CN106572012A - VPN FRR implementation method and PE equipment - Google Patents
VPN FRR implementation method and PE equipment Download PDFInfo
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- CN106572012A CN106572012A CN201610963225.6A CN201610963225A CN106572012A CN 106572012 A CN106572012 A CN 106572012A CN 201610963225 A CN201610963225 A CN 201610963225A CN 106572012 A CN106572012 A CN 106572012A
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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
- H04L45/28—Routing or path finding of packets in data switching networks using route fault recovery
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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
- H04L45/02—Topology update or discovery
-
- 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
- H04L45/22—Alternate routing
-
- 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
- H04L45/50—Routing or path finding of packets in data switching networks using label swapping, e.g. multi-protocol label switch [MPLS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/70—Admission control; Resource allocation
- H04L47/82—Miscellaneous aspects
- H04L47/825—Involving tunnels, e.g. MPLS
Abstract
The embodiment of the invention discloses a VPN FRR implementation method and PE equipment, relates to the technical field of communication, and is used for implementing VPN FRR protection when a user side link fails to work so as to prevent loss of traffic. The method comprises the steps that source PE equipment receives routing information which is published by main target PE equipment and includes first user side link information and routing information which is published by standby target PE equipment and includes second user side link information; the source PE equipment generates corresponding forwarding items according to the routing information to be issued to a forwarding engine, wherein the forwarding items include main and standby forwarding information; and when the source PE equipment acquires that the first user side link is unavailable, the source PE equipment sets the state flag corresponding to the forwarding items in the forwarding engine as an unavailability flag so that the forwarding engine is enabled to perform traffic forwarding according to the standby forwarding information in the forwarding items if the state flag corresponding to the forwarding items is detected to be the unavailability flag when the forwarding engine hits the forwarding items.
Description
Technical field
The present invention relates to communication technical field, more particularly to a kind of reality of the quick heavy-route VPN FRR of VPN
Existing method and PE equipment.
Background technology
In today of network high-speed development, operator pays much attention to business convergence speed during network failure, any
During one nodes break down, adjacent node business is switched less than 50ms, and teleservice convergence progressively becomes less than the own Jing of 1s
The threshold level index of bearer network.
The requirement that 1s is less than less than 50ms, teleservice convergence, MPLS TE are switched in order to reach adjacent node business
The quick heavy-route of FRR multi-protocol label switching traffic engineerings, wherein：MPLS is Multi-Protocol Label Switching
English abbreviation, i.e. multiprotocol label switching；TE is the English abbreviation of Traffic Engineering, i.e. traffic engineering；FRR
For the English abbreviation of Fast Re-Route, i.e., quick heavy-route) technology, IGP (Interior Gateway Protocol, it is interior
Portion's gateway protocol) fast route convergence technology (IP FRR) is all arisen at the historic moment, but they all cannot be solved in CE (Customer
Edge, customer network edge) dual homed PE (Provider Edge, service provider network edge) network in, PE device nodes
The problem of end to end service rapid convergence during failure.
VPN (Virtual Private Network, the VPN) FRR of prior art is then to solve CE dual homeds
A kind of means of the teleservice convergence problem of this universal network model, by the way that backup path information is issued in advance,
Backup path is switched to during failure, so as to by the convergence time of the teleservice in the case of PE node failures control 1s with
It is interior.
Specifically, in VPN FRR technologies, as shown in figure 1, accessing the main path of CE2 as CE1-PE1-PE2- with CE1
CE2, backup path is as a example by CE1-PE1-PE3-CE2；When PE2 does not break down, it is main road that CE1 accesses the path of CE2
Footpath, and when PE2 breaks down, CE1 accesses the path of CE2 and is quickly switched into backup path.
But, when using VPN FRR technologies, VPN traffic can only be carried out to node failure (PE equipment faults) and quickly be cut
Change, and VPN traffic cannot be carried out to user side link failure (link failure between PE equipment and CE equipment) and be switched fast.When with
During the sidelinks failure of family, access path still still can be along the road of CE1-PE1-PE2 for main path CE1-PE1-PE2-CE2, i.e. flow
Footpath is forwarded to PE2, and will cause packet loss due to can not find outgoing interface on PE2.Want to recover the business between ce1 and ce2
Transmission, need to carry out routing convergence, and convergence time is limited to the quantity of VPN routes, long will also result in of convergence time is lost
Bag.
The content of the invention
Embodiments of the invention provide a kind of implementation method and PE of the quick heavy-route VPN FRR of VPN and set
It is standby, when user's sidelinks break down, to realize that VPN FRR are protected, so as to prevent the loss of flow.
To reach above-mentioned purpose, embodiments of the invention are adopted the following technical scheme that：
In a first aspect, the present invention provides a kind of realization side of the quick heavy-route VPN FRR of VPN in implementing
Method, is applied to the network of customer network edge CE dual homed service provider network edge PE, including source CE equipment, source PE equipment,
Target CE equipment, primary target PE equipment and alternate target PE equipment；The method includes：
The source PE equipment is received described in the sensing that the primary target PE equipment and the alternate target PE equipment are issued
The routing iinformation of target CE equipment, the routing iinformation that the primary target PE equipment is issued includes：First user sidelinks information,
For indicating link between the primary target PE equipment and the target CE equipment, the road that the alternate target PE equipment is issued
Included by information：Second user sidelinks information, for indicating between the alternate target PE equipment and the target CE equipment
Link；
The source PE equipment generates corresponding forwarding item according to the routing iinformation, in being issued to forwarding engine, described turn
Sending out item includes the primary forwarding information of the routing iinformation generation issued according to the primary target PE equipment and according to described standby
The standby forwarding information that the routing iinformation that target PE equipment is issued is generated；
When the source PE equipment is known the first user sidelinks are unavailable when, the source PE equipment will forward engine in
It is described to forward the corresponding Status Flag of item to be set to unavailable mark, so that forwarding engine is when the forwarding item is hit, if
It is unavailable mark to detect the corresponding Status Flag of the forwarding item, then the described standby forwarding letter in the forwarding item
Breath carries out flow forwarding.
Second aspect, the present invention provides a kind of PE equipment in implementing, and is applied to customer network edge CE dual homed services and carries
For the network of business network edge PE, the network includes source PE equipment, target CE equipment, primary target PE equipment and alternate target
PE equipment；The PE equipment includes as source PE equipment, the equipment：
Receiving unit, for receiving described in the sensing that the primary target PE equipment and the alternate target PE equipment are issued
The routing iinformation of target CE equipment, the routing iinformation that the primary target PE equipment is issued includes：First user sidelinks information,
For indicating link between the primary target PE equipment and the target CE equipment, the road that the alternate target PE equipment is issued
Included by information：Second user sidelinks information, for indicating between the alternate target PE equipment and the target CE equipment
Link；
Signal generating unit, for generating corresponding forwarding item according to the routing iinformation, in being issued to forwarding engine, described turn
Sending out item includes the primary forwarding information of the routing iinformation generation issued according to the primary target PE equipment and according to described standby
The standby forwarding information that the routing iinformation that target PE equipment is issued is generated；
Setting unit, for when knowing that the first user sidelinks are unavailable, item will to be forwarded described in forwarding engine
Corresponding Status Flag is set to unavailable mark, so that forwarding engine is when the forwarding item is hit, if detecting described
The corresponding Status Flag of forwarding item is unavailable mark, then the described standby forwarding information in the forwarding item carries out flow
Forwarding.
The implementation method and PE for embodiments providing a kind of quick heavy-route VPN FRR of VPN sets
It is standby, by increasing the use for indicating link between target PE equipment and target CE equipment in the routing iinformation that target PE equipment is issued
Family sidelinks information, so as to source PE equipment generates corresponding forwarding item according to the routing iinformation, in being issued to forwarding engine.Wherein
Forwarding item includes the primary forwarding information of the routing iinformation generation issued according to primary target PE equipment and according to alternate target PE
The standby forwarding information that the routing iinformation that equipment is issued is generated.So forward in the primary forwarding information in item and contain the first use
Family sidelinks information, contains second user sidelinks information in standby forwarding information.When source, PE equipment knows first user side
When link is unavailable, source PE equipment will be forwarded in engine and forward the corresponding Status Flag of item to be set to unavailable mark, so that
Forwarding engine is when the forwarding item is hit, if it is unavailable mark to detect the corresponding Status Flag of forwarding item, according to forwarding
Standby forwarding information in carries out flow forwarding.So as to be directed to the problem of user side link failure, VPN FRR guarantors are realized
Shield, it is therefore prevented that the loss of flow.
Description of the drawings
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below will be in embodiment or description of the prior art
The required accompanying drawing for using is briefly described, it should be apparent that, drawings in the following description are only some realities of the present invention
Example is applied, for those of ordinary skill in the art, on the premise of not paying creative work, can be with according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is in prior art in CE dual homed PE networks, for the VPN FRR of node failure schematic diagram to be switched；
Fig. 2 is in a kind of CE dual homeds PE networks provided in an embodiment of the present invention, for the VPN FRR of user side link failure
Switching schematic diagram；
Fig. 3 is a kind of flow chart of the implementation method of VPN FRR provided in an embodiment of the present invention；
Fig. 4 is a kind of block diagram of PE equipment provided in an embodiment of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Term "and/or" in the embodiment of the present invention, a kind of only incidence relation of description affiliated partner, expression can deposit
In three kinds of relations, for example, A and/or B can be represented：Individualism A, while there is A and B, individualism B these three situations.
In addition, character "/" in the embodiment of the present invention, typicallys represent forward-backward correlation pair as if a kind of relation of "or".
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include one or more this feature.In describing the invention, unless otherwise stated, " multiple " are meant that two
Individual or two or more.
Embodiment one
Embodiments provide a kind of implementation method of the quick heavy-route VPN FRR of VPN, by
Add user side link information in forwarding item, when first user sidelinks are unavailable, source PE equipment will be forwarded in engine and forwarded
The corresponding Status Flag of item is set to unavailable mark, so that forwarding engine is in hit forwarding item, if detecting forwarding item
Corresponding Status Flag is unavailable mark, then the standby forwarding information in forwarding item carries out flow forwarding.So as to realize
VPN FRR, solve the problems, such as packet loss during user side link failure.
Below by taking the network of the customer network edge CE dual homed service provider network edge PE shown in Fig. 2 as an example, to this
Inventive embodiments are described in detail.In the network architecture, user CE directly sets up ebgp neighbor with PE equipment.Source CE equipment is
CE1, source PE equipment is PE1, and primary target PE equipment is PE1, and alternate target PE equipment is PE2, target CE equipment be CE2 and
CE3.Understand to be set up between primary target PE equipment and multiple target CE equipment in the framework and have link, such as PE1 is while and CE2
Setting up and CE3 between has link.Wherein, PE1 and PE2 are mutually arranged as opposite end PE equipment, and PE1 and PE3 is mutually arranged as opposite end
PE equipment.
It should be noted that in embodiments of the present invention, illustrate by taking an alternate target PE equipment as an example, but do not limit
In one, there can be multiple alternate target PE equipment；There can also be one or more P between the PE device target PE equipment of source simultaneously
Equipment, will not be described here.As shown in figure 3, the method is specifically included：
S101, source PE equipment receive the sensing target CE equipment that primary target PE equipment and alternate target PE equipment are issued
Routing iinformation.
In existing VPN FRR technologies, sensing target CE that primary target PE equipment and alternate target PE equipment are issued sets
Standby routing iinformation includes the address information of routing device, the such as address information of primary target PE equipment.
Example, with reference to shown in Fig. 2, PE2/PE3 by the routing iinformation of this equipment (address information including PE2/PE3,
Address information of PE2/PE3 next-hops etc.) it is distributed to PE1.
Example, PE2 and PE3 can be issued to PE1 and be pointed to the routing iinformation of CE2, and distribute private network tags.PE1 according to
The routing iinformation of the sensing CE2 that PE2 and PE3 is issued, generates VPN FRR route table items.
Then in existing VPN FRR technologies, the key content of the VPN FRR route table items that PE1 is generated (is joined as shown in table 1
Number is illustration)：
Table 1
| RoutingTable (routing table):VPN1 | |
| Route table items 1 | |
| Destination (destination address):10.3.1.0/24 | |
| Protocol (agreement):IBGP | ProcessID (process ID):0 |
| Preference (parameter):255 | Cost (expense):0 |
| NextHop (next-hop):2.2.2.2 | Neighbour (neighbours):2.2.2.2 |
| Label (label):15361 | |
| BkNextHop (standby next-hop):3.3.3.3 | BkLabel (spare labels):15362 |
| Route table items 2 | |
| Destination (destination address):11.3.1.0/24 | |
| Protocol (agreement):IBGP | ProcessID (process ID):0 |
| Preference (parameter):255 | Cost (expense):0 |
| NextHop (next-hop):2.2.2.2 | Neighbour (neighbours):2.2.2.2 |
| Label (label):15371 | |
| BkNextHop (standby next-hop):3.3.3.3 | BkLabel (spare labels):15372 |
In VPN FRR technologies provided in an embodiment of the present invention, the routing iinformation that primary target PE equipment is issued also includes：
First user sidelinks information, for indicating link between primary target PE equipment and target CE equipment, alternate target PE equipment
The routing iinformation of issue includes：Second user sidelinks information, for indicating between alternate target PE equipment and target CE equipment
Link.
Example, with reference to shown in Fig. 2, so that CE1 accesses CE2 as an example, the routing iinformation that PE2 is issued includes：First user side
Link information, can be represented with PE_Nexthop, and for indicating link between PE2 and CE2, link can be used between PE2 and CE2
Link A are represented.PE_Nexthop can be that CE2 enters to connect on the outgoing interface address of PE2 on Link A, or Link A
Port address.In embodiments of the present invention the PE_Nexthop of Link A is 4.4.4.4.The routing iinformation that PE3 is issued includes：Second
User side link information, it is also possible to which BkPE_Nexthop is represented, for indicating link between PE3 and CE2, chain between PE3 and CE2
Road can be represented with Link B.BkPE_Nexthop can be on the outgoing interface address of PE3 on Link B, or Link B
The incoming interface address of CE2.In embodiments of the present invention the BkPE_Nexthop of Link B is 5.5.5.5.In the same manner, when CE1 is accessed
During CE3, the routing iinformation that PE2 and PE3 is issued accordingly changes.
Then the key content of the VPN FRR route table items that PE1 is generated is as shown in table 2：
Table 2
S102, source PE equipment generate corresponding forwarding item according to routing iinformation, in being issued to forwarding engine.
Specifically, the routing iinformation, standby that PE equipment in source is issued according to VPN FRR route table items, primary target PE equipment
The routing iinformation of target PE equipment issue and the exit port/ingress port information of each equipment etc. generate corresponding forwarding item.
Forwarding item includes the primary forwarding information of the routing iinformation generation issued according to primary target PE equipment and according to standby
The standby forwarding information that the routing iinformation issued with target PE equipment is generated.
Example, PE1 as shown in Figure 2 is issued according to VPN FRR route table items (NextHop, PE_Nexthop etc.), PE2
Routing iinformation, the information such as outgoing interface and incoming interface of link generates primary forwarding information between PE1 and PE2；PE1 is according to VPN
FRR route table items (BkNextHop, BkPE_Nexthop), PE3 issue routing iinformation, link goes out to connect between PE1 and PE3
The information such as mouth and incoming interface generates standby forwarding information.
It should be noted that：In embodiments of the present invention, user side link information is increased in the forwarding item of generation, such as
PE_Nexthop, BkPE_Nexthop, other information refer to prior art in forwarding item.
S103 (optional), source PE equipment receive the disabled notice of first user sidelinks.
When primary target PE equipment is unavailable to first user sidelinks using two-way converting detection BFD technology for detection.
Source PE equipment receives the disabled notice of first user sidelinks.
It should be noted that：In embodiments of the present invention, primary target PE equipment can also adopt its beyond BFD technologies
His technology, such as technology such as MPLS OAM is detecting whether first user sidelinks can use.
Example, with reference to shown in Fig. 2, in the LinkA link configuration BFD for IP of PE2, detect peer IP address
4.4.4.4 whether can use.Then in the case of Link A link failures, PE2 after BFD technology for detection to link failure, PE2
Confirm that PE_Nexthop=4.4.4.4 is unavailable, so as to notice PE1, it is disabled that PE1 receives PE_Nexthop=4.4.4.4
Notice.
S104, when source PE equipment knows that first user sidelinks are unavailable, source PE equipment will forward engine in forward item
Corresponding Status Flag is set to unavailable mark.
So that forwarding engine is in hit forwarding item, if it is unavailable mark to detect the corresponding Status Flag of forwarding item
Know, then the standby forwarding information in forwarding item carries out flow forwarding.
Example, with reference to shown in Fig. 2, first user sidelinks PE_Nexthop=in PE1 knows primary forwarding information
4.4.4.4 when unavailable, PE1 will forward the corresponding Status Flag of forwarding item in engine to be set to unavailable mark.Work as forwarding
When engine hits the forwarding item, the corresponding Status Flag of forwarding item is detected, if unavailable mark, then according in the forwarding item
Standby forwarding information carry out flow forwarding.
Preferably, state table is provided with source PE equipment, record has Status Flag in state table.
Source PE equipment will forward the corresponding Status Flag of forwarding item in engine to be set to unavailable mark to be included：When source, PE sets
It is standby when knowing that first user sidelinks are unavailable, will be used to indicate first user sidelinks unusable state mark in state table
Unavailable mark is set to, the state table after renewal is issued in forwarding engine.
Example, with reference to shown in Fig. 2, state table is provided with PE1, record has Status Flag in state table.State
Each Status Flag of table record is corresponded with each forwarding item in forward table, and Status Flag indicates the master of its corresponding forwarding item
Whether can use with forwarding information.When PE1 has known first user sidelinks PE_Nexthop=4.4.4.4 between PE2 and CE2
When unavailable, then will be used to indicate first user sidelinks unusable state traffic sign placement in state table for unavailable mark,
State table after renewal is issued in forwarding engine.Preferably, when source PE equipment knows that source PE equipment sets with primary target PE
When label switched path external LSP tunnel between standby is unavailable, will be used to indicate that first user sidelinks can not in state table
Status Flag is set to unavailable mark.
That is, in the network of CE dual homed PE, for the node failure in primary forwarding information and user's sidelinks
Failure, it is possible to use identical Status Flag, it is also possible to which different Status Flags are set.For example, when PE1 passes through BFD, MPLS
The technology perceptions such as OAM are unavailable to the outer layer tunnel between PE1 and PE2, just arrange the respective flag in lsp tunnel state table
For it is unavailable and be issued to forwarding engine in, forwarding engine hit one forwarding item after, check the corresponding LSP tunnels of the forwarding item
Road state, if unavailable, is then forwarded using the standby forwarding information carried in this forwarding item.So, message will
The vpn label of PE3 distribution is labeled with, the outer layer lsp tunnel along between PE1 and PE3 exchanges to PE3, relays to CE2, from
And the business of recovery CE1 to CE2, realize the Fast Convergent of the teleservice in the case of PE2 node failures.Configure on PE2
Whether BFD for IP agreements detection PE_Nexthop can use, in the case of PE_Nexthop is disabled, based on PE_
Trigger VPN FRR in Nexthop addresses, it is also possible to by the respective flag in correspondence lsp tunnel state table be set to it is unavailable and under
In being dealt into forwarding engine, forwarding engine is hit after a forwarding item, checks the corresponding lsp tunnel state of the forwarding item, if
For unavailable, then forwarded using the standby forwarding information carried in this forwarding item, in the case of realizing user side link failure
Teleservice Fast Convergent.
Certainly, user side link failure is worked as, when causing PE_Nexthop unavailable, it is also possible to using different from node failure
New Status Flag come indicate its it is corresponding forwarding item primary forwarding information whether can use.
Example, with reference to shown in Fig. 2, PE2 sets up between CE2 and CE3 simultaneously link, when detecting PE_Nexthop
When=4.4.4.4 is unavailable, the corresponding Status Flag of forwarding item 1 in table 2 is set to into unavailable mark, and forwards item 2 pairs
The Status Flag answered is still available mark.So, when engine hit forwarding item 1 is forwarded, PE1 detects the state of forwarding item 1
Unavailable mark is masked as, then using standby forwarding information BkNextHop=3.3.3.3, BkPE_Nexthop=of forwarding item 1
6.6.6.6 carry out flow forwarding.When engine hit forwarding item 2 is forwarded, it is available that PE1 detects the Status Flag of forwarding item 2
Mark, then still carried out using primary forwarding information NextHop=2.2.2.2, PE_Nexthop=5.5.5.5 of forwarding item 2
Flow is forwarded.
Understand, the implementation method of VPN FRR provided in an embodiment of the present invention, when primary PE equipment simultaneously with multiple targets CE
When foundation has link between equipment, when one or more user sidelinks therein break down, it is only necessary to faulty link reality
VPN FRR protections are applied, other links are unaffected.
Embodiments provide a kind of implementation method of the quick heavy-route VPN FRR of VPN, by
Add user side link information in forwarding item, when first user sidelinks are unavailable, realize VPN FRR protections, solve
Packet loss problem during user side link failure.
Embodiment two
A kind of PE equipment is embodiments provided, customer network edge CE dual homed service provider networks side is applied to
The network of edge PE, the network includes source PE equipment, target CE equipment, primary target PE equipment and alternate target PE equipment；Institute
PE equipment is stated as source PE equipment, the realization of each functional module in the equipment may be referred to above-described embodiment one, and here is no longer
Repeat.The equipment includes with reference to shown in Fig. 4：
Receiving unit 11, for receiving the sensing institute that the primary target PE equipment and the alternate target PE equipment are issued
The routing iinformation of target CE equipment is stated, the routing iinformation that the primary target PE equipment is issued includes：First user sidelinks are believed
Breath, for indicating link between the primary target PE equipment and the target CE equipment, the alternate target PE equipment is issued
Routing iinformation include：Second user sidelinks information, for indicating the alternate target PE equipment with the target CE equipment
Between link；
Signal generating unit 12, the routing iinformation for being received according to the receiving unit 11 generates corresponding forwarding
, in being issued to forwarding engine, the forwarding item includes what the routing iinformation issued according to the primary target PE equipment was generated
The standby forwarding information that primary forwarding information and the routing iinformation issued according to the alternate target PE equipment are generated；
Setting unit 13, for when knowing that the first user sidelinks are unavailable, will generate described in forwarding engine
The corresponding Status Flag of the forwarding item that unit 12 is generated is set to unavailable mark, so that forwarding engine is described in hit
During forwarding item, if it is unavailable mark to detect the corresponding Status Flag of the forwarding item, according to the institute in the forwarding item
Stating standby forwarding information carries out flow forwarding.
Optionally, state table is provided with the source PE equipment, record has Status Flag in the state table；
The setting unit 13, is additionally operable to, when knowing that the first user sidelinks are unavailable, to be used in state table
Indicate that the first user sidelinks unusable state traffic sign placement is unavailable mark；Under the state table after by renewal
In being dealt into the forwarding engine.
Optionally, the setting unit 13, be additionally operable to when know the source PE equipment and the primary target PE equipment it
Between label switched path external LSP tunnel it is unavailable when, will in state table be used for indicate that the first user sidelinks can not
Status Flag is set to unavailable mark.
That is, when external LSP tunnel is unavailable, or first user sidelinks it is unavailable when, in corresponding states table
Same Status Flag, by the Status Flag in state table unavailable mark is set to.Different states can certainly be corresponded to
Mark, when external LSP tunnel is unavailable, by its corresponding Status Flag unavailable mark is set to；When first user side chain
When road is unavailable, its corresponding Status Flag is set to into unavailable mark.
Optionally, setting up between the primary target PE equipment and multiple target CE equipment has link.
Optionally, the receiving unit 11, is additionally operable to when the primary target PE equipment detects BFD skills using two-way converting
Art detect the first user sidelinks it is unavailable when, receive the disabled notice of the first user sidelinks.
It should be noted that the receiving unit 11 in the present embodiment can be the interface electricity for possessing receive capabilities on PE equipment
Road, such as receiver or information receiving interface.Other units can be the processor individually set up, it is also possible to be integrated in PE equipment
Realize in some processor, in addition it is also possible to be stored in the form of program code in the memory of PE equipment, by PE equipment
Some processor call and perform the function of above unit.Processor described here can be that a central authorities are processed
Device (English full name：Central Processing Unit, English abbreviation：CPU), or specific integrated circuit (English is complete
Claim：Application Specific Integrated Circuit, English abbreviation：ASIC), or be arranged to implement
One or more integrated circuits of the embodiment of the present invention.
A kind of PE equipment is embodiments provided, by adding user side link information in forwarding item, when first
When user's sidelinks are unavailable, VPN FRR protections are realized, solve the problems, such as packet loss during user side link failure.
In several embodiments provided herein, it should be understood that disclosed system, apparatus and method can be with
Realize by another way.For example, device embodiment described above is only schematic, for example, the unit
Divide, only a kind of division of logic function can have other dividing mode, such as multiple units or component when actually realizing
Can with reference to or be desirably integrated into another system, or some features can be ignored, or not perform.It is another, it is shown or
The coupling each other for discussing or direct-coupling or communication connection can be the indirect couplings by some interfaces, device or unit
Close or communicate to connect, can be electrical, mechanical or other forms.
The unit as separating component explanation can be or may not be it is physically separate, it is aobvious as unit
The part for showing can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On NE.Some or all of unit therein can according to the actual needs be selected to realize the mesh of this embodiment scheme
's.
In addition, each functional unit in each embodiment of the invention can be integrated in a processing unit, it is also possible to
It is that the independent physics of unit includes, it is also possible to which two or more units are integrated in a unit.Above-mentioned integrated list
Unit both can be realized in the form of hardware, it would however also be possible to employ hardware adds the form of SFU software functional unit to realize.
The above-mentioned integrated unit realized in the form of SFU software functional unit, can be stored in an embodied on computer readable and deposit
In storage media.Above-mentioned SFU software functional unit is stored in a storage medium, including some instructions are used so that a computer
Equipment (can be personal computer, server, or network equipment etc.) performs the portion of each embodiment methods described of the invention
Step by step.And aforesaid storage medium includes：USB flash disk, portable hard drive, read-only storage (Read-Only Memory, abbreviation
ROM), random access memory (Random Access Memory, abbreviation RAM), magnetic disc or CD etc. are various can store
The medium of program code.
Finally it should be noted that：Above example only to illustrate technical scheme, rather than a limitation；Although
The present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used
To modify to the technical scheme described in foregoing embodiments, or equivalent is carried out to which part technical characteristic；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (10)
1. a kind of implementation method of the quick heavy-route VPN FRR of VPN, is applied to customer network edge CE dual homeds clothes
The network of business provider network edge PE, including source CE equipment, source PE equipment, target CE equipment, primary target PE equipment and standby
With target PE equipment；Characterized in that, the method includes：
The source PE equipment receives the sensing target that the primary target PE equipment and the alternate target PE equipment are issued
The routing iinformation of CE equipment, the routing iinformation that the primary target PE equipment is issued includes：First user sidelinks information, is used for
Link between the primary target PE equipment and the target CE equipment is indicated, the route letter that the alternate target PE equipment is issued
Breath includes：Second user sidelinks information, for indicating link between the alternate target PE equipment and the target CE equipment；
The source PE equipment generates corresponding forwarding item according to the routing iinformation, in being issued to forwarding engine, the forwarding item
Including the primary forwarding information generated according to the routing iinformation of the primary target PE equipment issue and according to the alternate target
The standby forwarding information that the routing iinformation that PE equipment is issued is generated；
When the source PE equipment is known the first user sidelinks are unavailable when, the source PE equipment will forward engine described in
The corresponding Status Flag of forwarding item is set to unavailable mark, so that forwarding engine is when the forwarding item is hit, if detection
It is unavailable mark to the corresponding Status Flag of the forwarding item, then the described standby forwarding information in the forwarding item enters
Row flow is forwarded.
2. method according to claim 1, it is characterised in that state table is provided with the source PE equipment, in the shape
Record has Status Flag in state table；
The source PE equipment will forward the corresponding Status Flag of forwarding item described in engine to be set to unavailable mark to be included：
When the source PE equipment is known the first user sidelinks are unavailable when, will in state table be used for indicate it is described first use
Family sidelinks unusable state traffic sign placement is unavailable mark；
The state table after by renewal is issued in the forwarding engine.
3. method according to claim 2, it is characterised in that methods described also includes：
When the source PE equipment is known outside the label switched path LSP between the source PE equipment and the primary target PE equipment
When layer tunnel is unavailable, will be used to indicate the first user sidelinks unusable state traffic sign placement for can not in state table
With mark.
4. method according to claim 1, it is characterised in that the primary target PE equipment sets with multiple targets CE
Setting up between standby has link.
5. method according to claim 1, it is characterised in that methods described also includes：
When the primary target PE equipment detects that BFD technology for detection is unavailable to the first user sidelinks using two-way converting
When；The source PE equipment receives the disabled notice of the first user sidelinks.
6. a kind of PE equipment, is applied to the network of customer network edge CE dual homed service provider network edge PE, the network
Including source PE equipment, target CE equipment, primary target PE equipment and alternate target PE equipment；The PE equipment sets as source PE
It is standby, it is characterised in that the equipment includes：
Receiving unit, for receiving the sensing target that the primary target PE equipment and the alternate target PE equipment are issued
The routing iinformation of CE equipment, the routing iinformation that the primary target PE equipment is issued includes：First user sidelinks information, is used for
Link between the primary target PE equipment and the target CE equipment is indicated, the route letter that the alternate target PE equipment is issued
Breath includes：Second user sidelinks information, for indicating link between the alternate target PE equipment and the target CE equipment；
Signal generating unit, for generating corresponding forwarding item according to the routing iinformation, in being issued to forwarding engine, the forwarding item
Including the primary forwarding information generated according to the routing iinformation of the primary target PE equipment issue and according to the alternate target
The standby forwarding information that the routing iinformation that PE equipment is issued is generated；
Setting unit, for when knowing that the first user sidelinks are unavailable, item correspondence being forwarded described in forwarding engine
Status Flag be set to unavailable mark so that forwarding engine hit it is described forwarding item when, if detecting the forwarding
The corresponding Status Flag of item is unavailable mark, then the described standby forwarding information in the forwarding item carries out flow turn
Send out.
7. equipment according to claim 6, it is characterised in that state table is provided with the source PE equipment, in the shape
Record has Status Flag in state table；
The setting unit, is additionally operable to, when knowing that the first user sidelinks are unavailable, to be used to indicate institute in state table
First user sidelinks unusable state traffic sign placement is stated for unavailable mark；The state table after by renewal is issued to institute
In stating forwarding engine.
8. equipment according to claim 7, it is characterised in that the setting unit, is additionally operable to when knowing that the source PE sets
When standby unavailable with the label switched path external LSP tunnel between the primary target PE equipment, will be used to refer in state table
Show that the first user sidelinks unusable state traffic sign placement is unavailable mark.
9. equipment according to claim 6, it is characterised in that the primary target PE equipment sets with multiple targets CE
Setting up between standby has link.
10. equipment according to claim 6, it is characterised in that the receiving unit, is additionally operable to when primary target PE
Equipment using two-way converting detection BFD technology for detection to the first user sidelinks it is unavailable when, the reception first user
The disabled notice of sidelinks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610963225.6A CN106572012A (en) | 2016-11-04 | 2016-11-04 | VPN FRR implementation method and PE equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610963225.6A CN106572012A (en) | 2016-11-04 | 2016-11-04 | VPN FRR implementation method and PE equipment |
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| Publication Number | Publication Date |
|---|---|
| CN106572012A true CN106572012A (en) | 2017-04-19 |
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ID=58535937
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610963225.6A Pending CN106572012A (en) | 2016-11-04 | 2016-11-04 | VPN FRR implementation method and PE equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106572012A (en) |
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| CN108924046A (en) * | 2018-07-16 | 2018-11-30 | 烽火通信科技股份有限公司 | A kind of guard method and system of gre tunneling bearer service |
| CN111565141A (en) * | 2020-04-13 | 2020-08-21 | 中国联合网络通信集团有限公司 | Data transmission method, first PE and second PE |
| WO2020244304A1 (en) * | 2019-06-03 | 2020-12-10 | 中兴通讯股份有限公司 | Method for sending routing information, method and apparatus for routing selection |
| WO2021203346A1 (en) * | 2020-04-09 | 2021-10-14 | Qualcomm Incorporated | New radio data connectivity from non-standalone network |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108924046A (en) * | 2018-07-16 | 2018-11-30 | 烽火通信科技股份有限公司 | A kind of guard method and system of gre tunneling bearer service |
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