CN104219146B - Method and apparatus based on ANCP label allocations in access net - Google Patents
Method and apparatus based on ANCP label allocations in access net Download PDFInfo
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- CN104219146B CN104219146B CN201310220161.7A CN201310220161A CN104219146B CN 104219146 B CN104219146 B CN 104219146B CN 201310220161 A CN201310220161 A CN 201310220161A CN 104219146 B CN104219146 B CN 104219146B
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Abstract
The present invention provides a kind of in access is netted based on ANCP come the method and apparatus of label allocation.This method includes：Obtain the LSP information of the service from the user of access net to access net, the LSP information include the access node and intermediate node on the LSP information, with the corresponding label of every physical link and the corresponding bandwidth informations of the LSP on the LSP；The access node label based on ANCP, which is generated, for the access node on the LSP configures message, access node label configuration message is used to indicate on the uplink port of the access node bandwidth shared by the LSP for configuring access node with the mapping between used label on the uplink port of the uplink port and the access node of establishing specified line attachment, access node；And access node label configuration message is sent to access node, access node is configured with indicating that access node configures message according to the access node label.
Description
Technical field
The present invention is generally related to the broadband access network communications field, more specifically, is related to a kind of base in access is netted
In access net control protocol (Access Network Control Protocol, abbreviation ANCP) come label allocation method and
Device.
Background technology
Following access net has more service architectures, and multiprotocol label switching (MPLS) is introduced into (example in access net
Such as Broadband Forum BBF (http://www.broadband-forum.org) institute in document TR-144, TR-145 and WT-178
It states).In ordinary MPLS network, data transmission is happened at label switched path (Label Switching Path, abbreviation LSP)
On, LSP information include all nodes on the LSP from source to destination information and with every physical link on LSP
Corresponding label, by using the label on LSP so that the realization of the data plane of MPLS network is relatively easy.And such as WT-
Described in 178, support the access node of MPLS that must support many and relevant control/management agreements of MPLS, for example, supporting
According to the MPLS architecture of RFC3031, support RFC5036 tag distribution protocol (Label Distribution Protocol,
Abbreviation LDP) etc., this makes the realization of the control plane of MPLS network relative complex.
In addition, software defined network (Software Defined Network, abbreviation SDN), virtualization and cloud are current
The hot issue and the much-talked-about topic in BBF of industry.The virtualization of access net is so that user can be accessed with dynamic requests by third
The different virtual access nets or different applications that side disposes in physical access network.The virtual access node of virtual access net
It is likely located on the intermediate node (such as interchanger) that some are not connected directly with access node (physics access node).Therefore, object
Reason access net allows for effectively establishing the transmission path between terminal user and desired virtual access net or application.
Invention content
Although LDP is a kind of tag distribution protocol for ordinary MPLS network, due to the logical topology of access net
It is very simple, the intermediate node usually only forwarding grouping in access net, therefore using LDP for these intermediate nodes excessively
It is complicated.In fact, being sufficient using only light weight label signaling in access is netted.
In addition, as described above, in virtual access net, physical access network allows for effectively establishing terminal user and Xi
Transmission path between the virtual access net hoped or application.Therefore business how is effectively established from line attachment to appropriate
The mapping of LSP is a challenge.Also, the discussion of the SDN in network with docking virtualization and access net heats up, it is desirable to be able to
The service new to these from entire access net visual angle controls.For example, virtually access network operation business wants to docking networking
Centralized control is carried out, is readily derived and configures best visual link with the network control element by centralization (that is, best mark
Sign switching path).
In view of the above problems, the present invention provides one kind in access is netted based on existing protocol (such as ANCP) come into rower
The method and apparatus for signing configuration.
According to an aspect of the invention, there is provided it is a kind of access net in based on ANCP come the method for label allocation.It should
Method includes：The LSP information of the service from the user of access net to access net is obtained, which includes the access on the LSP
The information of node and intermediate node, on the LSP the corresponding label of every physical link and the corresponding bandwidth of the LSP believe
Breath；The access node label based on ANCP is generated for the access node on the LSP and configures message, and access node label configuration disappears
It ceases for configuring access node to establish the uplink port and the access node of specified line attachment, access node
Mapping on uplink port between used label, and being used to indicate on the uplink port of the access node should
Bandwidth shared by LSP；And access node label configuration message is sent to access node, to indicate that access node connects according to this
Ingress label configuration message configures access node.
According to another aspect of the present invention, provide it is a kind of access net in based on ANCP come the device of label allocation.
The device includes：Acquiring unit is configured to obtain the LSP information of the service from the user of the access net to the access net,
The LSP information includes the information, corresponding with every physical link on the LSP of the access node and intermediate node on the LSP
Label and the corresponding bandwidth informations of the LSP；Label configures message generating unit, is configured to as the access on the LSP
Node generates the access node label based on ANCP and configures message, and access node label configuration message is for configuring access node
Made with establishing on specified line attachment, the uplink port of access node and the uplink port of the access node
Mapping between label, and bandwidth shared by the LSP is used to indicate on the uplink port of the access node；And hair
Unit is sent, is configured to access node label configuration message being sent to access node, to indicate access node according to this
Access node label configuration message configures access node.
According to another aspect of the present invention, provide it is a kind of in access is netted based on ANCP come the method for label allocation, packet
It includes：It receives the access node label based on ANCP and configures message, access node label configuration message is for configuring access node
With institute on the specified line attachment of foundation, the uplink port of the access node and the uplink port of the access node
Mapping between the label used, and be used to indicate on the uplink port of the access node and specify bandwidth shared by LSP；With
And based on the access node label configuration message generate forwarding table, the forwarding table indicate line attachment, uplink port and on
Correspondence on line link port between used label.
According to another aspect of the present invention, provide it is a kind of in access is netted based on ANCP come the device of label allocation, packet
It includes：Receiving unit, is configured as receiving the access node label configuration message based on ANCP, and access node label configuration disappears
Breath is for configuring access node to establish the uplink port and the access node of specified line attachment, the access node
Uplink port on mapping between used label, and be used to indicate on the uplink port of the access node
Bandwidth shared by specified LSP；And forwarding table generation unit, it is configured as turning based on access node label configuration message generation
It delivers, the correspondence on forwarding table instruction line attachment, uplink port and uplink port between used label
Relationship.
According to another aspect of the present invention, provide it is a kind of in access is netted based on ANCP come the method for label allocation, packet
It includes：It receiving the intermediate node label based on ANCP and configures message, intermediate node label configuration message is used to configure intermediate node,
To establish inbound port of the specified services at the intermediate node, enter the mapping between label, exit port and outgoing label, and it is used for
Indicate bandwidth shared by specific LSP on corresponding port；And forwarding table, the forwarding are generated based on intermediate node label configuration message
Table indicates inbound port of the specified services at the intermediate node, enters the correspondence between label, exit port and outgoing label.
According to another aspect of the present invention, provide it is a kind of in access is netted based on ANCP come the device of label allocation, packet
It includes：Receiving unit, is configured as receiving the intermediate node label configuration message based on ANCP, and intermediate node label configuration disappears
Breath is for configuring intermediate node, to establish inbound port of the specified services at the intermediate node, enter label, exit port and outgoing label
Between mapping, and be used to indicate on corresponding port bandwidth shared by specific LSP；And forwarding table generation unit, it is configured
Message generation forwarding table is configured to be based on the intermediate node label, which indicates the specified services at the intermediate node
Inbound port, enter correspondence between label, exit port and outgoing label.
Using the solution of the present invention, can realize simple label configuration in access is netted, and can to label distribution into
Row centralized control.
Description of the drawings
It, will be more preferable geographical after description by the specific implementation mode below with reference to the present invention given by following drawings
The solution present invention, and other objects of the present invention, details, features and advantages will become apparent.In the accompanying drawings：
Fig. 1 shows the schematic diagram of more service architectures using ANCP；
Fig. 2 shows according to embodiment of the present invention in access is netted based on ANCP come the signaling of the method for label allocation
Figure；
Fig. 3 shows that the label based on ANCP according to embodiment of the present invention configures the schematic diagram of the format of message；
Fig. 4 A and 4B are respectively illustrated configures message according to the access node label based on ANCP of embodiment of the present invention
The schematic diagram of the format of message is configured with intermediate node label；
Fig. 5 show according to embodiment of the present invention access net in based on ANCP come the box of the device of label allocation
Figure；
Fig. 6 show according to the embodiment of the present invention for access net in based on ANCP come the another of label allocation
The block diagram of one device；And
Fig. 7 show according to the embodiment of the present invention for access net in based on ANCP come label allocation again
The block diagram of one device.
Wherein, in all the appended drawings, same or analogous label indicates there is identical, similar or corresponding feature or work(
Energy.
Specific implementation mode
The preferred embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Preferred embodiment, however, it is to be appreciated that may be realized in various forms the disclosure without the embodiment party that should be illustrated here
Formula is limited.On the contrary, these embodiments are provided so that the disclosure is more thorough and complete, and can be by the disclosure
Range is completely communicated to those skilled in the art.
Currently, the Access Node Control Protocol defined in Internet Engineering Task group (IETF) RFC 6320
ANCP, the network access server (Network Access Server, abbreviation NAS) in more service architectures and access section
It is worked between point to execute and service quality, service and the relevant operation of subscriber.Corresponding framework BBF (TR-147,
WT-207 defined in).
Fig. 1 shows the schematic diagram of more service architectures 100 using ANCP.As shown in fig. 1, more service architectures 100 wrap
One or more physics access node (hereinafter referred to as access node) AN 102, AN 104 are included, one or more intermediate nodes are (such as
Interchanger) 106,108, wideband network gateway (BNG) 110, certification, authorization and accounting (AAA) server 112.In addition, more clothes
It is engaged in framework 100 further including one or more users, such as user 1, user 2, user 3.In some instances, more service architectures
100 further include one or more Virtual Network Operator (VNO) or apply 114.
In an example, user 1 desires access to the service of VNO 114, therefore should establish user 1 and exist to VNO 114
The connection between virtual access node (such as intermediate node 108) in physical access network.
In BNG 110, access node/optical line terminal is controlled using ANCP agreements.ANCP is a kind of simple association
View, the network element of the access node for being used to control in access net and other supports ANCP, it can be considered to pass through extension
ANCP carrys out in access is netted to realize label configuration.
Fig. 2 shows according to embodiment of the present invention in access is netted based on ANCP come the method 200 of label allocation
Signaling diagram.Hereinafter, with reference to the schematic diagram of figure 1, method 200 is described in conjunction with verification process, however those skilled in the art
It is understood that label configuration method of the present invention is not limited to the environment described in Fig. 2, but can be in other environment
Middle realization, for example, can be realized in conjunction with digital subscriber line (DSL) Topology Discovery process.
When user 1 asks the service of VNO 114, user initiates certification request (step 202) first, the certification request packet
Include user certificate and the identifier etc. of requested VNO.
BNG 110 explains the certification request and sends corresponding access request (step 204) to aaa server 112.Ability
Field technique personnel are appreciated that certification request can also be transmitted directly to AAA by BNG 110 or by access node AN102
Server 112.
In step 206, aaa server 112 returns to access response to BNG 110, and instruction receives the access request of user 1.
A kind of embodiment according to the present invention, access response include LSP information of the user 1 to the virtual access node of VNO 114,
The LSP information includes the information, corresponding with every physical link on the LSP of the access node and intermediate node on the LSP
Label and the corresponding bandwidth informations of the LSP.
After receiving access response, more specifically, after receiving the LSP information, in BNG 110
ANCP servers are that the access node AN 102 on the LSP generates the access node label configuration message (step based on ANCP
S208)。
Fig. 3 shows that the label based on ANCP according to embodiment of the present invention configures the schematic diagram of the format of message.Such as
Shown in Fig. 3, is configured for label to be extended to conventional ANCP message, need to define new type of message.For example,
Type of message Type_Label_Configuration that can be new defined in " type of message " field of ANCP message is to refer to
Show that the ANCP message is the ANCP message configured for label.
It is to configure for access node label or configured for intermediate node label according to the ANCP message extended, it can
The label based on ANCP further to define two kinds of subtypes configures message.For example, can be by by the ANCP message in Fig. 3
" subtype " field be set as " 0 " indicate the ANCP message be for access node carry out label configuration access node
Label configures message, sets " subtype " field to " 1 " to indicate that the ANCP message is for being marked to intermediate node
The intermediate node label of label configuration configures message.It will be appreciated by those skilled in the art that the present invention is not limited thereto, and
It is can be configured to the subtype of the ANCP message by other arbitrary differentiable modes to indicate access node label
It configures message and intermediate node label configures message.
Fig. 4 A show that the access node label based on ANCP according to embodiment of the present invention configures the format of message
Schematic diagram.In the present invention, access node label configuration message is for configuring access node, to establish specified line attachment
The uplink port (i.e. the network-side port of access node) of (that is, user-side port of access node), access node and
Mapping on the uplink port of access node between used label, and being used to indicate on uplink port should
Bandwidth shared by LSP.Note that for simplicity, the schematic diagram of the access node label configuration message in Fig. 4 A is omitted such as figure
TCP/IP encapsulation headers part and the heads ANCP shown in 3 point.
As shown in Figure 4 A, the field in access node label configuration message for label configuration includes：Subclass type-word
Section, length field, line attachment identification field, LSP label field and LSP bandwidth fields etc..
For access node label configuration message, it is somebody's turn to do " subtype " field and for example can be set to
“0”。
Length field is used to indicate the total length of the field for label configuration in access node label configuration message.
Line attachment identification field is used to identify the line attachment of access node.It is, for example, possible to use existing ANCP agreements
Defined in Access-Loop-Circuit-ID or Access-Loop-Remote-ID identify line attachment.
LSP label field is used to indicate used mark on the uplink port (i.e. network-side port) of access node
Label.
LSP bandwidth fields are used to indicate the bandwidth for the business for distributing to the line attachment.Access node is believed using the bandwidth
It ceases to dispatch the business on the uplink port between the different LSP at access node.
For example, in realization method shown by Fig. 4 A, for the length field in the field of label configuration value=connect
The length+12 for entering line identification field, as unit of byte.Herein, 12 be son included in the field configured for label
The total length of type field, length field, reserved field, LSP label field and LSP bandwidth fields, as unit of byte.
With return reference to Fig. 2, the ANCP servers in BNG 110 produce the configuration of the access node label based on ANCP
After message (step S208), generated access node label configuration message is sent to 102 (steps of access node AN
S210)。
After access node AN 102 receives the access node label configuration message based on ANCP of the transmissions of BNG 110,
Message is configured according to the access node label to configure access node AN 102, to establish line attachment, access node
Uplink port and access node uplink port on mapping between used label, and set uplink
Bandwidth (step S212) shared by the LSP in link port.Specifically, access node AN102 is according in " type of message " field
Content (such as type of message be Type_Label_Configuration) determine that received message is that label configuration disappears
Breath, and further determine that the message is for being saved to access according to the information (such as subtype is " 0 ") in " subtype " field
The access node configuration message that point is configured, then exists to specified services according to the information in the payload portions of the message
Label at the access node is configured, to establish on instruction line attachment, uplink port and uplink port
The forwarding table of correspondence between used label simultaneously stores it.
After the label configuration process of the present invention terminates, when access node AN 102 is received from specified line attachment
Ul data packet when, by searching for the forwarding table stored, which is forwarded to and the line attachment
Corresponding uplink port is used in combination the corresponding label in forwarding table that the packet is marked.
Alternatively, after the label configuration process of the present invention terminates, when access node AN 102 passes through specified uplink
When road port receives packet, the label entrained by the packet is removed, and by searching for the forwarding table stored,
The packet is forwarded to line attachment corresponding with the uplink port.
After access node AN 102 is successfully made label configuration (step S212), ANCP is sent to BNG 110
Response is to indicate that the configuration of the label in the access node is successfully completed (step S214).
In some cases, such as when user desires access to the virtual access net that third party disposes in physical access network
When, it needs to establish the transmission path between user and the virtual access node of the virtual access net, and virtual access node may
On the intermediate node (such as intermediate node 108 in Fig. 1) not being connected directly with physics access node positioned at some.At this point, also
It needs to configure the label on all intermediate nodes on LSP.
In this case, after receiving access response (step S206), more specifically, this is being received
After LSP information, the ANCP servers in BNG 110 are also that the intermediate node on the LSP generates the intermediate node based on ANCP
Label configures message (step S208 ').
Fig. 4 B show that the intermediate node label based on ANCP according to embodiment of the present invention configures the format of message
Schematic diagram.In the present invention, intermediate node label configuration message be used to configure on LSP intermediate node (including destination node,
That is the virtual access node of the desired VNO accessed of user), intermediate node 106 and intermediate node 108 as shown in Figure 1,
To establish inbound port of the specified services at the intermediate node, enter the mapping between label, exit port and outgoing label, and indicate
Bandwidth shared by the LSP on corresponding port.Note that, the schematic diagram of intermediate node label configuration message in Fig. 4 B similar with Fig. 4 A
TCP/IP encapsulation headers as shown in Figure 3 part and the heads ANCP point is omitted.
As shown in Figure 4 B, the field in intermediate node label configuration message for label configuration includes：Subclass type-word
Section, inbound port id field, enters label field, exit port id field, outgoing label field and LSP bandwidth fields etc. at length field.
For intermediate node label configuration message, it is somebody's turn to do " subtype " field and for example can be set to
“1”。
Length field is used to indicate the total length of the field for label configuration in intermediate node label configuration message.
Inbound port id field is used to indicate the identifier of the inbound port of the intermediate node.
Enter label field and is used to indicate the label for being used for the business on the inbound port of the intermediate node.
Exit port id field is used to indicate the identifier of the exit port of the intermediate node.
Outgoing label field is used to indicate the label that the business is used in the exit port of the intermediate node.
LSP bandwidth fields are used to indicate the bandwidth that the business is distributed on the LSP.Intermediate node can be believed using the bandwidth
It ceases to dispatch the business in exit port between difference LSP.
For example, in realization method shown by Fig. 4 B, the value of length field could be provided as 16 bytes.Herein, 16 are
For sub-type field included in the field of label configuration, length field, reserved field, inbound port id field, enter label
The total length of field, exit port id field, outgoing label field and LSP bandwidth fields, as unit of byte.
In one embodiment, when intermediate node is virtual access node (the i.e. purpose for the VNO that user wants to connect to
Ground node, such as intermediate node 108 shown in Fig. 1) when, by the intermediate node label configure message exit port id field and
Outgoing label field is set as empty (NULL).Alternatively, it is also possible to which exit port id field and outgoing label field are set as arbitrary
It can indicate the invalid value of the field, it might even be possible to omit exit port id field and outgoing label field.
With return reference to Fig. 2, the ANCP servers in BNG 110 generate the intermediate node label configuration based on ANCP and disappear
After ceasing (step S208 '), generated intermediate node label configuration message is sent to institute in intermediate node, such as Fig. 1
The intermediate node 106 or intermediate node 108 (step S210 ') shown.
After intermediate node receives the intermediate node label configuration message based on ANCP of the transmissions of BNG 110, according to this
Intermediate node label configuration message pair intermediate node is configured, and enters end at the intermediate node to establish specified services
Mouthful, enter mapping between label, exit port and outgoing label, and set bandwidth (step shared by specific LSP on corresponding port
S212’).Specifically, intermediate node according in " type of message " field information (such as type of message be Type_Label_
Configuration) determine that received ANCP message is label configuration message, and further according in " subtype " field
Information (such as subtype be " 1 ") determine that the message is that intermediate node for being configured to intermediate node configures message,
Then label of the specified services at the intermediate node is configured according to the information in the payload portions of the message, from
And instruction inbound port is established, enters the forwarding table of correspondence between label, exit port and outgoing label and it is stored.
After the label configuration process of the present invention terminates, when intermediate node receives packet from some inbound port
When, by searching for the forwarding table stored, which is sent out by exit port corresponding with the inbound port, is used in combination and turns
Corresponding outgoing label in delivering replaces the packet and entrained enters label from inbound port into fashionable.
After the intermediate node is successfully made label configuration, ANCP responses are sent to indicate in this to BNG 110
Label configuration in intermediate node is successfully completed (step S214 ').
In general, user is to the LSP between the virtual access node (intermediate node 108 as shown in Figure 1) of desired VNO
May include multiple intermediate nodes (intermediate node 106 and intermediate node 108 as shown in Figure 1), BNG 110 is by being each
Intermediate node is parallel or executes step S208 '-S214 ' successively to match to label of the specified services at each intermediate node
It sets.
When BNG 110 receives the ANCP responses for indicating successfully configuration from access node and each intermediate node,
Certification success message (S216) is sent to user.
So far, the virtual chain being successfully established between user and its desirable VNO (i.e. the virtual access node of VNO)
Road.
Above in conjunction with step S208-S214 and step S208 '-S214 ' to access node label configuration process and middle node
Point label configuration process is described successively, it will be appreciated by those skilled in the art that the present invention is not limited thereto, and
It is the access node label configuration process that can only execute step S208-S214, alternatively, can sequentially be held parallel or with other
The two processes of row.
In addition, in the above description, BNG 110 receives LSP information from aaa server 112, however the present invention is not
It is confined to this, BNG 110 can obtain the LSP information in any way, for example, can be arranged in BNG 110 in advance specified
The LSP information of business.
In addition, in the above description, the forwarding table of two kinds of formats is described for access node and intermediate node, however
The present invention is not limited thereto.It will be understood by those skilled in the art that the lattice for the forwarding table that access node and intermediate node are established
Formula can be identical, for access node, can set inbound port id field to corresponding line attachment identifier,
And label will be entered and be set as empty.
Fig. 5 show according to the embodiment of the present invention for access net in based on ANCP come the device of label allocation
500 block diagram.Device 500 for example may be implemented to realize in the ANCP servers in BNG 110 or by ANCP servers.So
And the present invention is not limited thereto, device 500 can be realized by can arbitrarily support the network controls element of ANCP agreements.
As shown, device 500 includes：Acquiring unit 510 is configured to obtain from the user of access net to access net
Service LSP information, the LSP information include the access node and intermediate node on LSP information, with LSP on every object
Manage the corresponding label of link and the corresponding bandwidth informations of the LSP；Label configures message generating unit 520, is configured to
The access node label based on ANCP is generated for the access node on the LSP and configures message, which configures message
For configuring access node to establish the uplink port and the access node of specified line attachment, access node
Mapping on line link port between used label, and being used to indicate on the uplink port of the access node should
Bandwidth shared by LSP；And transmission unit 530, it is configured to access node label configuration message being sent to access node,
The label at access node is configured with indicating that access node configures message according to the access node label.
In one embodiment, label configuration message generating unit 520 is also configured to as the intermediate node on the LSP
It generates the intermediate node label based on ANCP and configures message, intermediate node label configuration message is in configuring on the LSP
Intermediate node, to establish inbound port of the specified services at the intermediate node, enter the mapping between label, exit port and outgoing label,
And bandwidth shared by the LSP is used to indicate on corresponding port.In this embodiment, transmission unit 530 be also configured to by
Intermediate node label configuration message is sent to intermediate node, to indicate that intermediate node configures message according to the intermediate node label
Intermediate node is configured.
In one embodiment, access node label configuration message includes：Tie-in line for identifying access node
The line attachment identification information on road, the LSP label letter for being used to indicate used label on the uplink port of access node
Cease and be used to indicate the business for distributing to line attachment bandwidth LSP bandwidth informations.
In one embodiment, intermediate node label configuration message includes being used to indicate the inbound port of intermediate node
The inbound port id information of identifier, the label being used to indicate on the inbound port of intermediate node for the business enter label information,
And it is used to indicate the LSP bandwidth informations for the bandwidth that the business is distributed on the LSP.
In one embodiment, such as when intermediate node is not destination node, intermediate node label configuration disappears
Breath further includes the exit port id information of the identifier for the exit port for being used to indicate the intermediate node and is used to indicate the intermediate node
Exit port on for the business label outgoing label information.
Fig. 6 show according to the embodiment of the present invention for access net in based on ANCP come the another of label allocation
The block diagram of one device 600.Device 600 for example may be implemented in access node (access node AN102 as shown in Figure 1)
Or it is realized by access node.
As shown, device 600 includes receiving unit 610, it is configured as receiving the access node label based on ANCP
Message is configured, access node label configuration message is for configuring access node to establish specified line attachment, the access section
Mapping on the uplink port of point and the uplink port of the access node between used label, and be used for
It indicates to specify bandwidth shared by LSP on the uplink port of the access node.Device 600 further includes forwarding table generation unit
620, it is configured as generating forwarding table based on access node label configuration message, which indicates line attachment, uplink
Correspondence in link port and uplink port between used label.
In one embodiment, device 600 further includes transmission unit 630, is configured as working as receiving to come from and specify
When the ul data packet of line attachment, by searching for the forwarding table, which is forwarded to and the specified access
The corresponding uplink port of circuit is used in combination the corresponding label in the forwarding table that the packet is marked；And also
It is configured as removing the label entrained by the packet when receiving packet by specific uplink port, and
The packet is forwarded to line attachment corresponding with the uplink port by searching for the forwarding table.
Fig. 7 show according to the embodiment of the present invention for access net in based on ANCP come label allocation again
The block diagram of one device 700.Device 700 for example may be implemented in intermediate node (intermediate node (such as exchange as shown in Figure 1
Machine) 106 or 108) in or realized by intermediate node.
As shown, device 700 includes receiving unit 710, it is configured as receiving the intermediate node label based on ANCP
Message is configured, intermediate node label configuration message is for configuring intermediate node, to establish specified services at the intermediate node
Inbound port, enter mapping between label, exit port and outgoing label, and be used to indicate on corresponding port band shared by specific LSP
It is wide.Device 700 further includes forwarding table generation unit 720, is configured as turning based on intermediate node label configuration message generation
It delivers, which indicates inbound port of the specified services at the intermediate node, enters between label, exit port and outgoing label
Correspondence.
In one embodiment, device 700 further includes transmission unit 730, is configured as working as receiving to come from and specify
When the packet of inbound port, by searching for the forwarding table, which is forwarded to outlet corresponding with the inbound port
Mouthful, it is used in combination the corresponding outgoing label in the forwarding table to replace the packet and entrained enters label from the inbound port into fashionable.
Scheme according to the present invention configures message by the way that the access node label based on ANCP is arranged, can realize dynamic
User's attach process uplink port (i.e. network is connected to the specified line attachment on the user port by access node
Side ports) on correct LSP.
In addition, scheme according to the present invention, is matched with docking the node in networking into row label by being extended to ANCP
It sets, can realize simple label configuration, and centralized control can be carried out to label distribution.In this way, net is accessed
Operator come dynamic control access node and intermediate node (such as interchanger) with unified control platform and no longer need
Complicated LDP is realized in the access node of access net and intermediate node.
Here, method disclosed herein is described with reference to attached drawing.It should be appreciated, however, that shown in attached drawing and
Sequence of steps described in this description is only schematical, without departing from the scope of the claims, these sides
Method step and/or action can be executed and be not limited to shown in attached drawing and described in the specification in a different order
Particular order.
In one or more exemplary designs, this can be realized with hardware, software, firmware or their arbitrary combination
The application function.If realized with software, can be stored the function as one or more instruction or code
On a computer-readable medium, or as on computer-readable medium one or more instructions or code transmit.It calculates
Machine readable medium includes computer storage media and communication media, and wherein communication media includes contributing to computer program from one
Place is transmitted to the arbitrary medium of another place.Storage medium can be general or specialized computer-accessible arbitrary available
Medium.This computer-readable medium may include, such as, but not limited to, RAM, ROM, EEPROM, CD-ROM or other CD
Storage device, disk storage equipment or other magnetic storage apparatus, either can be used for general or specialized computer or it is general or
The form of the addressable instruction of application specific processor or data structure come code modules desired by carrying or store it is arbitrary its
Its medium.Also, it is arbitrary to connect the computer-readable medium that be known as.For example, if software be using coaxial cable,
The wireless technology of optical fiber cable, twisted-pair feeder, DSL or such as infrared ray, radio and microwave etc come from website, server or its
The transmission of its remote source, then coaxial cable, optical fiber cable, twisted-pair feeder, DSL or such as infrared ray, radio and microwave etc
Wireless technology be also included in the definition of medium.
General processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), field programmable gate can be used
Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components or for executing sheet
The arbitrary combination of function described in text come realize or execute various illustrative logical blocks, module in conjunction with described in the disclosure and
Circuit.General processor can be microprocessor, alternatively, processor can also be any conventional processor, controller, micro-control
Device or state machine processed.Processor can also be embodied as the combination of computing device, for example, DSP and microprocessor combine, are multiple
Microprocessor, the combination of one or more microprocessors and DSP core or any other such structure.
Those of ordinary skill in the art should also understand that, the various illustrative logics described in conjunction with embodiments herein
Electronic hardware, computer software or combination may be implemented into block, module, circuit and algorithm steps.In order to understand earth's surface
Show this interchangeability between hardware and software, various illustrative components, block, module, circuit and step are enclosed above
General description has been carried out around its function.It is implemented as hardware as this function and is also implemented as software, depends on specific
Using and apply design constraint over the whole system.Those skilled in the art can be directed to each specific application, to become
Logical mode realizes described function, and still, this realization decision should not be interpreted as causing a departure from the scope of this disclosure.
The above description of the disclosure is for enabling any those of ordinary skill of this field to realize or use the present invention.It is right
For those of ordinary skill in the art, the various modifications of the disclosure will be apparent from, and generality defined herein
Principle can also be applied to other deformations in the case of without deviating from the spirit and scope of the disclosed invention.Therefore, the present invention is simultaneously
It is not limited to example as described herein and design, but it is consistent with the widest scope of principle disclosed herein and novel features.
Claims (12)
1. it is a kind of in access is netted based on accessing net control protocol (ANCP) come the method for label allocation, including：
Obtain the mark of the virtual access node of the Virtual Network Operator (VNO) from the user of the access net to the access net
Switching path (LSP) information is signed, the virtual access node is located in access net not to be connected directly with physics access node
Intermediate node on, the LSP information include the physics access node and intermediate node on the LSP information, with the LSP
On the corresponding label of every physical link and the corresponding bandwidth informations of the LSP；
The access node label based on ANCP, which is generated, for the physics access node on the LSP configures message, the access node
Label configuration message is used to configure the physics access node to establish specified line attachment, the physics access node
Mapping on the uplink port of line link port and the physics access node between used label, and for referring to
Show bandwidth shared by the LSP on the uplink port of the physics access node；
Be that intermediate node on the LSP generates the intermediate node label based on ANCP and configures message, the intermediate node not with
The physics access node is connected directly, and the intermediate node label configuration message is used to configure the intermediate node on the LSP,
To establish inbound port of the specified services at the intermediate node, entering label, exit port and be used for the business for the business
Outgoing label between mapping, and be used to indicate the bandwidth that the business is distributed on the LSP；And
The access node label is configured into message and intermediate node label configuration message is sent respectively to the physics and connects
Ingress and the intermediate node, to indicate that the physics access node configures message to described according to the access node label
Physics access node is configured, the intermediate node according to the physical node label configure message to the intermediate node into
Row configuration.
2. the method as described in claim 1, wherein access node label configuration message includes：For identifying the physics
The line attachment identification information of the line attachment of access node is used to indicate on the uplink port of the physics access node
The LSP label information of used label and be used to indicate the business for distributing to the line attachment bandwidth LSP bandwidth
Information.
3. the method as described in claim 1, wherein intermediate node label configuration message includes being used to indicate the centre
The inbound port id information of the identifier of the inbound port of node is used to indicate on the inbound port of the intermediate node for described
The label of business enters label information, and is used to indicate the LSP bandwidth letter for the bandwidth that the business is distributed on the LSP
Breath.
4. method as claimed in claim 3, wherein when the intermediate node is not destination node, the intermediate node mark
Label configuration message further includes the exit port id information of the identifier for the exit port for being used to indicate the intermediate node and is used to indicate
Outgoing label information in the exit port of the intermediate node for the label of the business.
5. it is a kind of in access is netted based on accessing net control protocol (ANCP) come the device of label allocation, including：
Acquiring unit is configured to obtain from the user of the access net to the Virtual Network Operator of the access net
(VNO) label switched path (LSP) information of virtual access node, the virtual access node are located in access net not
On the intermediate node being connected directly with physics access node, the LSP information include physics access node on the LSP and in
The information of intermediate node, with the corresponding label of every physical link and the corresponding bandwidth informations of the LSP on the LSP；
Label configures message generating unit, is configured to generate connecing based on ANCP for the physics access node on the LSP
Ingress label configures message, and the access node label configuration message is specified to establish for configuring the physics access node
Line attachment, institute on the uplink port of the physics access node and the uplink port of the physics access node
Mapping between the label used, and band shared by the LSP is used to indicate on the uplink port of the physics access node
Width, and label configuration message generating unit is also configured to generate based on ANCP's for the intermediate node on the LSP
Intermediate node label configures message, and the intermediate node is not connected directly with the physics access node, the intermediate node mark
Label configuration message is used to configure intermediate node on the LSP, with establish inbound port of the specified services at the intermediate node,
Entering label, exit port and for the mapping between the outgoing label of the business, and be used to indicate on the LSP point for the business
The bandwidth of the dispensing business；And
Transmission unit is configured to the access node label configuring message and intermediate node label configuration message point
It is not sent to the physics access node, to indicate that the physics access node configures message pair according to the access node label
The physics access node is configured, and the intermediate node configures message to the middle node according to the physical node label
Point is configured.
6. device as claimed in claim 5, wherein access node label configuration message includes：For identifying the physics
The line attachment identification information of the line attachment of access node is used to indicate on the uplink port of the physics access node
The LSP label information of used label and be used to indicate the business for distributing to the line attachment bandwidth LSP bandwidth
Information.
7. device as claimed in claim 5, wherein intermediate node label configuration message includes being used to indicate the centre
The inbound port id information of the identifier of the inbound port of node is used to indicate on the inbound port of the intermediate node for described
The label of business enters label information, and is used to indicate the LSP bandwidth letter for the bandwidth that the business is distributed on the LSP
Breath.
8. device as claimed in claim 7, wherein when the intermediate node is not destination node, the intermediate node mark
Label configuration message further includes the exit port id information of the identifier for the exit port for being used to indicate the intermediate node and is used to indicate
Outgoing label information in the exit port of the intermediate node for the label of the business.
9. it is a kind of in access is netted based on accessing net control protocol (ANCP) come the method for label allocation, including：
It receives the intermediate node label based on ANCP and configures message, the intermediate node label configuration message is for configuring middle node
Point, to establish inbound port of the specified services at the intermediate node, entering label, exit port and be used for the business for the business
Outgoing label between mapping, and be used to indicate the bandwidth that the business is distributed on specific label switching path (LSP), wherein
Physics access node of the intermediate node not with the access net is connected directly, and the wherein described LSP is from the access net
User to the access net Virtual Network Operator (VNO) virtual access node, and the virtual access node position
On the intermediate node not being connected directly with the physics access node in the access net；And
Forwarding table is generated based on intermediate node label configuration message, which indicates the specified services in the centre
Inbound port at node enters correspondence between label, exit port and outgoing label.
10. method as claimed in claim 9, further includes：
When receiving the packet from specified inbound port, by searching for the forwarding table, the packet is forwarded
To exit port corresponding with the inbound port, the corresponding outgoing label in the forwarding table is used in combination to replace the packet from institute
It states inbound port and entrained enters label into fashionable.
11. it is a kind of in access is netted based on accessing net control protocol (ANCP) come the device of label allocation, including：
Receiving unit, is configured as receiving the intermediate node label configuration message based on ANCP, and the intermediate node label is matched
Message is set for configuring intermediate node, to establish inbound port of the specified services at the intermediate node, enter mark for the business
Label, exit port and for the mapping between the outgoing label of the business, and be used to indicate on specific label switching path (LSP) point
The bandwidth of the dispensing business, wherein physics access node of the intermediate node not with the access net is connected directly, and its
Described in LSP from it is described access net user to it is described access net Virtual Network Operator (VNO) virtual access node, and
And the virtual access node is located on the intermediate node not being connected directly with the physics access node in the access net；With
And
Forwarding table generation unit is configured as generating forwarding table, the forwarding table based on intermediate node label configuration message
It indicates inbound port of the specified services at the intermediate node, enter the correspondence between label, exit port and outgoing label.
12. device as claimed in claim 11, further includes：
Transmission unit is configured as when receiving the packet from specified inbound port, by searching for the forwarding table,
The packet is forwarded to exit port corresponding with the inbound port, the corresponding outgoing label in the forwarding table is used in combination to replace
It changes the packet and entrained enters label from the inbound port into fashionable.
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