CN101610216A - Ethernet message forwarding method, Apparatus and system - Google Patents
Ethernet message forwarding method, Apparatus and system Download PDFInfo
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Abstract
The embodiment of the invention relates to a kind of Ethernet message forwarding method, Apparatus and system, and by reception Ethernet message to be transmitted, described Ethernet message carries the control VLAN ID; According to described control VLAN ID and forwarding information, determine to transmit described Ethernet message corresponding output port; Transmit described Ethernet message by described outbound port.Thereby under the situation that the mode that still adopts clean culture E-Packets, control VLAN ID and the forwarding information entrained according to the Ethernet message, determine to transmit Ethernet message corresponding output port, therefore avoided forwarding unit when transmitting the Ethernet message, need the study media access control address, guaranteed the Ethernet message forward efficiency of forwarding unit.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, and a system for forwarding an ethernet packet.
Background
In the current Ethernet solution, as shown in fig. 1, a Virtual Private local area network (VPLS: Virtual Private LAN Service) is used to construct an ME network, a User accesses a User side Provider Edge device (UPE: User facing Provider Edge) through a Digital Subscriber Line Access Multiplexer (DSLAM), the e and the Provider Edge device (PE: Provider Edge) form a VPLS network, and the PE terminates the VPLS Service and enters a three-layer network through a network side Provider Edge device (NPE: network facing Provider Edge).
The existing scheme has two message forwarding methods: firstly, closing Media Access Control (MAC) address learning, and broadcasting a message in a Virtual Switching Instance (VSI); and secondly, learning the MAC address, and forwarding the message in a unicast mode.
If the message is broadcast in the VSI, the forwarding performance and the network bandwidth are greatly influenced, so that the method is not feasible; if the MAC address learning mode is adopted, that is, the message is forwarded according to the MAC address, the device needs to learn the MAC addresses of all users, and when the number of users increases, the requirement on the device becomes higher and higher. The current specification is required to support 128K MAC addresses, and the specification tends to expand, which results in that the capacity of the MAC address table required to be stored by the device is increased, and the forwarding efficiency of the device is reduced.
Disclosure of Invention
Embodiments of the present invention provide a method, an apparatus, and a system for forwarding an ethernet packet, so as to avoid a forwarding device from learning a mac address.
The embodiment of the invention provides a message forwarding method of an Ethernet metropolitan area network, which comprises the following steps in a virtual private local area network service network:
receiving an Ethernet message to be forwarded, wherein the Ethernet message carries a control virtual local area network identifier;
determining an output port corresponding to the Ethernet message to be forwarded according to the control virtual local area network identifier and the forwarding information;
and forwarding the Ethernet message through the output port.
The embodiment of the invention also provides a user side operator edge device, in the virtual private local area network service network, the device comprises:
the receiving module is used for receiving an Ethernet message to be forwarded, wherein the Ethernet message carries a control virtual local area network identifier;
a determining module, configured to determine, according to a control virtual local area network identifier and forwarding information carried in the ethernet packet received by the receiving module, an output port corresponding to the ethernet packet to be forwarded;
and the forwarding module is used for forwarding the Ethernet message received by the receiving module through the output port determined by the determining module.
The embodiment of the invention also provides an operator edge device, in the virtual private local area network service network, the device comprises:
the receiving module is used for receiving an Ethernet message to be forwarded, wherein the Ethernet message carries a control virtual local area network identifier;
a determining module, configured to determine, according to a control virtual local area network identifier and forwarding information carried in the ethernet packet received by the receiving module, an output port corresponding to the ethernet packet to be forwarded;
and the forwarding module is used for forwarding the Ethernet message received by the receiving module through the output port determined by the determining module.
The embodiment of the invention also provides an Ethernet metropolitan area network message forwarding system, in the virtual private local area network service network, the system comprises:
the user side operator edge device is used for receiving an Ethernet message to be forwarded, wherein the Ethernet message carries a control virtual local area network identifier, determining an output port corresponding to the Ethernet message to be forwarded according to the control virtual local area network identifier and forwarding information carried by the Ethernet message, and forwarding the Ethernet message to the operator edge device or the user side device through the output port;
the provider edge device is configured to receive an ethernet packet to be forwarded, where the ethernet packet carries a control virtual local area network identifier, determine an egress port corresponding to the ethernet packet to be forwarded according to the control virtual local area network identifier and forwarding information carried by the ethernet packet, and forward the ethernet packet to a network side provider edge device or a user side provider edge device through the egress port.
According to the technical scheme provided by the embodiment of the invention, the Ethernet message to be forwarded is received, and the Ethernet message carries the control virtual local area network identifier; determining an output port corresponding to the Ethernet message to be forwarded according to the control virtual local area network identifier and the forwarding information; and forwarding the Ethernet message through the output port. Therefore, under the condition that the message is still forwarded in a unicast mode, the corresponding output port of the forwarded Ethernet message is determined according to the control virtual local area network identifier and the forwarding information carried by the Ethernet message, so that the condition that the forwarding equipment needs to learn the media access control address when forwarding the Ethernet message is avoided, and the Ethernet message forwarding efficiency of the forwarding equipment is ensured.
Drawings
Fig. 1 is a schematic diagram of a networking structure of an ethernet metropolitan area network in the prior art;
fig. 2 is a first schematic diagram of a specific implementation of the method according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a specific implementation of the method according to the embodiment of the present invention;
fig. 4 is a schematic diagram of a specific implementation of the method according to the embodiment of the present invention;
fig. 5 is a schematic diagram of a specific implementation of the method according to the embodiment of the present invention;
fig. 6 is a schematic diagram of a specific implementation of the method according to an embodiment of the present invention;
fig. 7 is a first schematic diagram of the UPE structure according to the embodiment of the present invention;
fig. 8 is a schematic diagram of the UPE structure according to the embodiment of the present invention;
fig. 9 is a first schematic structural diagram of the PE according to the embodiment of the present invention;
fig. 10 is a schematic diagram of the PE structure according to the embodiment of the present invention;
fig. 11 is a first schematic structural diagram of the system according to the embodiment of the present invention;
fig. 12 is a schematic structural diagram of the system according to the embodiment of the present invention.
Detailed Description
In a specific embodiment of the ethernet packet forwarding method provided in the embodiment of the present invention, as shown in fig. 2, the following steps are performed:
step 21, receiving an ethernet message to be forwarded, wherein the ethernet message carries a control virtual local area network identifier;
step 22, determining an output port corresponding to forwarding the ethernet message according to the control virtual local area network identifier and the forwarding information;
and step 23, forwarding the ethernet packet through the egress port.
Therefore, under the condition that the message is forwarded in a unicast mode, the corresponding exit port of the forwarded Ethernet message is determined according to the Control Virtual Local Area Network (VLAN) Identification (ID) carried by the Ethernet message, namely the Control VID is the key and the related forwarding information, so that the condition that the forwarding equipment needs to learn the Media Access Control (MAC) address when forwarding the Ethernet message is avoided, and the Ethernet message forwarding efficiency of the forwarding equipment is ensured.
In a specific embodiment of the ethernet packet forwarding method provided in the embodiment of the present invention, in order to avoid that a forwarding device learns an MAC address of a User and still forwards an ethernet packet in a unicast manner, in a control plane, different control VIDs are configured for each interface on all forwarding devices, such as a User Facing Provider Edge (UPE) or a Provider Edge (PE), so as to uniquely identify different interfaces in the same Virtual Switching Instance (VSI).
It should be noted that, in order to avoid confusion, in the embodiments of the present invention, the control VID of the forwarding device, such as PE or UPE, itself is denoted by cTag, and the control VID carried in the ethernet message received by the forwarding device is denoted by fTag.
In addition, in the forwarding plane, the embodiment of the present invention changes the original ethernet packet forwarding according to the MAC address table, that is, determines the ethernet packet forwarding mode corresponding to the forwarding output port according to the MAC address and the VSI index (Vsilndex) as the key value (key), and instead, determines the ethernet packet forwarding mode corresponding to the forwarding output port according to the control VID (that is, fTag) carried in the ethernet packet sent by the remote end as the key value and other related forwarding information, and forwards the ethernet packet.
A specific implementation process of the ethernet packet forwarding method according to the embodiment of the present invention is described in detail below with reference to the accompanying drawings.
Suppose the user-side devices Router 1(Router1) and Router 2(Router1) to which the UPE belongs, and the label issued by the UPE is 200.
Then, when the router1 sends an ethernet packet to a Network operator Edge (NPE) (where VID is a control VID that is carried in the ethernet packet is 1), the method for forwarding the ethernet packet provided in the embodiment of the present invention is shown in fig. 3, where the method is run on a user operator Edge (UPE), and specifically may include:
in step 31, the UPE receives, through PORT 2(PORT ═ 2), that the router1 sends an ethernet packet carrying the control VID ═ 1.
Step 32, the UPE determines that the corresponding egress PORT is PORT1 when forwarding the ethernet packet according to control VID1 (for UPE, fTag is 1) carried in the ethernet packet and ingress PORT information used when receiving the ethernet packet, that is, PORT 2.
It should be noted that, in the embodiment of the present invention, in the process of determining an output port corresponding to forwarding the ethernet packet according to the control vlan id carried by the ethernet packet as a keyword and assisted by related forwarding information, the forwarding device may determine a port corresponding to forwarding the ethernet packet according to a correspondence relationship between forwarding information, such as a cTag or an fTag, the output port, an input port, a vsildex, an outgoing label and an incoming label of the forwarding device, which is established in advance and stored in the forwarding device.
Then, corresponding to the embodiment of the present invention, the corresponding egress PORT when forwarding the ethernet packet may be determined according to the forwarding information corresponding relationship shown in table 1 below, that is, the egress PORT is PORT 1.
TABLE 1
| Device | fTag | VsiIndex | cTag | Input port | Output port | Go out label | Go into label |
| UPE | 2 | 1 | 1 | PORT1 | PORT2 | 200 | 100 |
| UPE | 1 | 1 | 2 | PORT2 | PORT1 | 200 | 100 |
| UPE | 1 | 1 | 3 | PORT3 | PORT1 | 200 | 100 |
It should be understood that the tables listed in the embodiment of the present invention and the forwarding information corresponding relations defined by the tables are only used to clearly express the technical solutions provided by the embodiment of the present invention, but do not affect or limit the protection scope of the embodiment of the present invention.
For example, in another specific embodiment of the ethernet packet forwarding method provided in the embodiment of the present invention, forwarding information corresponding relationships shown in the following tables 2, 3, and 4 may be established and stored in the UPE in advance:
TABLE 2
| Device | fTag | VsiIndex | cTag | Input port |
| UPE | 2 | 1 | 1 | PORT1 |
| UPE | 1 | 1 | 2 | PORT2 |
| UPE | 1 | 1 | 3 | PORT3 |
TABLE 3
| Device | fTag | VsiIndex | Go out label | Output port |
| UPE | 2 | 1 | 200 | PORT2 |
| UPE | 1 | 1 | 200 | PORT1 |
| UPE | 1 | 1 | 200 | PORT1 |
TABLE 4
| Device | fTag | VsiIndex | Go into |
| UPE | |||
| 1 | 1 | 100 |
In step 32, the UPE first determines, according to the control fTag that is carried by the ethernet packet is 1 and the ingress PORT information that is PORT that is used when the ethernet packet is received, a virtual switching instance index that corresponds to fTag that is 1 in the UPE, that is, Vsilndex that is 1, according to the forwarding information corresponding relationship shown in table 2;
then, the UPE determines, according to the control vlan id carried by the ethernet packet and the determined vlan index, that is, Vsilndex is 1, an egress PORT corresponding to forwarding the ethernet packet, that is, an egress PORT is PORT1, by querying the forwarding information corresponding relationship shown in table 3.
The output port related to the embodiment of the invention can be understood as a port adopted when the Ethernet message is forwarded, the input port can be understood as a port adopted when the message is received, and meanwhile, the output port or the input port can also be replaced by an output tunnel or an input tunnel; the outgoing label according to the embodiment of the present invention may be understood as a label issued by the forwarding device itself, and the incoming label may be understood as a device label carried by the received packet.
In addition, when it needs to be described, in the process of determining the egress port corresponding to the forwarding ethernet packet according to the control VID and the forwarding information carried in the ethernet packet to be forwarded, other mature technologies in the field may also be used to implement this, which is not limited in the embodiment of the present invention.
And step 33, sending the ethernet message to be forwarded through the determined output port.
This step may further include inserting the control VID of the UPE itself, that is, the cTag is 2, and the device tag issued by the UPE, that is, the outgoing tag is 200, into the ethernet packet, and forwarding the modified ethernet packet (specifically, forwarding the modified ethernet packet to the PE).
Specifically, the UPE control VID and the device tag issued by the UPE corresponding to fTag ═ 1 carried by the received ethernet packet may be determined according to fTag ═ 1 carried by the received ethernet packet, through the forwarding information correspondence shown in table 1, or according to the forwarding information correspondence shown in tables 2 and 3.
In another specific embodiment of the ethernet packet forwarding method provided in this embodiment of the present invention, when an NPE sends an ethernet packet to a router1 (a control VID carried in the ethernet packet is 2, a control VID of a PE is 1, and an equipment tag issued by the PE is 100), the ethernet packet forwarding method provided in this embodiment of the present invention is shown in fig. 4, where the method is run on an edge device UPE of a user-side operator, and specifically may include:
in step 41, the UPE receives the ethernet packet to be forwarded, which is sent by the PE, through the ingress PORT 1(PORT 1).
Step 42, the UPE determines that the corresponding egress PORT when forwarding the ethernet packet, that is, the egress PORT is PORT2, according to the control VID2 (for UPE, that is, fTag is 2) carried in the ethernet packet and the ingress tag 100 (that is, the device tag issued by the PE) carried in the ethernet packet.
Specifically, the UPE may determine, according to fTag carried in the ethernet packet being 2 and the incoming label carried in the ethernet packet being 100, the corresponding egress PORT when forwarding the ethernet packet, that is, the egress PORT being PORT2, according to the forwarding information corresponding relationship shown in table 1 or the forwarding information corresponding relationships shown in tables 3 and 4.
And 43, the UPE sends the Ethernet message to be forwarded by adopting the determined output port.
In this step, the control VID, that is, fTag ═ 2, of the ethernet packet itself, which is carried by the ethernet packet, may also be deleted (at this time, the ethernet packet only carries the control VID ═ 1 of the PE), and the modified ethernet packet is forwarded (specifically, may be forwarded to the user side device, such as the router 1).
In a specific embodiment of the ethernet packet forwarding method provided in this embodiment of the present invention, the method is executed on an edge device PE of an operator, and assuming that a PE interface configures a control VID1 (that is, cTag is 1), the interface may process packets carrying the control VID2 and the control VID3 (that is, fTag2 and fTag3), and a tag issued by the PE is 100.
Then, when the router1 sends an ethernet packet to the NPE (the ethernet packet carries the control VID of the ethernet packet itself is 2, the control VID of the UPE is 1, and the device tag issued by the UPE is 200), the ethernet packet forwarding method provided in the embodiment of the present invention is as shown in fig. 5, and the PE specifically performs the following operations:
in step 51, the PE receives the ethernet packet to be forwarded, which is sent by the UPE, through the ingress PORT 1(PORT 1).
In step 52, the PE determines that the corresponding egress PORT when forwarding the ethernet packet, that is, the egress PORT is PORT2, according to the control VID2 (for the PE, fTag 2) carried in the ethernet packet and the ingress tag 200 (that is, the device tag issued by the UPE) carried in the ethernet packet.
Specifically, the PE may determine, according to the fTag carried in the ethernet packet being 2 and the ingress label carried in the ethernet packet being 200, the corresponding egress PORT when forwarding the ethernet packet, that is, the egress PORT is PORT2, according to the forwarding information corresponding relationship shown in the following table 5.
TABLE 5
| Device | fTag | VsiIndex | cTag | Input port | Output port | Go out label | Go into label |
| PE | 2 | 1 | 1 | PORT1 | PORT2 | 100 | 200 |
|
|
1 | 1 | 1 | PORT2 | PORT1 | 100 | 200 |
Alternatively, the PE may determine, according to fTag2 carried in the ethernet packet and the ingress label 200 carried in the ethernet packet, the corresponding egress PORT when forwarding the ethernet packet, that is, the egress PORT is PORT2, according to the forwarding information correspondence relationship shown in the following tables 7 and 8.
TABLE 6
| Device | fTag | VsiIndex | cTag | Input port |
| PE | 2 | 1 | 1 |
|
| PE | ||||
| 1 | 1 | 2 | PORT2 |
TABLE 7
| Device | fTag | VsiIndex | Go out label | Output port |
| PE | 2 | 1 | 100 |
|
| PE | ||||
| 1 | 1 | 100 | PORT1 |
TABLE 8
| Device | fTag | VsiIndex | Go into label |
| PE | 2 | 1 | 200 |
And step 53, the PE sends the Ethernet message to be forwarded by adopting the determined output port.
In this step, the control VID, that is, fTag, of the ethernet packet itself, which is carried by the ethernet packet, may also be deleted (at this time, the ethernet packet only carries the control VID of the UPE being 1), and the modified ethernet packet is forwarded (specifically, may be forwarded to a network side device, such as an NPE).
Then, in a specific embodiment of the ethernet packet forwarding method provided in this embodiment of the present invention, the method is run on an operator edge device PE, and when an NPE sends an ethernet packet to a router1 (where the ethernet packet carries a control VID of the ethernet packet itself is 1), the ethernet packet forwarding method provided in this embodiment of the present invention is as shown in fig. 6, and specifically may include:
in step 61, the PE receives the NPE through PORT 2(PORT ═ 2) and sends an ethernet packet carrying the control VID ═ 1.
Step 62, the PE determines the corresponding egress PORT when forwarding the ethernet packet, that is, the egress PORT is PORT1, according to the control VID1 (for the PE, fTag is 1) carried in the ethernet packet and the ingress PORT adopted when receiving the ethernet packet, that is, the ingress PORT is PORT 2.
Specifically, the PE may determine, according to fTag carried in the ethernet packet being 1 and the ingress PORT used when receiving the ethernet packet, that is, the ingress PORT being PORT2, and according to the forwarding information corresponding relationship shown in table 5, that the egress PORT corresponding to when forwarding the ethernet packet is PORT 1.
Or, the PE may first determine, according to fTag carried in the ethernet packet being 1 and the output PORT used when receiving the ethernet packet, that is, the output PORT being PORT2, through the corresponding relationship of the forwarding information shown in tables 6 and 7, the output PORT corresponding to when forwarding the ethernet packet, that is, the output PORT being PORT 1.
And step 63, sending the Ethernet message to be forwarded through the determined output port.
This step may further include inserting the control VID of the PE itself, that is, the cTag is 2, and the device tag issued by the PE, that is, the outgoing tag is 100, into the ethernet packet, and forwarding the modified ethernet packet (specifically, forwarding to the UPE).
Specifically, the PE control VID and the device tag issued by the PE corresponding to fTag ═ 1 carried by the received ethernet packet may be determined according to fTag ═ 1 carried by the received ethernet packet, through the forwarding information correspondence relationship shown in table 5, or according to the forwarding information correspondence relationship shown in tables 6 and 7.
As can be seen from the above description, in the ethernet packet forwarding method provided in the embodiment of the present invention, an ethernet packet to be forwarded is received, where the ethernet packet carries a control virtual local area network identifier; determining an output port corresponding to the Ethernet message to be forwarded according to the control virtual local area network identifier and the forwarding information; and forwarding the Ethernet message through the output port. Therefore, under the condition that the message is still forwarded in a unicast mode, the corresponding output port of the forwarded Ethernet message is determined according to the control virtual local area network identifier and the forwarding information carried by the Ethernet message, so that the condition that the forwarding equipment needs to learn the media access control address when forwarding the Ethernet message is avoided, and the Ethernet message forwarding efficiency of the forwarding equipment is ensured.
An embodiment of the present invention further provides a User facing provider Edge device (UPE), as shown in fig. 7, in a virtual private lan service network, the UPE may specifically include:
a receiving module 710, configured to receive an ethernet packet to be forwarded, where the ethernet packet carries a control virtual local area network identifier;
a determining module 720, configured to determine, according to the control virtual local area network identifier and the forwarding information carried in the ethernet packet received by the receiving module 710, an output port corresponding to the ethernet packet to be forwarded;
a forwarding module 730, configured to forward the ethernet packet received by the receiving module 710 through the egress port determined by the determining module 720.
In a specific embodiment of the UPE provided in the embodiment of the present invention, in order to avoid learning a Media Access Control (MAC) address of a user by the UPE and still keep forwarding an ethernet packet in a unicast manner, in a Control plane, a different Control Virtual Local Area Network (VLAN) Identifier (ID), that is, a Control VID, is configured for each interface on the UPE, and is used to uniquely identify different interfaces in the same Virtual Switch Instance (VSI).
It should be noted that, in order to avoid confusion, in the embodiment of the present invention, the control VID of the UPE itself is denoted by cTag, and for the control VID carried in the received ethernet message, it is denoted by fTag.
In addition, in the forwarding plane, the embodiment of the present invention changes the original ethernet packet forwarding according to the MAC address table, that is, determines the ethernet packet forwarding mode corresponding to the forwarding output port according to the MAC address and the VSI index (Vsilndex) as the key value (key), and instead, determines the ethernet packet forwarding mode corresponding to the forwarding output port according to the control VID (that is, fTag) carried in the ethernet packet sent by the remote end as the key value and other related forwarding information, and forwards the ethernet packet.
In a specific embodiment of the UPE provided in the embodiment of the present invention, the receiving module 710 may specifically receive an ethernet packet to be forwarded from a user side device or an operator Edge device (PE: Provider Edge). The ethernet packet carries the control VID.
In an embodiment of the UPE provided in the embodiment of the present invention, the determining module 720 may be specifically as shown in fig. 8, and includes:
the storage unit 721 is configured to store the forwarding information correspondence.
Specifically, the storage unit 721 may store forwarding information in the UPE, such as a correspondence relationship between a cTag or an fTag, an egress port, an ingress port, Vsilndex, an egress tag and an ingress tag of the forwarding device, and the like, in advance in a table. As shown in tables 1 to 8 above.
The searching unit 722 is configured to determine, according to the control VID and the forwarding information carried in the ethernet packet received by the receiving module 710, an egress port corresponding to the ethernet packet received by the forwarding receiving module 710 by searching the forwarding information correspondence table stored in the storage unit 721.
Specifically, when the ethernet packet to be forwarded received by the receiving module 710 is an ethernet packet forwarded from the ue, the searching unit 722 determines an output port corresponding to forwarding the ethernet packet by searching the forwarding information corresponding relationship, as shown in table 1, stored in the storage unit 721 according to the control vlan id carried by the ethernet packet and the ingress port information used when receiving the ethernet packet;
or,
the searching unit 722 first determines, according to the control vlan id carried in the ethernet packet and the ingress port information used when receiving the ethernet packet, a vlan instance index corresponding to the control vlan id carried in the ethernet packet by searching the forwarding information corresponding relationship shown in table 2 and stored in the storage unit 721; then, the searching unit 722 determines an output port corresponding to forwarding the ethernet packet by searching the forwarding information corresponding relationship, as shown in table 3, stored in the storage unit 721 according to the control vlan id and the determined vlan instance index carried in the ethernet packet.
When the ethernet packet to be forwarded, received by the receiving module 710, is an ethernet packet forwarded by an edge device of an operator on a network side, the searching unit 722 determines an output port corresponding to forwarding the ethernet packet by searching the forwarding information corresponding relationship, as shown in table 1, stored in the storage unit 721 according to the control virtual local area network identifier carried in the ethernet packet and the device tag of the edge device of the operator carried in the ethernet packet;
or,
the searching unit 722 first determines, according to the control vlan id carried in the ethernet packet and the device tag of the provider edge device carried in the ethernet packet, a vlan instance index corresponding to the control vlan id carried in the ethernet packet by searching the forwarding information corresponding relationship shown in table 4 and stored in the storage unit 721; then, the searching unit 722 determines an output port corresponding to forwarding the ethernet packet by searching the forwarding information corresponding relationship, as shown in table 3, stored in the storage unit 721 according to the control vlan id and the determined vlan instance index carried in the ethernet packet.
In a specific embodiment of the UPE provided in the embodiment of the present invention, the forwarding module 730 may specifically forward the ethernet packet to be forwarded, received by the receiving module 710, to the user side device or the PE through the egress port determined by the determining module 720.
Specifically, when the ethernet packet to be forwarded needs to be forwarded to the PE, the forwarding module 730 may insert the UPE control vlan id corresponding to the control vlan id carried in the ethernet packet and the device tag issued by the UPE into the ethernet packet, and send the modified ethernet packet.
When the ethernet packet to be forwarded needs to be forwarded to the ue, the forwarding module 730 may delete the control vlan id carried in the ethernet packet, and send the modified ethernet packet.
As can be seen from the above description, the UPE provided in the embodiment of the present invention receives an ethernet packet to be forwarded, where the ethernet packet carries a control virtual local area network identifier; determining an output port corresponding to the Ethernet message to be forwarded according to the control virtual local area network identifier and the forwarding information; and forwarding the Ethernet message through the output port. Therefore, under the condition that the message is still forwarded in a unicast mode, the corresponding output port of the forwarded Ethernet message is determined according to the control virtual local area network identifier and the forwarding information carried by the Ethernet message, so that the condition that the forwarding equipment needs to learn the media access control address when forwarding the Ethernet message is avoided, and the Ethernet message forwarding efficiency of the forwarding equipment is ensured.
An embodiment of the present invention further provides Provider Edge equipment (PE), as shown in fig. 9, in a virtual private local area network service network, the PE specifically includes:
a receiving module 910, configured to receive an ethernet packet to be forwarded, where the ethernet packet carries a control virtual local area network identifier;
a determining module 920, configured to determine, according to a control virtual local area network identifier and forwarding information carried in the ethernet packet received by the receiving module 910, an output port corresponding to the ethernet packet to be forwarded;
a forwarding module 930, configured to forward the ethernet packet received by the receiving module 910 through the egress port determined by the determining module 920.
In a specific embodiment of the PE provided in the embodiment of the present invention, in order to avoid that the PE learns a Media Access Control (MAC) address of a user and still keep forwarding an ethernet packet in a unicast manner, in a Control plane, a different Control Virtual Local Area Network (VLAN) Identifier (ID), that is, a Control VID, is configured for each interface on the PE to uniquely identify different interfaces in the same Virtual Switching Instance (VSI).
It should be noted that, in order to avoid confusion, the control VID of the PE itself in the embodiment of the present invention is denoted by cTag, and the control VID carried in the received ethernet message is denoted by fTag.
In addition, in the forwarding plane, the embodiment of the present invention changes the original ethernet packet forwarding according to the MAC address table, that is, determines the ethernet packet forwarding mode corresponding to the forwarding output port according to the MAC address and the VSI index (Vsilndex) as the key value (key), and instead, determines the ethernet packet forwarding mode corresponding to the forwarding output port according to the control VID (that is, fTag) carried in the ethernet packet sent by the remote end as the key value and other related forwarding information, and forwards the ethernet packet.
In a specific embodiment of the PE provided in the embodiment of the present invention, the receiving module 910 may specifically receive an ethernet packet to be forwarded from a User side operator Edge device (UPE: User Facing Provider Edge) or a Network side operator Edge device (NPE: Network Facing Provider Edge). The ethernet packet carries the control VID.
In an embodiment of the PE provided in the embodiment of the present invention, the determining module 920 may be specifically as shown in fig. 10, and includes:
and a storage unit 921 for storing the forwarding information correspondence.
Specifically, the storage unit 921 may store forwarding information in the PE, such as a correspondence relationship between a cTag or an fTag, an egress port, an ingress port, Vsilndex, an egress tag and an ingress tag of the forwarding device, in advance, in a table. As shown in tables 1 to 8 above.
The searching unit 922 is configured to determine, according to the control VID and the forwarding information carried in the ethernet packet received by the receiving module 910, an egress port corresponding to the ethernet packet received by the forwarding receiving module 910 by searching the forwarding information correspondence table stored in the storage unit 921.
Specifically, when the ethernet packet to be forwarded received by the receiving module 910 is an ethernet packet forwarded by an NPE, the searching unit 922 determines an output port corresponding to forwarding the ethernet packet by searching a forwarding information corresponding relationship, which is stored in the storage unit 921 and is shown in table 5, according to a control virtual local area network identifier carried by the ethernet packet and the input port information used when receiving the ethernet packet;
or,
the searching unit 922 first determines, according to the control vlan id carried in the ethernet packet and the ingress port information used when receiving the ethernet packet, a vlan instance index corresponding to the control vlan id carried in the ethernet packet by searching a forwarding information corresponding relationship shown in table 6 and stored in the storage unit 921;
then, the searching unit 922 determines an output port corresponding to forwarding the ethernet packet by searching the forwarding information corresponding relationship, which is stored in the storage unit 921 and is shown in table 7, according to the control vlan id and the determined virtual switch instance index carried in the ethernet packet.
When the ethernet packet to be forwarded received by the receiving module 910 is an ethernet packet forwarded by a UPE, the searching unit 922 determines an output port corresponding to forwarding the ethernet packet by searching a forwarding information corresponding relationship, as shown in table 5, stored in the storage unit 921 according to a control virtual local area network identifier carried in the ethernet packet and a device tag of the UPE carried in the ethernet packet;
or,
the searching unit 922 first determines, according to the control vlan id carried in the ethernet packet and the device tag of the UPE carried in the ethernet packet, a vlan index corresponding to the control vlan id carried in the ethernet packet by searching the forwarding information corresponding relationship shown in table 8 and stored in the storage unit 921;
then, the searching unit 922 determines an output port corresponding to forwarding the ethernet packet by searching the forwarding information corresponding relationship, which is stored in the storage unit 921 and is shown in table 7, according to the control vlan id and the determined virtual switch instance index carried in the ethernet packet.
In a specific embodiment of the PE provided in the embodiment of the present invention, the forwarding module 930 may specifically forward the ethernet packet to be forwarded, which is received by the receiving module 910, to the UPE or the NPE through the egress port determined by the determining module 920.
Specifically, when the ethernet packet to be forwarded needs to be forwarded to the UPE, the forwarding module 930 may insert the PE control vlan id corresponding to the control vlan id carried in the ethernet packet and the device tag issued by the PE into the ethernet packet, and send the modified ethernet packet.
When the ethernet packet to be forwarded needs to be forwarded to the NPE, the forwarding module 930 may delete the control vlan id carried by the ethernet packet, and send the modified ethernet packet.
As can be seen from the above description, the PE provided in the embodiment of the present invention receives an ethernet packet to be forwarded, where the ethernet packet carries a control virtual local area network identifier; determining an output port corresponding to the Ethernet message to be forwarded according to the control virtual local area network identifier and the forwarding information; and forwarding the Ethernet message through the output port. Therefore, under the condition that the message is still forwarded in a unicast mode, the corresponding output port of the forwarded Ethernet message is determined according to the control virtual local area network identifier and the forwarding information carried by the Ethernet message, so that the condition that the forwarding equipment needs to learn the media access control address when forwarding the Ethernet message is avoided, and the Ethernet message forwarding efficiency of the forwarding equipment is ensured.
As shown in fig. 11, in the virtual private lan service network, the system may specifically include a User side operator Edge device 1110 (UPE: User Facing Provider Edge) and an operator Edge device 1120 (PE: Provider Edge). Wherein:
the user-side provider edge device 1110 is configured to receive an ethernet packet to be forwarded, where the ethernet packet carries a control virtual local area network identifier, determine an egress port corresponding to forwarding the ethernet packet according to the control virtual local area network identifier and forwarding information carried by the ethernet packet, and forward the ethernet packet to the provider edge device 1120 or the user-side device through the egress port;
the provider edge device 1120 is configured to receive an ethernet packet to be forwarded, where the ethernet packet carries a control virtual local area network identifier, determine an egress port corresponding to forwarding the ethernet packet according to the control virtual local area network identifier and forwarding information carried by the ethernet packet, and forward the ethernet packet to a network side provider edge device or a user side provider edge device 1110 through the egress port.
In another specific embodiment of the ethernet packet forwarding system provided in this embodiment of the present invention, as shown in fig. 12, the system may further include:
a user side device 1130, configured to send an ethernet packet to the user side provider edge device 1110, or receive the ethernet packet forwarded by the user side provider edge device 1110;
a network side operator edge device 1140, configured to send an ethernet packet to the operator edge device 1120, or receive the ethernet packet forwarded by the operator edge device 1120.
For a specific operation process of the ethernet packet forwarding system provided in the embodiment of the present invention, please refer to the technical solutions shown in fig. 2 to 10 provided in the embodiments of the present invention, which are not described herein again.
As can be seen from the above description, in the ethernet message forwarding system provided in the embodiment of the present invention, an ethernet message to be forwarded is received, where the ethernet message carries a control virtual local area network identifier; determining an output port corresponding to the Ethernet message to be forwarded according to the control virtual local area network identifier and the forwarding information; and forwarding the Ethernet message through the output port. Therefore, under the condition that the message is still forwarded in a unicast mode, the corresponding output port of the forwarded Ethernet message is determined according to the control virtual local area network identifier and the forwarding information carried by the Ethernet message, so that the condition that the forwarding equipment needs to learn the media access control address when forwarding the Ethernet message is avoided, and the Ethernet message forwarding efficiency of the forwarding equipment is ensured.
Through the above description of the embodiments, those skilled in the art will clearly understand that the present invention may be implemented by software plus a necessary hardware platform, and certainly may be implemented by hardware, but in many cases, the former is a better embodiment. With this understanding in mind, all or part of the technical solutions of the present invention that contribute to the background can be embodied in the form of a software product, which can be stored in a storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, etc., and includes instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods according to the embodiments or some parts of the embodiments of the present invention.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (15)
1. An ethernet message forwarding method in a virtual private local area network service network, the method comprising:
receiving an Ethernet message to be forwarded, wherein the Ethernet message carries a control virtual local area network identifier;
determining an output port corresponding to the Ethernet message to be forwarded according to the control virtual local area network identifier and the forwarding information;
and forwarding the Ethernet message through the output port.
2. The method according to claim 1, wherein when the receiving the ethernet packet to be forwarded is receiving an ethernet packet forwarded from a user side, correspondingly, the determining, according to the control vlan id and the forwarding information, an egress port corresponding to forwarding the ethernet packet comprises:
the user side operator edge equipment determines an output port corresponding to the Ethernet message according to a control virtual local area network identifier carried by the Ethernet message and the input port information adopted when the Ethernet message is received;
or,
firstly, the edge device of the operator at the user side determines a virtual switching instance index corresponding to the control virtual local area network identifier carried by the Ethernet message according to the control virtual local area network identifier carried by the Ethernet message and the input port information adopted when the Ethernet message is received; and then, the user side operator edge equipment determines an output port corresponding to forwarding the Ethernet message according to the control virtual local area network identifier carried by the Ethernet message and the determined virtual switching instance index.
3. The method of claim 2, wherein forwarding the ethernet packet through the egress port comprises:
inserting the user side operator edge device control virtual local area network identifier corresponding to the control virtual local area network identifier carried by the Ethernet message and the device label issued by the user side operator edge device into the Ethernet message, and sending the modified Ethernet message.
4. The method according to claim 1, wherein when the receiving the ethernet packet to be forwarded is receiving an ethernet packet forwarded from an edge device of an operator, correspondingly, the determining, according to the control vlan id and the forwarding information, an egress port corresponding to forwarding the ethernet packet comprises:
the user side operator edge device determines to forward an output port corresponding to the Ethernet message according to a control virtual local area network identifier carried by the Ethernet message and a device label of the operator edge device carried by the Ethernet message;
or,
firstly, the user side operator edge device determines a virtual exchange instance index corresponding to the control virtual local area network identifier carried by the Ethernet message according to the control virtual local area network identifier carried by the Ethernet message and the device label of the operator edge device carried by the Ethernet message; and then, the user side operator edge equipment determines an output port corresponding to forwarding the Ethernet message according to the control virtual local area network identifier carried by the Ethernet message and the determined virtual switching instance index.
5. The method of claim 4, wherein forwarding the Ethernet packet through the egress port comprises:
and deleting the control virtual local area network identifier carried by the Ethernet message, and sending the modified Ethernet message.
6. The method according to claim 1, wherein when the receiving the ethernet packet to be forwarded is receiving an ethernet packet forwarded from a user-side operator edge device, correspondingly, the determining, according to the control vlan id and the forwarding information, an egress port corresponding to forwarding the ethernet packet comprises:
the operator edge device determines to forward an output port corresponding to the Ethernet message according to a control virtual local area network identifier carried by the Ethernet message and a device label of the user side operator edge device carried by the Ethernet message;
or,
firstly, the operator edge device determines a virtual switching instance index corresponding to the control virtual local area network identifier carried by the Ethernet message according to the control virtual local area network identifier carried by the Ethernet message and the device label of the user side operator edge device carried by the Ethernet message; and then, the edge device of the operator determines to forward an output port corresponding to the Ethernet message according to the control virtual local area network identifier carried by the Ethernet message and the determined virtual switching instance index.
7. The method of claim 6, wherein forwarding the Ethernet packet through the egress port comprises:
and deleting the control virtual local area network identifier carried by the Ethernet message, and sending the modified Ethernet message.
8. The method according to claim 1, wherein when the receiving the ethernet packet to be forwarded is receiving an ethernet packet forwarded from an edge device of a network side operator, correspondingly, the determining, according to the control vlan id and the forwarding information, an egress port corresponding to forwarding the ethernet packet comprises:
the edge device of the operator determines an output port corresponding to the forwarding of the Ethernet message according to the control virtual local area network identification carried by the Ethernet message and the input port information adopted when the Ethernet message is received;
or,
firstly, the edge device of the operator determines a virtual switching example index corresponding to the control virtual local area network identifier carried by the Ethernet message according to the control virtual local area network identifier carried by the Ethernet message and the input port information adopted when receiving the message; and then, the edge device of the operator determines to forward an output port corresponding to the Ethernet message according to the control virtual local area network identifier carried by the Ethernet message and the determined virtual switching instance index.
9. The method of claim 8, wherein forwarding the ethernet packet through the egress port comprises:
inserting the operator edge device control virtual local area network identifier corresponding to the control virtual local area network identifier carried by the Ethernet message and the device label issued by the operator edge device into the Ethernet message, and sending the modified Ethernet message.
10. A customer-side provider edge device, in a virtual private local area network service network, comprising:
the receiving module is used for receiving an Ethernet message to be forwarded, wherein the Ethernet message carries a control virtual local area network identifier;
a determining module, configured to determine, according to a control virtual local area network identifier and forwarding information carried in the ethernet packet received by the receiving module, an output port corresponding to the ethernet packet to be forwarded;
and the forwarding module is used for forwarding the Ethernet message received by the receiving module through the output port determined by the determining module.
11. The method according to claim 10, wherein when the receiving of the ethernet packet to be forwarded is receiving of an ethernet packet forwarded from a user side, the forwarding information is ingress port information used when receiving the ethernet packet, or the forwarding information is ingress port information used when receiving the ethernet packet or a virtual switch instance index corresponding to a control vlan id carried by the ethernet packet;
when the receiving of the ethernet packet to be forwarded is receiving of an ethernet packet forwarded from an operator edge device, the forwarding information is a device tag of the operator edge device carried in the ethernet packet, or the forwarding information is a device tag of the operator edge device carried in the ethernet packet or a virtual switching instance index corresponding to a control virtual local area network identifier carried in the ethernet packet.
12. An operator edge device, in a virtual private local area network service network, the device comprising:
the receiving module is used for receiving an Ethernet message to be forwarded, wherein the Ethernet message carries a control virtual local area network identifier;
a determining module, configured to determine, according to a control virtual local area network identifier and forwarding information carried in the ethernet packet received by the receiving module, an output port corresponding to the ethernet packet to be forwarded;
and the forwarding module is used for forwarding the Ethernet message received by the receiving module through the output port determined by the determining module.
13. The method according to claim 12, wherein when the receiving of the ethernet packet to be forwarded is receiving an ethernet packet forwarded from a user-side provider edge device, the forwarding information is a device tag of the user-side provider edge device carried in the ethernet packet, or the forwarding information is a device tag of the user-side provider edge device carried in the ethernet packet or a virtual switch instance index corresponding to a control virtual local area network identifier carried in the ethernet packet;
when the receiving of the ethernet packet to be forwarded is receiving of an ethernet packet forwarded from a network side operator edge device, the forwarding information is ingress port information adopted when receiving the ethernet packet, or the forwarding information is ingress port information adopted when receiving the ethernet packet or a virtual switch instance index corresponding to a control virtual local area network identifier carried by the ethernet packet.
14. An ethernet packet forwarding system, in a virtual private local area network service network, comprising a customer-side provider edge and a provider edge, wherein:
the user side operator edge device is used for receiving an Ethernet message to be forwarded, wherein the Ethernet message carries a control virtual local area network identifier, determining an output port corresponding to the Ethernet message to be forwarded according to the control virtual local area network identifier and forwarding information carried by the Ethernet message, and forwarding the Ethernet message to the operator edge device or the user side device through the output port;
the provider edge device is configured to receive an ethernet packet to be forwarded, where the ethernet packet carries a control virtual local area network identifier, determine an egress port corresponding to the ethernet packet to be forwarded according to the control virtual local area network identifier and forwarding information carried by the ethernet packet, and forward the ethernet packet to a network side provider edge device or a user side provider edge device through the egress port.
15. The system of claim 14, further comprising:
the user side equipment is used for sending an Ethernet message to the user side operator edge equipment or receiving the Ethernet message forwarded by the user side operator edge equipment;
and the network side provider edge device is used for sending the Ethernet message to the provider edge device or receiving the Ethernet message forwarded by the provider edge device.
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