CN105991390B - A method of realizing the VPLS for returning connection in DOCSIS/DPoE network more - Google Patents
A method of realizing the VPLS for returning connection in DOCSIS/DPoE network more Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/2854—Wide area networks, e.g. public data networks
- H04L12/2856—Access arrangements, e.g. Internet access
- H04L12/2858—Access network architectures
- H04L12/2861—Point-to-multipoint connection from the data network to the subscribers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/66—Layer 2 routing, e.g. in Ethernet based MAN's
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Abstract
The present invention provides the method that the Virtual Private LAN Service for returning connection based on BGP are realized in a kind of provider edge router of DOCSIS/DPoE network more, including step: obtaining cable modem configuration files from the configuration server of backstage, wherein, the configuration file includes bgp attribute subtype length value；Believe modern parameter according to the bgp attribute subtype length value configuration BGP for returning connection more；Pseudo-wire is created and safeguards according to the BGP signaling parameters for returning connection, thus with establishing and safeguarding the Virtual Private LAN Service for returning connection based on BGP in network between other provider edge routers more more.Wherein, include: that BGP returns connection configuration subtype in the bgp attribute subtype length value more, be used to configure the special parameter item in BGP signaling parameter needed for realizing the Virtual Private LAN Service for returning connection based on BGP more.In addition, the invention also provides the methods for automatically configuring routing differentiation parameter and route target parameter.
Description
Technical field
The present invention relates to the communications fields, in particular it relates to a kind of Provider Edge road of DOCSIS/DPoE network
Method by realizing the Virtual Private LAN Service (VPLS) for returning connection based on BGP in device more.
Background technique
Cable laboratory's (cable television laboratory), DOCSIS (data-over-cable service interface specification) and DPoE (EPON rule
The DOCSIS of model is configured) specification support configuration support BGP-AD on CMTS (wired demodulator terminal system) or DPoE system
LDP (Label Distribution Protocol) Virtual Private LAN Service and BGP virtual private local of (Border Gateway Protocol-is found automatically)
Network service.In order to support these characteristics, cable laboratory has given a definition bgp attribute subclass in L2VPN coding TLV (43.5)
Type length value (BGP Attribute Sub TLV) (43.5.21) is to encode boundary net required by RFC6074 or RFC4761
Close protocol signaling parameter.
However, the definition of the sub- TLV of bgp attribute (43.5.21) is only supported to dispose VPLS in its simplest form at present
Service.In addition to simplest model, MSO (multisystem operator) market also requires more flexible and reliable VPLS deployment model.
For example, ietf standard Virtual Private LAN Service returns connection (IETF standard VPLS multi-homing) scheme more
Be business services market most it is desirable that deployment model.
The present invention attempts to expand the DOCSIS/DPoE definition of the existing standard of TLV (43.5.21) sub- for bgp attribute, with
The deployment of the Virtual Private LAN Service schemes for returning connection based on IETF BGP of support more.
Summary of the invention
In order to achieve the object of the present invention, the first aspect of the present invention provides a kind of operation of DOCSIS/DPoE network
The method that the Virtual Private LAN Service for returning connection based on BGP are realized in quotient's edge router more, including step: from
Cable modem configuration files are obtained in the configuration server of backstage, wherein the configuration file includes bgp attribute subtype
Length value；According to the bgp attribute subtype length value configuration BGP signaling parameters for returning connection more；Return connection according to described more
BGP signaling parameter creation and maintenance pseudo-wire, thus in network between other provider edge routers establish and safeguard base
In the Virtual Private LAN Service for returning connection of BGP more.
Particularly, include: that BGP returns connection configuration subtype in the bgp attribute subtype length value more, be used to configure
Special parameter item in BGP signaling parameter needed for realizing the Virtual Private LAN Service for returning connection based on BGP more.
Particularly, it includes following subtype length value that the BGP returns connection configuration subtype more: returning connection site identity more
Subtype length value is used to configure return more and connects site identity parameter, to indicate the mark of the customer edge for returning connection more
Know.
Particularly, it further includes at least one in following multiple subtype length values that the BGP returns connection configuration subtype more
: Route Area molecule type length value is used to configure routing differentiation parameter to distinguish different Virtual Private Network；Route mesh
Subtype length value is marked, is used to configure route target parameter to identify different VFR；Priority type length value is used
Return connection priority parameter to indicate that the provider edge router is being returned in connection as specified transponder more in configuration more
Priority.
It particularly, further include the subtype of 5 standards in the bgp attribute subtype length value, wherein 5 marks
Quasi- subtype is respectively as follows: BGP VPNID, normal routing area point, standard importing route target, standard export route targets and CE-
ID/VE-ID。
Particularly, it routes differentiation parameter and route target parameter is based on 5 standard subtype configuration and generates.
Particularly, the method for the routing differentiation parameter is configured the following steps are included: I. confirms the BGP VPNID and institute
The configuration status of CE-ID/VE-ID is stated, if i. is configured or is not configured, is reported an error；Ii. if the only BGP
VPNID or the CE-ID/VE-ID are configured, then set the value of the routing differentiation parameter are as follows: RD type coding, Route Distinguisher
With the cascade of arbitrary number.
Particularly, the Route Distinguisher is 48 addresses system IPv4 of CMTS or DPoE system.
Particularly, the arbitrary number is the monotonic increase integer greater than 1 less than 65535.
Particularly, the method for the route target parameter is configured the following steps are included: I. confirms the BGP VPNID and institute
The configuration status of CE-ID/VE-ID is stated, if i. is configured or is not configured, is reported an error；Ii. if the only BGP
VPNID is configured, then set the value of the route target parameter are as follows: the value of RT type coding, ASN and the BGP VPNID
Cascade；Iii. if only the CE-ID/VE-ID is configured, judge that the standard imports route target and standard export
Whether route target is configured and identical: if be configured and identical, the value of the route target parameter is the standard
Import the value of route target or the standard export route targets；Otherwise, then it reports an error.
Particularly, the ASN is the 28 autonomous systems number of CMTS or DPoE system.
Particularly, the configuration methods for returning connection priority parameter the following steps are included: route the Provider Edge more
The system address of device is converted to numerical value；Return the value of connection priority parameter to be configured to the numerical value after the conversion described more.
The present invention proposes that define the new BGP for meeting DOCSIS returns connection configuration item to configure " draft-IETF- more
The VPLS for CMTS or DPoE system of defined returns connection scheme more in L2VPN-VPLS-multihoming ".In addition, this
Invention also proposed the routing differentiation parameter for automatically configuring the BGP signaling for more returning connection for VPLS and the side of route target parameter
Method.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, of the invention other
Feature, objects and advantages will become more apparent:
Fig. 1 is shown disclosed according to the present invention a kind of to be supported to return the DOCSIS/DPoE network of the VPLS of connection to show more
It is intended to；
Fig. 2 shows the virtual special local area network industry for returning connection based on BGP are realized in provider edge router more
The method flow diagram of business；
Fig. 3 shows the method flow diagram that (RD) parameter is distinguished in configuration routing disclosed according to the present invention；And
Fig. 4 shows the method flow diagram of configuration route target (RT) parameter disclosed according to the present invention.
Specific embodiment
In the following detailed description of the preferred embodiment, reference is constituted to the appended attached drawing of present invention a part.Institute
Attached attached drawing, which has been illustrated by way of example, can be realized specific embodiment.Exemplary embodiment is not intended to
Exhaustive all embodiments according to the present invention.It is appreciated that without departing from the scope of the present invention, can use other
Embodiment can also carry out the modification of structure or logic.Therefore, it is below specific descriptions and it is unrestricted, and this
The range of invention is defined by the claims appended hereto.In addition, although the step of method is described in specification in a particular order
Suddenly, but this does not require that or implies must execute these operations in this particular order, or have to carry out whole institutes
The operation shown just is able to achieve desired as a result, on the contrary, the step of describing can change and execute sequence.Additionally or alternatively, may be used
To omit certain steps, multiple steps are merged into a step and are executed, and/or a step is decomposed into multiple steps and is held
Row.
Currently, it is the bgp protocol based on expansion that optimal VPLS returns connection scheme more, such as is defined within " IETF's
The Virtual Private LAN Service of two-layer virtual private network return connection draft (draft-IETF-L2VPN-VPLS- more
Multihoming the scheme in) ".In DOCSIS/DPoE specification, it can be used to match there are no the type lengths values of standard
CMTS or DPoE system is set to provide support VPLS more and return connection scheme.Therefore, configuration method proposed by the invention
It is the first.
The DOCSIS/DPoE network of disclosed a kind of VPLS for supporting more to return connection according to the present invention as shown in figure 1
The schematic diagram of deployment.Wherein, BGP-MH indicates that BGP returns connection more, and BGP RR is bgp router reflector, MEF UNI be metropolitan area with
Too forum User Network Interface, VPLS PE are the provider edges of Virtual Private LAN Service, and VSI is virtual switch
Example, D-ONU are the optical network units of DPoE, and CE is the customer edge for more returning connection.
In the network deployment of existing single connection, customer edge CE can only be connected to VPLS by a communication path
In srvice instance (Service Instance).For example, CE is connected to by the path of 1 side of D-OUN1, CMTS/DPoE system
The route or CE of VPLS srvice instance are connected to VPLS business reality by the path of 2 side of D-OUN2, CMTS/DPoE system
The route of example.In order to realize the reliability of communication, VPLS returns connection to be applied in DOCSIS/DPoE network more, i.e. CE can be with
It is connected in VPLS srvice instance by 2 even more communication paths.
However in current DOCSIS/DPoE specification, the definition of the sub- TLV of bgp attribute (43.5.21) can not also be supported to match
Set as in " draft-IETF-L2VPN-VPLS-multihoming " defined for VPLS more return the bgp protocol of connection
Signaling information.
Currently, laboratory is according to RFC6074 and RFC4761, for the LDP-VPLS and BGP-VPLS for supporting BGP-AD
Define the sub- TLV of bgp attribute (43.5.21).At the sub- TLV of bgp attribute (43.5.21), there are 5 standard being defined
Type is respectively: BGP VPNID (43.5.21.1), and (43.5.21.2) is distinguished in routing, imports route target
(43.5.21.3), export route targets (43.5.21.4) and CE-ID/VE-ID (43.5.21.5).Wherein, routing is distinguished
(43.5.21.2), route target (importing) (43.5.21.3), route target (export) (43.5.21.4) be used to support
The LDP-VPLS and BGP-VPLS of BGP-AD configures BGP parameter；BGP VPNID (43.5.21.1) is specifically designed to support
The LDP-VPLS configuration parameter of BGP-AD；CE-ID/VE-ID (43.5.21.5) is specifically designed to as BGP-VPLS configuration parameter.
Wherein, it is distinguished to distinguish (43.5.21.6.1) with routing hereinafter, herein, routing is distinguished
(43.5.21.2) is referred to as normal routing area point.Equally, herein, import route target (43.5.21.3) and lead path by
Target (43.5.21.4) is referred to as standard and imports route target (43.5.21.3) and standard export route targets
(43.5.21.4)。
It is noted that CE-ID/VE-ID (43.5.21.5) may be utilized for for the BGP- based on RFC6624
VPWS (the virtual personal cable service of Border Gateway Protocol -) configuration parameter.However, since VPWS service has exceeded model of the invention
It encloses, therefore will not be mentioned herein.
Return connection to provide based on bgp protocol to VPLS, the present invention proposes one new subtype of definition: BGP more
Return connection to configure, so that it can configure VPLS returns necessary BGP signaling parameter required by connection scheme more more.
The BGP returns connection configuration subtype that can be placed on any position under the sub- TLV of bgp attribute (43.5.21) more
On.In order to simplify explanation in the present specification, the BGP newly set returns connection configuration subtype to be numbered as 43.5.21.6 more, comes
In the sub- TLV of bgp attribute (43.5.21) after other defined subtype length values (TLV).It is noted that of the invention
Used in BGP more return connection configuration object subtype number be only for illustration purpose, using other number will not shadow
Ring its function.Only after the formal agreement through cable laboratory, the final number of the subtype can just be determined and openly make
With.Below we be discussed in detail the BGP more return connection configuration subtype (43.5.21.6):
BGP returns connection configuration (BGP Multi-homing Configuration) more
Subtype: 43.5.21.6
Length: n (natural number)
Value: the value that BGP returns connection to configure more is the composite value of its lower subtype/length/value tuple.
It is multi-section Coded (multi-part encoding) that BGP returns connection configuration subtype more, is used to configure BGP
Return the required parameter of connection scheme more.It includes following multiple subtype length value (sub that the BGP returns connection configuration subtype more
TLV):
1. (Route Distinguisher) is distinguished in routing
Subtype: 43.5.21.6.1
Length: 8
Value: integer
Route Area molecule type length value (RD sub TLV) is used to configure returns in the bgp update information of connection signaling more
(RD) parameter is distinguished in routing in NLRI (Network layer reachability information) field.The routing differentiation parameter is mainly used for distinguishing not
Same Virtual Private Network, specific purposes and format are defined in RFC4364, are not repeated herein.Route Area molecule
Type lengths values are the optional subtype length values that BGP returns in connection configuration subtype more.If operator is not returned the BGP more
The subtype length value is configured in connection configuration subtype, CMTS or DPoE system will be that ginseng is distinguished in routing by automatic mode
One value of number configuration.
2. route target (Route Target)
Subtype: 43.5.21.6.2
Value: integer
Route target subtype length value (RT sub TLV) is used to configure opening up for the bgp update information for more returning connection signaling
Open up route target (RT) parameter of shared attribute.The route target parameter is mainly used for identifying different virtual routing forwardings
(VFR).The purposes and format of specific route target parameter are defined in RFC4364, are not repeated herein.It is more for BGP
Return connection signaling, export route targets and importing route target must be consistent, therefore only with a route target subtype
Length value is sufficient.Route target subtype length value is the optional subtype length that BGP returns in connection configuration subtype more
Value.If operator does not configure the subtype length value in returning connection configuration subtype BGP more, CMTS or DPoE system is wanted
It is route target parameter configuration one value by automatic mode.
It is noted that BGP-AD, BGP-VPLS and BGP return connection scheme to believe using different types of bgp update more
The value of breath, routing differentiation parameter and routing differentiation parameter between them can be different.Therefore, BGP returns connection configuration more
Type must have the configuration for routing differentiation and route target of their own, the configuration and existing normal routing area point
(43.5.21.2), standard import route target (43.5.21.3), and standard export route targets (43.5.21.4) are different.It is elected
When taking routing to distinguish and route the mode of the value of differentiation parameter by suitably regulation, it is not configured manually even if them
It can be automatically configured.The routing differentiation of inappropriate manual configuration and route target parameter value are possible to will cause BGP and return more
The failure of connection scheme.Therefore, in most cases, it is proposed that operator does not set routing and distinguishes and route target subtype length
Value is routing differentiation and/or one value of route target parameter configuration by CMTS or DPoE system automatically.
Returning connection site identity (Multi-homed Site ID) 3. more
Subtype: 43.5.21.6.3
Length: 2
Value: the natural number in signless 1 to 65535
Return connection site identity subtype length value (Multi-homed site ID sub TLV) for encoding return more more
Connect Site ID the ID of CE (example as shown in figure 1) parameter of website.Return the purposes of connection site identity to be defined within " draft- more
In IETF-L2VPN-VPLS-multihoming ".Return connection site identity subtype length value is that BGP returns connection to configure more more
The pressure subtype length value of subtype, that is to say, that each BGP returns in connection configuration subtype to have more returns company more one
It goes to the station to meet somebody point identification subtype length value.
4. priority (Preference)
Subtype: 43.5.21.6.4
Length: 2
Value: the natural number in signless 1 to 65535
Priority type length value (Preference sub TLV) is used to configure and returns the priority of connection to join more
Number, to indicate provider edge router in more returning connection as the priority of specified transponder.With higher priority
VPLS edge device will have more chances to be chosen to be specified forwarding router.Priority type length value is that BGP returns more
An optional subtype length value in connection configuration subtype.
We will illustrate how to configure using the bgp attribute subtype length value after above-mentioned expansion below returns connection more
The BGP signaling parameter of VPLS, to realize the Virtual Private LAN Service for returning connection based on BGP more.
Fig. 2 shows the virtual special local area network industry for returning connection based on BGP are realized in provider edge router more
The method of business.
In step 202, provider edge router obtains cable modem from backstage configuration server (TFTP)
Device (CM) configuration file, wherein the configuration file includes bgp attribute subtype length value.
In step 204, provider edge router (PE) is according to the bgp attribute subtype length value (BGP
Attribute Sub TLV) the configuration BGP signaling parameters for returning connection more.Wherein, it is wrapped in the bgp attribute subtype length value
Include: BGP returns connection configuration subtype more, is used to configure and realizes the Virtual Private LAN Service for returning connection based on BGP more
(VPLS) the special parameter item in BGP signaling parameter needed for.The special parameter item includes: routing differentiation parameter, routing mesh
Mark parameter returns connection priority parameter more, returns connection site identity parameter more.
It includes returning connection site identity subtype length value that BGP returns in connection configuration subtype more more, is used to configure more
Return connection site identity parameter to indicate the mark for the customer edge (CE) for more returning connection.In addition, BGP returns connection to configure more
Subtype can also include following optional subtype length value:
Route Area molecule type length value, is used to configure routing differentiation parameter, to distinguish different Virtual Private Network.
Route target subtype length value, is used to configure route target parameter, to identify different VFR.
Priority type length value is used to configure and returns connection priority parameter more, to indicate that Provider Edge routes
Priority of the device in more returning connection as specified transponder.
When BGP returns more lacks these optional subtype length values in connection configuration subtype, the present invention passes through
Following steps to routing differentiation parameter, route target parameter and more return connection priority parameter implement configuration:
1. the method for configuration routing differentiation parameter:
For returning in the bgp update message of connection signaling, the value itself that (RD) parameter is distinguished in routing is nonsensical, very more
Just it is important that the value of routing differentiation parameter must that return the website of connection be unique be more for each.Its purpose is to guarantee
Return the bgp update information of connection website will not be incorrect by intermediate BGP node (such as bgp router reflector) from difference more
Ground is considered as the identical routing of multiple redundancies.CMTS or DPoE system may use any method to generate unique routing and distinguish ginseng
Several parameter values.For example, the value of routing differentiation parameter can be made of 3 fields, the first field is 28 numbers, can
To be arranged to 0x0001 (type that routing is distinguished)；Second field is 48 numbers, can be set to CMTS
Or the Route Distinguisher (system address) of DPoE system；Third field is the Any Digit in 28 1-65535.
In a specific embodiment, BGP VPNID, standard can be based on by routing differentiation parameter and route target parameter
Routing is distinguished, standard imports route target, standard export route targets and the sub- type configuration of CE-ID/VE-ID this 5 generate.Figure
3 show the method flow diagram that (RD) parameter is distinguished in configuration routing disclosed according to the present invention.
BGP VPNID and CE-ID/ in provider edge router confirmation bgp attribute subtype length value in step 302
The configuration status of VE-ID, to be confirmed whether that only BGP VPNID or CE-ID/VE-ID are configured.If BGP VPNID or CE-
ID/VE-ID is configured or is not configured, then implementation steps 304 report an error to indicate to automatically configure failure；If only described
BGP VPNID or the CE-ID/VE-ID are configured, then implementation steps 306 set the value of the routing differentiation parameter are as follows: routing
The cascade of Distinguish coding (Type_Code_RD), Route Distinguisher (Route_ID) and arbitrary number.Wherein, the Route Distinguisher
It (Route_ID) is 48 addresses system IPv4 of CMTS or DPoE system；The arbitrary number is greater than 1 less than 65535
Monotonic increase integer (that is, the number being each selected has to be larger than the number being selected).
2. the method for configuring route target parameter:
For returning in the bgp update message of connection signaling, the value for importing route target and export route targets is necessary more
It is identical, so we can be used 1 parameter route target to implement to encode to the two.Route target can be VPLS ID's
Coding.For supporting the LDP-VPLS of BGP-AD, VPLS ID is by the direct BGP standardized with existing each DOCSIS/DPoE
VPNID (43.5.21.1) implements coding.For BGP-VPLS, VPLS ID impliedly imports road with the standard of each RFC4761
Mutually encode with standard export route targets (43.5.21.4) that (two values must in each RFC4761 by target (43.5.21.3)
It must be identical).Therefore any situation in the LDP-VPLS or BGP-VPLS for supporting BGP-AD, BGP return connection more
Route target (43.5.21.6.2) value of signaling can be automatically configured generation.
In a specific embodiment, BGP VPNID, standard can be based on by routing differentiation parameter and route target parameter
Routing is distinguished, standard imports route target, standard export route targets and the sub- type configuration of CE-ID/VE-ID this 5 generate.
Fig. 4 shows the method flow diagram of configuration route target (RT) parameter disclosed according to the present invention.In step 402
The configuration status of BGP VPNID and CE-ID/VE-ID in middle provider edge router confirmation bgp attribute subtype length value,
To be confirmed whether that BGP VPNID and CE-ID/VE-ID are configured or are not configured, if being all configured or all not matched
It sets, then implementation steps 404 report an error to indicate to automatically configure failure.Otherwise, it is confirmed whether that only BGP VPNID is configured in 406.
If only BGP VPNID is configured, the value of the route target parameter is set in a step 408 are as follows: RT type coding
(Type_Code_RT), the cascade of the value of ASN and BGP VPNID.If only CE-ID/VE-ID is configured, in step 410
Judgment criteria imports route target (43.5.21.3) and whether standard export route targets (43.5.21.4) are configured and the two
The value configured is identical, if standard imports route target (43.5.21.3) and standard export route targets (43.5.21.4) quilt
It configures and is worth identical, then in step 412, the value of route target parameter is that the standard imports route target or the standard
The value of export route targets.Otherwise, then implementation steps 414 report an error to indicate to automatically configure failure.
3. the method for configuration preference level parameter:
The priority that VPLS provider edge router (PE) is chosen as specified forwarding router will be by the PE
The numerical value of address of uniting determines.Priority with the VPLS provider edge router compared with mini system address value will be above having
There is the priority of the VPLS provider edge router of larger system address numerical value.
Specifically, numerical value first can be converted to the system address of the provider edge router；Then described more
The value of connection priority parameter is returned to be set as the numerical value after the system address conversion of the provider edge router.
After to the above-mentioned BGP signaling parameter configurations for returning connection more, implementation steps 206: provider edge router
According to the creations of BGP signaling parameter and maintenance pseudo-wire for returning connection VPLS configured, thus with other in network more
The Virtual Private LAN Service for returning connection based on BGP are established and safeguarded between provider edge router (PE) more.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
How from the point of view of, the present embodiments are to be considered as illustrative and not restrictive.In addition, it will be evident that one word of " comprising " not
Exclude other elements and steps, and wording "one" be not excluded for plural number.The multiple element stated in device claim can also
To be implemented by one element.The first, the second equal words are used to indicate names, and are not indicated any particular order.
Claims (11)
1. realizing the virtual privates for returning connection based on BGP in a kind of provider edge router of DOCSIS/DPoE network more
The method of LAN service, including step:
Cable modem configuration files are obtained from the configuration server of backstage, wherein the configuration file includes bgp attribute
Subtype length value, and include: that BGP returns connection configuration subtype more in the bgp attribute subtype length value, it is used to match
Set the special parameter item in BGP signaling parameter needed for realizing the Virtual Private LAN Service for returning connection based on BGP more；
According to the bgp attribute subtype length value configuration BGP signaling parameters for returning connection more；
It is created according to the BGP signaling parameters for returning connection morely and safeguards pseudo-wire, thus with other Provider Edge roads in network
By the Virtual Private LAN Service for returning connection based on BGP are established and safeguarded between device more.
2. according to the method described in claim 1, wherein, it includes that following subtype is long that the BGP returns connection configuration subtype more
Angle value:
Return connection site identity subtype length value more, be used to configure return more and connect site identity parameter, returns company so that instruction more
The mark of the customer edge connect.
3. according to the method described in claim 2, wherein, it further includes following multiple sons that the BGP returns connection configuration subtype more
At least one of in type lengths values:
Route Area molecule type length value is used to configure routing differentiation parameter to distinguish different Virtual Private Network；
Route target subtype length value is used to configure route target parameter to identify different VFR；
Priority type length value is used to configure and returns connection priority parameter to indicate the provider edge router more
Priority in more returning connection as specified transponder.
4. according to the method described in claim 2, wherein, in the bgp attribute subtype length value further including the son of 5 standards
Type, wherein the 5 standard subtype is respectively as follows: BGP VPNID, normal routing area point, standard importing route target, mark
Quasi- export route targets and CE-ID/VE-ID.
5. according to the method described in claim 4, wherein, routing differentiation parameter and route target parameter being based on 5 standards
Subtype configuration generates.
6. according to the method described in claim 5, wherein, configure the method for the routing differentiation parameter the following steps are included:
I. confirm the configuration status of the BGP VPNID and the CE-ID/VE-ID,
I. it if being all configured or not all being configured, reports an error；
Ii. if only the BGP VPNID or the CE-ID/VE-ID are configured, the value of the routing differentiation parameter is set
Are as follows: the cascade of RD type coding, Route Distinguisher and arbitrary number.
7. according to the method described in claim 6, wherein, the Route Distinguisher is 48 systems of CMTS or DPoE system
The address IPv4.
8. according to the method described in claim 6, wherein, the arbitrary number is the monotonic increase integer greater than 1 less than 65535.
9. according to the method described in claim 5, wherein, configure the method for the route target parameter the following steps are included:
I. confirm the configuration status of the BGP VPNID and the CE-ID/VE-ID,
I. it if being all configured or not all being configured, reports an error；
Ii. if only the BGP VPNID is configured, the value of the route target parameter is set are as follows: RT type coding, ASN
With the cascade of the value of the BGP VPNID；
Iii. if only the CE-ID/VE-ID is configured, judge that the standard imports route target and standard export
Whether route target is configured and identical: if be configured and identical, the value of the route target parameter is the standard
Import the value of route target or the standard export route targets；Otherwise, then it reports an error.
10. according to the method described in claim 9, wherein, the ASN is 28 autonomous systems of CMTS or DPoE system
Number.
11. according to the method described in claim 5, wherein, the configuration methods for returning connection priority parameter more the following steps are included:
The system address of the provider edge router is converted to numerical value；
Return the value of connection priority parameter to be configured to the numerical value after the conversion described more.
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| CN103248548A (en) * | 2012-02-08 | 2013-08-14 | 中兴通讯股份有限公司 | Method for achieving E-tree service based on VPLS and node |
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