 matches the SLSP label information stored in the hash table unit 545. If the SLSP label information obtained from the second NHLFE lookup unit 532 does not match the SLSP label information stored in the hash table unit 545 as a result of the check, the hash / TB counter lookup unit 536 checks the PTL table unit 549, And adds a new hash entry to the hash table unit 545 through learning to update the hash table unit 545, and determines to transmit the received packet.

On the other hand, if the two SLSP label information match as a result of the check, the hash / TB counter lookup unit 536 determines to transmit the received packet to the generated service type. Thereafter, the hash / TB counter lookup unit 536 updates the service type previously stored in the hash table unit 545 to the corresponding service type. At this time, the hash / TB counter lookup unit 536 checks whether the requested bandwidth of the corresponding service type exceeds the threshold stored in the TB counter table unit 546, and if the threshold value is exceeded, ), Yellow (Yellow), and Red (Red), and then transmits a control signal related to the termination of the reception packet transmission to the traffic management unit 228.

Accordingly, the traffic management unit 537 terminates the transmission of the received packet according to the control signal related to the end of transmission of the received packet transmitted from the hash / TB counter lookup unit 536. In addition, the traffic management unit 537 applies policing and shaping for the received packet according to the QoS profile information of the QoS profile unit 553 set through the CPU interface from the upper control channel, and then transmits a packet do.

According to a further aspect of the present invention, the packet processing unit 220 further includes a TTL control unit 538. [ The TTL control unit 538 performs a TTL copy function if the TLSP or SLSP related to the MPLS-TP layer is a TTL subtraction if it is a swap or a TTL copy function according to a TTL processing mode (a Short Pipe model or a Uniform model) (Push), and performs a function of initializing the TTL with the TTL value acquired from the second NHLFE lookup unit 532.

Meanwhile, according to a further aspect of the present invention, the packet processing unit 220 further includes a header processing unit 534 and a header generating unit 539. The header generating unit 539 generates the internal header 1 including the input switch port and the output switch port information at the S-Tag position through the information obtained from the first and second NHLFE lookup units 531 and 532. The header generation unit 539 generates an output line card port, multicast control information, PW termination control, PW tag control information, SDT type information, and color-marking color ), Switch state information indicating whether the switch is an active switch or a stand-by switch, a working path for protection switching, a path state information indicating whether the switch is a protection path, a SLSP And internal header 2 including control information indicating whether the tag is pushed and new tag information. Finally, the header generating unit 539 uses the internal header 3 as the unicast D-MAC when the D-MAC position is unicast, and uses the internal header 3 including the multicast ID (M-ID) And generates a header 3.

The header processing unit 534 processes the MPLS-TP layer-related TLSP and the SLSP or ELSP label in accordance with the control command of the control management unit 533 to transmit the received packet to the destination network through the LSP set in the MPLS- ), Swap (Swap) or pop (Pop) function is set.

The header processing unit 534 updates the TTL field of the highest-level label (TLSP or SLSP) related to the MPLS-TP layer according to the factor value applied through the TTL subtraction, the TTL copy, and the TTL setting from the TTL control unit 538 do. In addition, the header processing unit 534 inserts, removes, or changes the tag in the field information of the received packet so as to be suitable for the destination network. The header processing unit 534 includes three internal headers generated according to the information obtained from the first and second NHLFE lookup units 531 and 532 from the header generating unit 539 in the received packet. That is, in the case of a received packet, the header processing unit 534 encapsulates the packet stored in the packet memory unit 547 with the TLSP and the SLSP label acquired in the second NHLFE lookup unit 532 according to the header condition information, (D-MAC) address at the internal header position after removing the internal header in the case of the transmission packet, inserting the D-MAC (Destination MAC address) Only the multicast is updated, and the source MAC address (S-MAC) is updated. Then, the L2 VLAN tag can be added, removed or changed to the destination network such as the local network, the provider bridge network, and the MPLS network.

According to a further aspect of the present invention, the packet processing unit 520 further includes an OAM packet processing unit 550 and a path protection switching unit 551. The OAM packet processing unit 550 checks whether the path of the packet classified from the packet classifying unit 500 is abnormal by using the SLSP OAM, the TLSP OAM, and the PW OAM stored in the OAM table unit 548. That is, the OAM packet processing unit 550 transmits a Continuity Check message (CCM) to the input packet, receives a response message corresponding thereto, and checks whether there is a problem in the path through which the packet is input. However, the present invention is not limited to this, and the OAM packet processing unit 550 may transmit a link trace message (LTM), a link trace reply (LTR), a loopback message (LBM) And can check whether there is a problem in the path through which the packet is input by receiving the response message accordingly. According to the response message, if it is checked that there is an error in the path, the path protection switching unit 551 carries out a protection switching with a path that can replace the path currently being serviced.

If it is checked that the general packet classified by the packet classifying unit 500 is a transmission packet, as described above, the transmission packet processing unit 525 includes a port lookup unit 526, a port label lookup unit 527, It is possible to change transmission header, SDL (Service Delimiting Tag), and change, add or remove a new VLAN tag by using the information obtained through the lookup unit of one of the lookup unit 528 and the PW multicast lookup unit 529 have. If the packet classified as a general packet is a transmission packet other than an MPLS packet, the port lookup unit 234 updates the source MAC address from the output port included in the field information of the transmission packet including the Internal header as shown in FIG. 8, And obtains the source MAC address, the TM queue index, and the packet counter index information of the output port from the MAC table unit 560.

8 is a diagram illustrating an example of a location of an internal header included in field information of a transmission packet according to an embodiment of the present invention.

As shown, the Internal Headers 1, 2, and 3 are included in the positions of the S-TAG, the S-MAC, and the D-MAC. Accordingly, the port lookup unit 526 acquires Internal Headers 1, 2, and 3 from the S-TAG, the S-MAC, and the D-MAC, updates the source MAC address through the output port information loaded in the acquired Internal header can do.

On the other hand, if the packet classified as a general packet is an MPLS transmission packet, the port label lookup unit 527 updates the source MAC address from the output port included in the field information of the transmission packet including the Internal header and the highest MPLS label, The source MAC address, the TM queue index, and the packet counter index information of the output port are obtained from the label table unit 561. Meanwhile, the multicast lookup unit 528 determines whether to transmit the multicast or unicast packet through the M-ID information and the flag of at least one label included in the field information of the transmission packet. The multicast lookup unit 528 also receives a D-MAC (Destination MAC) address, a PTL index, an MPLS-TP layer label for transmitting a transmission packet to the LSP set in the MPLS-TP network through the multicast table unit 562 EXPs, STACKs, TTLs, Tag value, TM queue index, counter index, and control information.

Meanwhile, the PW multicast lookup unit 529 determines whether to transmit the transmission packet by multicast or unicast through the M-ID information and the flag of at least one label included in the field information of the transmission packet. The PW multicast lookup unit 529 acquires the SDT, the PTL index, the tag value, the TM queue index, and the control information for transmitting the transmission packet from the PW multicast table unit 563 to the LSP set in the MPLS-TP network do. At this time, if the PW termination flag is enabled, the PW decapsulation unit 530 removes the PW.

Up to now, each configuration of the packet processing apparatus according to the present invention has been described in detail. Hereinafter, an example of performing a packet transmission service in the packet processing apparatus will be described with reference to FIG. 9 through FIG.

FIG. 9A illustrates an example of performing a packet transmission service through an LSP established in an MPLS-TP network according to an exemplary embodiment of the present invention. FIG. FIG. 2 is a diagram illustrating an example of performing a packet transmission service through the Internet.

9A is a network adaptation layer service (# 1) using an input port and a C-Tag included in an input packet. As shown in FIG. 1, the network adaptation layer service (# 1) using the input port and the C-Tag includes an access switch, a packet processing device 100h, and a packet processing device 100h located in the user 1 -> customer network 20 The packet service is provided through the LSP # 1 of the MPLS-TP network in order of access switch-> user 3 located in the customer network 30. That is, the packet 900 inputted through the customer network 20 is converted into a packet transmission frame 910 in the MPLS-TP network, and the converted packet transmission frame 910 is transmitted through the packet processing device 100h to the destination And is transmitted to the packet processing apparatus 100g located in the network. Here, the presence or absence of the ELSP included in the packet transmission frame 910 is determined depending on whether the E-Type is determined when determining the service type, one of the two TLSPs is mandatory, and the second TLSP is selectively provided with a label stack . Therefore, it is possible to add a TLSP label stack according to the MPLS-TP network element. On the other hand, the packet processing apparatus 100g located in the destination network determines whether the C-Tag and the S-Tag exist from the corresponding packet transmission frame 910 using the tag control information, and stores the header of the packet transmission frame 910 And transmits a transmission packet 920 related to the packet transmission frame 910 to the customer network 30 as a destination.

6B is a network adaptation layer service (# 2) using an S-Tag and an input port included in the input packet. As shown in FIG. 1, the network adaptation layer service (# 2) using the input port and the S-Tag includes an access switch, a packet processing device 100a located in the user 2 -> provider bridge network 50, The packet service is provided through the LSP # 2 and the LSP # 11 of the MPLS-TP network in the order of the processing apparatus 100f, the packet processing apparatus 100e, the provider bridge network 60, and the user 5. That is, the packet 930 inputted through the provider bridge network 50 is converted into a packet transmission frame 940 in the MPLS-TP network, and the converted packet transmission frame 940 is transmitted to the packet processing unit 940, 0.0 > 100e. ≪ / RTI > Here, the presence or absence of the ELSP included in the packet transmission frame 940 is determined depending on whether the ELSP is included in the E-Type when determining the service type, one of the two TLSPs is mandatory, and the second TLSP is optional will be. Therefore, it is possible to add a TLSP label stack according to the MPLS-TP network element. Meanwhile, the packet processing apparatus 100e located in the destination network determines whether the C-Tag and the S-Tag exist in the packet transmission frame 940 using the tag control information, and transmits the header of the packet transmission frame 940 And transmits the transmission packet 950 related to the packet transmission frame 940 to the provider bridge network 60 which is the destination.

FIG. 10A illustrates an example of performing a packet transmission service through an LSP established in an MPLS-TP network according to an exemplary embodiment of the present invention. FIG. FIG. 2 is a diagram illustrating an example of performing a packet transmission service through the Internet.

10A is a network adaptation layer service (# 3) using an MPLS label and an input port included in an input packet. As shown in FIG. 1, the network adaptation layer service (# 3) using the input port and the MPLS label includes the access switch-> the packet processing apparatus 100b-> the packet processing apparatus 100c-> located in the MPLS network 70. [ The packet service is provided through the LSP # 8 and the LSP # 7 of the MPLS-TP network in the order of the access switch located in the packet processing apparatus 100f-> the MPLS network 80. [ That is, the packet 1000 input through the MPLS network 70 is converted into a packet transmission frame 1010 in the MPLS-TP network, and the packet transmission frame 1010 is transmitted to the packet processing apparatus 100c ). Here, the presence or absence of the ELSP included in the packet transmission frame 1010 is determined according to whether the E-Type is considered when determining the service type, one of the two TLSPs is mandatory, and the second TLSP is optionally made up of a label stack will be. Therefore, it is possible to add a TLSP label stack according to the MPLS-TP network element. On the other hand, the packet processing apparatus 100c located in the destination network determines whether the C-Tag and the S-Tag exist in the packet transmission frame 1010 using the tag control information and stores the header of the packet transmission frame 1010 And transmits a transmission packet 1020 related to the packet transmission frame 1010 to the MPLS network 80 as a destination.

10B is a network adaptation layer service (# 4) using an input port and an S-Tag of an input packet when the destination network is different from the network adaptation layer service (# 2) using an input port and an S-Tag. As shown in FIG. 1, the network adaptation layer service (# 4) using the input port of the input packet and the S-Tag is connected to the access switch-> packet processing device The access router located in the customer network 40 receives the packet through the LSP # 4 and the LSP # 10 of the MPLS-TP network in the order of the user 4 and the access router located in the customer network 40, Service is provided. That is, the packet 1000 inputted through the provider bridge network 50 is converted into a packet transmission frame 1030 in the MPLS-TP network, and the converted packet transmission frame 1030 is transmitted to the packet processing apparatus 1030 located in the destination network. (100d). The presence or absence of the ELSP included in the packet transmission frame 1030 is determined depending on whether the ELSP is included in the E-Type when determining the service type, one of the two TLSPs is mandatory, and the second TLSP is optional will be. Therefore, it is possible to add a TLSP label stack according to the MPLS-TP network element. On the other hand, the packet processing apparatus 100d located in the destination network determines the presence or absence of the C-Tag and the S-Tag in the packet transmission frame 1010 using the tag control information and transmits the header of the packet transmission frame 1010 And transmits the transmission packet 1050 related to the packet transmission frame 1040 to the customer network 40, which is the destination.

FIG. 11A illustrates an example of performing a packet transmission service through an LSP established in an MPLS-TP network according to an exemplary embodiment of the present invention. FIG. FIG. 2 is a diagram illustrating an example of performing a packet transmission service through the Internet.

11A is a PW adaptation layer service (# 5) using an input port included in an input packet and a C-Tag. The PW adaptation layer service (# 5) using the input port and the C-Tag is connected to the customer edge node 21, the packet processing apparatus 100a, the packet processing apparatus 100f, The packet service is provided through LSP # 4, LSP # 8 and LSP # 10 of the MPLS-TP network in the order of the node 22. That is, the packet 1100 input through the customer edge node 21 is converted into a packet transmission frame 1110 in the MPLS-TP network, and the packet transmission frame 1110 is transmitted to a packet processing apparatus 100f. Here, the PW Encap, PW Label and TLSP included in the packet transmission frame 1110 are mandatory, and it is possible to add a TLSP label stack according to the constituent elements of the MPLS-TP network. On the other hand, the packet processing apparatus 100f located in the destination network uses the SDT control information related to one of the two modes (Raw mode, Tagged mode) of the PW to determine whether the C-Tag and the S- . The packet processing apparatus 100f updates the header of the corresponding packet transmission frame 1110 and then transmits the transmission packet 1120 related to the packet transmission frame 1110 to the customer edge node 22 as the destination.

11B is a PW adaptation layer service (# 6) using an S-Tag and an input port included in the input packet. As shown in FIG. 1, the PW adaptation layer service (# 6) using the input port and the S-Tag includes a customer edge node 51, a packet processing apparatus 100a, a packet processing apparatus 100f, The packet service is provided through the LSP # 2 of the MPLS-TP network in the order of the node 52. That is, the packet 1130 input through the customer edge node 51 is converted into a packet transmission frame 1140 in the MPLS-TP network, and the packet transmission frame 1140 is transmitted to the packet processing apparatus 100f. Here, PW Encap, PW Label, and TLSP included in the packet transmission frame 1140 are mandatory, and it is possible to add a TLSP label stack according to a component of the MPLS-TP network. On the other hand, the packet processing apparatus 100f located in the destination network uses the SDT control information related to one of the two modes (Raw mode, Tagged mode) of the PW to determine whether the C-Tag and the S- . The packet processing apparatus 100f updates the header of the corresponding packet transmission frame 1140 and then transmits a transmission packet 1150 related to the corresponding packet transmission frame 1140 to the customer edge node 52 as a destination.

The present invention has been described with reference to the preferred embodiments.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

10: MPLS-TP network 20, 30, 40: customer network
21, 22, 51, 52: customer edge node 50, 60: provider bridge network
70, 80: MPLS network 100: packet processing device
500: packet classification unit 520: packet processing unit
521: received packet processing unit 222: PW FEC lookup unit
223: IP FEC lookup unit 224: MPLS label lookup unit
525: transmission packet processing unit 526: port lookup unit
527: Port label lookup section 528: Multicast lookup section
529: PW multicast lookup unit 530: PW decapsulation unit
531,532: First and second NHLFE lookup units 533: Control management unit 534: Header processing unit 535: PTL lookup unit
536: Hash / TB counter lookup unit 537: Traffic management unit
538: TTL control unit 539: Header generating unit
540: PW FEC table portion 541: IP FEC table portion
542: MPLS ILM table section 543: Index table section
544: service table portion 545: hash table portion
546: TB counter table section 547: Packet memory section
548: OAM table section 549: PTL table section
550: OAM packet processing unit 551: Path protection switching unit
553: QoS profile section 560: S-MAC table section
561: Port label table section 262: Multicast table section
263: PW multicast table unit

Claims (24)

A method for transmitting a received packet in a packet processing apparatus located in an MPLS-TP network,
Generating service type related to field information of the received packet and obtaining LSP condition information from a table related to the generated service type;
Obtaining forwarding information and header information from the NHLFE table according to whether or not the PTL index information included in the obtained LSP condition information matches predetermined PTL index information;
Determining whether the SLSP label information of the obtained forwarding information matches the SLSP information stored in the hash table to generate the generated service type or temporary service type;
Encapsulating the header update of the received packet and the MPLS-TP label according to whether the requested bandwidth of the determined service type exceeds a predetermined threshold value, and transmitting the received packet or terminating the transmission of the received packet;
And transmitting the received packet to the MPLS-TP network. 2. The method of claim 1, wherein obtaining the LSP condition information comprises:
Checking whether the received packet is an MPLS service packet, a PW service packet, or an IP service packet by referring to the field information included in the received packet, and determining a service type for transmitting each packet;
Generating the determined service type using the port information and the MPLS label information included in the field information if the packet is an MPLS service packet;
Obtaining LSP condition information including PTL index information related to the generated service type from the MPLS ILM table;
And transmitting the received packet to the MPLS-TP network. 3. The method of claim 2, wherein obtaining the LSP condition information comprises:
Generating a determined service type by combining the port information, the C-VID, and the S-VID information included in the field information if the packet is a PW service packet;
Obtaining LSP condition information including PTL index information related to the generated service type from a PW FEC table;
And transmitting the received packet to the MPLS-TP network. 4. The method of claim 3, wherein obtaining the LSP condition information comprises:
Generating the determined service type by combining the port information, the C-VID, the S-VID, the S-MAC, and the E-Type information included in the field information if the IP service packet is the check result;
Obtaining LSP condition information including PTL index information related to the generated service type from an IP FEC table;
And transmitting the received packet to the MPLS-TP network. 2. The method of claim 1, wherein determining the generated service type or temporary service type comprises:
Updating the service type pre-stored in the hash table to the generated service type if the SLSP information matches the SLSP information, and updating the temporary service type in the hash table if the SLSP information does not match the SLSP information. A method for transmitting received packets in a TP network. 2. The method of claim 1, wherein the step of transmitting the received packet or terminating the transmission of the received packet comprises:
Encapsulating the header of the received packet and the MPLS-TP label to transmit the received packet if the predetermined threshold is not exceeded, and if the predetermined threshold is exceeded, And terminating the transmission of the received packet in the MPLS-TP network. A method for transmitting a transmission packet in a packet processing apparatus located in an MPLS-TP network,
Checking whether the destination of the transmission packet is a PW termination through a predetermined LSP;
Obtaining LSP transmission information for transmitting the transmission packet to the LSP or a source MAC address for each output port or MPLS label of the transmission packet according to the check result;
Updating a header of the transmission packet or a source MAC address for each output port of the transmission packet or for each MPLS label according to whether the transmission packet is transmitted through multicast or unicast through the field information of the transmission packet;
And transmitting the transmission packet to the MPLS-TP network. 8. The method of claim 7, wherein obtaining the source MAC address for each of the output ports or the MPLS label of the LSP transmission information or the transmission packet comprises:
If the result of the checking is the PW termination, removing the PW header included in the transmission packet;
Obtaining LSP transmission information for transmitting the transmission packet from the PW multicast table;
And transmitting the transmission packet to the MPLS-TP network. 9. The method of claim 8, wherein updating the header of the transmission packet or the source MAC address by output port of the transmission packet or by MPLS label comprises:
Checking whether to transmit the transmission packet by multicast or unicast through the field information included in the transmission packet;
As a result of the checking, if the unicast transmission is performed, the header of the transmission packet is updated using the acquired LSP transmission information. If the multicast transmission result is LSP transmission information for transmitting the transmission packet from the multicast table Storing L2 information and label information in the multicast table;
Checking whether all the ports in the multicast group have been serviced;
If the ports in the multicast group are all served, the header of the transmission packet is updated using the acquired LSP transmission information. If the output port in the multicast group is left, Re-acquiring LSP transmission information;
And transmitting the transmission packet to the MPLS-TP network. 8. The method of claim 7, wherein obtaining the source MAC address for each of the output ports or the MPLS label of the LSP transmission information or the transmission packet comprises:
If it is determined that the received packet is not the MP termination, checking whether the transmitted packet is an MPLS packet;
If the MPLS packet is not an MPLS packet, acquiring a source MAC address for each output port from the S-MAC table if the MPLS packet is not an MPLS packet;
And transmitting the transmission packet to the MPLS-TP network. 11. The method of claim 10, wherein updating the source MAC address by header of the transmission packet or output port of the transmission packet or by MPLS label comprises:
Checking whether to transmit the transmission packet by multicast or unicast through the field information included in the transmission packet;
If the result of the check indicates that the multicast packet is a multicast packet, the source MAC address information for each of the obtained output ports or the obtained MPLS label is updated. If the multicast packet is a multicast packet, Obtaining LSP transmission information for transmission and checking whether an output port in the multicast group is left;
If it is determined that all the output ports in the multicast group have been serviced, updating the header of the transmission packet using the obtained LSP transmission information, if the output port in the multicast group is left as a result of the check, Re-acquiring LSP transmission information for transmission to the LSP;
And transmitting the transmission packet to the MPLS-TP network. A packet processing apparatus for transmitting a packet input from a plurality of networks via an LSP (Label Switched Path) located in an MPLS-TP network,
From the port information of the field information of the input packet extracted according to the control information of the control register, whether the input packet is a control packet or a general packet, and if the input packet is a general packet, A packet classifying unit for determining a type of a service to which the general packet is to be transmitted according to whether the packet is a packet or a transmission packet;
Acquiring LSP condition information or address information from the field information of the general packet, referring to the obtained LSP condition information or the address information, and transmitting the input packet and the input packet to a service type determined from the packet classification unit A packet processing unit for updating the header or address information;
To the packet processing apparatus. 13. The apparatus of claim 12, wherein the packet classifier comprises:
If the input packet is a control packet, transmits the control packet to an upper control channel through a CPU interface,
Wherein the packet processing unit comprises:
A receiving packet processor for generating a service type associated with the received packet if the input packet is a received packet and obtaining LSP condition information from a table related to the generated service type;
A transmission packet processing unit for obtaining LSP transmission information or address information for transmitting the transmission packet to the LSP according to whether the input packet is a transmission packet or a destination of the transmission packet is a PW type;
To the packet processing apparatus. 14. The apparatus of claim 13, wherein the received packet processing unit comprises:
Generates the determined service type by combining port information, C-VID, and S-VID information included in the field information of the received packet according to a service type determined from the packet classification unit, extracts LSP information from the PW FEC table unit A PW FEC lookup unit that obtains PTL index information and tag control information for performing a predetermined function;
To the packet processing apparatus. 14. The apparatus of claim 13, wherein the received packet processing unit comprises:
For extracting LSP information from the IP FEC table unit by generating the determined service type by combining port information, C-VID, S-VID, source MAC address, and E-Type information included in the field information of the received packet An IP FEC lookup unit for obtaining PTL index information, a control flag for controlling ELSP, and ELSP label information;
To the packet processing apparatus. 14. The apparatus of claim 13, wherein the received packet processing unit comprises:
Generates the determined service type using the port information and the MPLS label information included in the field information of the received packet, and generates PTL index information and SDT, new tag, MPLS control information and the like for extracting LSP information from the MPLS ILM table unit, An MPLS label lookup unit for obtaining tag control information for other control;
To the packet processing apparatus. 17. The apparatus according to any one of claims 14 to 16, wherein the received packet processing unit comprises:
A switch fabric for determining a service type generated by the lookup unit according to whether the information obtained by at least one lookup unit of each of the lookup units coincides with each other and transmitting the received packet from the index table unit through the LSP, A first NHLFE lookup unit for acquiring tag control information for a transmission / reception output port, a tag value, a TM queue index, a TB profile, a packet counter, and other controls;
A second NHLFE lookup unit for obtaining SLSP labels related to the MPLS-TP layer, a plurality of TLSP labels, EXP, Stack, TTL, Next PTL index information, D-MAC or M-ID and label control information from the service table unit;
Further comprising: a packet generation unit for generating a packet based on the received packet; 18. The apparatus of claim 17, wherein the packet processor comprises:
A PTL lookup unit for obtaining token bucket index and token bucket profile information for policing or shaping to ensure QoS from the PTL table unit;
A hash function for determining transmission of the received packet to a temporary service type previously stored in the generated service type or hash table according to whether the SLSP label obtained from the second NHLFE lookup unit matches the SLSP label stored in the service table unit, / TB counter lookup unit,
The hash / TB counter lookup unit
If the two SLSP labels match, the service type stored in the hash table unit is updated to the generated service type. If the two SLSP labels are transmitted to the generated service type, information obtained from the PTL table unit is run, And determines whether to transmit the received packet in the order of the color-marked packets through metering according to whether the requested bandwidth of the service type exceeds the threshold value stored in the TB counter table unit. Gt; 19. The apparatus of claim 18, wherein the packet processor comprises:
A traffic management unit for terminating the transmission of the received packet according to a determination of whether the received packet is transmitted from the hash / TB counter lookup unit or according to a QoS profile set through the CPU interface from the upper control channel;
A header generator for generating three internal headers based on the information obtained from the first and second NHLFE lookups;
Encapsulation through the push / swap or pop function of the TLSP and SLSP labels associated with the MPLS-TP layer, decapsulation and decapsulation through the LSP to the destination network, An internal header encapsulation and a VLAN tag information obtained from the first NHLFE lookup unit so as to be suitable for the destination network, into or from the field information of the received packet;
Further comprising: a packet generation unit for generating a packet based on the received packet; 20. The apparatus of claim 19, wherein the packet processing unit comprises:
If the MPLS-TP layer related top-level label (TLSP or SLSP) is swapped, the TTL is subtracted. If the MPLS-TP layer is popped, TTL copying is performed according to the TTL processing mode. And a TTL control unit for initializing the TTL from the TTL value acquired from the TTL control unit,
The header processing unit
Updates the TTL field of the highest label associated with the MPLS-TP layer according to a factor value applied through the TTL control unit through TTL subtraction, TTL copy, and TTL initialization, and updates the TTL field of the highest- And inserts, changes, or removes the internal header generated from the header generation unit in the header. 14. The apparatus of claim 13, wherein the packet processor comprises:
An OAM packet processing unit for checking whether the path of the classified packet is abnormal using the SLSP OAM, the TLSP OAM, and the PW OAM stored in the OAM table unit;
A path protection switching unit for performing protection switching with a path related to a path through which the packet is input if it is checked that the path to which the packet is input is abnormal as a result of checking by the OAM packet processing unit;
Further comprising: a packet generation unit for generating a packet based on the received packet; 21. The apparatus of claim 20, wherein the transmission packet processing unit comprises:
And updates the source MAC address from the output port included in the field information of the transmission packet if the transmission packet is not an MPLS transmission packet including the Internal header and updates the source MAC address TM A queue index, and a packet counter index information;
And updates the source MAC address from the output port included in the field information of the MPLS transmission packet and the highest label associated with the MPLS-TP layer if the MPLS transmission packet includes the Internal header, A port label lookup unit for obtaining MAC address, TM queue index, and packet counter index information;
To the packet processing apparatus. 24. The apparatus of claim 22, wherein the transmission packet processing unit comprises:
Determines whether to transmit the transmission packet by multicast or unicast through M-ID information and a flag of at least one label included in the extracted field information, and transmits the transmission packet to the LSP set in the MPLS-TP network through the multicast table unit A multicast lookup unit for obtaining a destination MAC address, a PTL index, an MPLS-TP layer label, EXPs, STACKs, TTLs, a tag value, a TM queue index, ;
Further comprising: a packet generation unit for generating a packet based on the received packet; 24. The apparatus of claim 23, wherein the transmission packet processing unit comprises:
Determines whether to transmit the transmission packet by multicast or unicast through M-ID information and a flag of at least one label included in the extracted field information, and transmits the LSP A PW multicast lookup unit for obtaining an SDT, a PTL index, a tag value, a TM queue index and control information for transmitting the transmission packet;
A PW decapsulation unit that, when the PW termination flag is enabled, removes the PW;
Further comprising: a packet generation unit for generating a packet based on the received packet;

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