CN103457817B - The guard method of PW+L3VPN a kind of and system - Google Patents
The guard method of PW+L3VPN a kind of and system Download PDFInfo
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Abstract
The invention discloses the guard method of PW+L3VPN a kind of and system, method includes：The active and standby pseudo-wire (PW) of single-emission and double-receiving attribute, active and standby PW terminations to two three-layer network artis are configured on access nodes；Access node sends address resolution protocol (ARP) information and routing iinformation, the ARP information and routing iinformation to two three-layer network artis by active and standby PW and noticed via three-layer network artis in three-layer virtual special network (L3VPN) domain；Each node configures the forwarding state of itself according to ARP information and routing iinformation, and carries out corresponding forwarding respectively to uplink and downlink flow according to forwarding state；In network failure, entered line translation by the forwarding state of the node of fault impact, and carry out corresponding forwarding respectively to uplink and downlink flow according to the forwarding state after conversion.By the present invention, switch speed is fast, is advantageous to be lifted the robustness of network, reduces O＆M complexity；VRRP need not be configured in three-layer network artis, the problem of VRRP is double main will not occur.
Description
Technical field
The present invention relates to the bearing technology field of existing network business, more particularly to a kind of PW+L3VPN guard method and be
System.
Background technology
At present, the based Carrying Scheme of existing network business mainly includes two mainstream schemes, is pseudo-wire (PW, Pseudo respectively
Wire)+three layers (L3) VPN (VPN, Virtual Private Network) based Carrying Scheme and customer edge
(CE, Customer Edge)+L3VPN based Carrying Schemes.So-called existing network business, refer to the business of current network.
Wherein, PW+L3VPN based Carrying Schemes are as shown in figure 1, in the network shown in fig. 1, by A nodes (access node) group
Into access ring be articulated on two B nodes, more than B node, base station controller (BSC, Base Station
Controller these equipment of)/access gateway (aGW) below collectively constitute a core convergence ring.As deployment PW+L3VPN
During based Carrying Scheme, A nodes on access ring are to disposing PW business between B node, more than B node, below BSC/aGW Network Dept.
L3VPN business is affixed one's name to, and this two B nodes are then gateway nodes.Business point three sections of carryings from base station (BTS/eNB) to BSC/aGW,
The A nodes accessed from base station are first paragraphs to B node, pass through PW service bearers；It is second segment from B node to CE, passes through L3VPN
Service bearer；It is the 3rd section from CE to BSC/aGW, generally use IP carryings.
In specific implementation process, PW+L3VPN based Carrying Schemes use a series of redundancy protecting mechanism：A nodes are established respectively
Simultaneously enter the L3VPN of convergence core layer to the redundancy PW of two B nodes, B node termination PW；Two B nodes are respectively as three layers
Gateway, there is provided double gateways of business are protected.
At present, PW+L3VPN based Carrying Schemes generally have two kinds of gateway protection mechanisms：
Mechanism one is, by the linkage of A nodes and B node, do not start Virtual Router Redundancy Protocol (VRRP,
Virtual Router Redundancy Protocol) scene under, realize that the quick of L3VPN active/standby gateways is switched；
Mechanism two is, by the VRRP between B node, to realize that the quick of L3VPN active/standby gateways is switched.
Wherein, the detailed process of mechanism one is as shown in Figure 2：
A nodes configuration preference level identifies master-slave redundancy PW, and redundancy PW terminates in double convergence B1 or B2 L3VPN respectively
On VRF (Virtual Routing Forwarding, virtual flow-line forwarding) three straton interfaces；A nodes carry PW Active/
The status bit messages such as Standby (active/standby) are sent to B node and (follow draft-ietf-pwe3-redundancy/
Draft-ietf-pwe3-redundancy-bit specifications)；
The B1 and B2 straton interfaces of L3VPN VRF tri- configuration identical IP address, by identifying PWActive/Standby
Status bit message, termination Active PW three straton interfaces will be in UP states, and issue related route；Meanwhile terminate
Standby PW three straton interfaces will be in Down states, and related route will not be issued.And then avoid uplink and downlink flow road
The inconsistent situation in footpath occurs.
The detailed process of mechanism two is as shown in Figure 3：
A nodes configure the L3VPN that active and standby PW is linked into B node, and PW terminations arrive B1 and B2；On B node corresponding to active and standby PW
Three straton interfaces configure VRRP, form VRRP backup groups；The issue base station network segment is route upwards for the B node configuration of active and standby PW accesses；
The preferential of router is issued by master/backup (active/standby) router configured in B node VRRP groups upwards
Level is different, it is possible to achieve PW single-shot list is received or single-emission and double-receiving；
The requirement of VRRP signaling flows exchanges between B-B or in core layer to be interacted, it is necessary to avoid passing through A nodes.
For above-mentioned mechanism one, on B node, PW must be man-to-man with three layer interfaces, and multiple PW can not be total to
Enjoy same three layer interface on B node, i.e., be required for taking on B node one three layers of any one PW on A nodes connect
Mouthful, bigger limitation is carried out for existing network out tape；Also, when failure occurs, B node needs the PW shapes noticed according to A nodes
State position information switches the UP/DOWN states of corresponding interface and notices related route, and Comparatively speaking, switch speed is slow, very
Difficulty meets the performance requirement of protection switching in existing network 50ms；In addition, this signaling linked manner requires that B node supports PW-
The coupling of Redundancy (redundancy) mechanism, A nodes and B node is strong, presently, there are across producer intercommunication problem.
For above-mentioned mechanism two, if link failure between two B nodes of VRRP groups, occur that VRRP is double main
Situation, i.e. between two B nodes can not interaction mode information, two B nodes can be all set to master state simultaneously, and A is saved
PW on point receives for single-shot list, therefore occurs that downlink traffic in a period of time (BSC/aGW to BTS/eNB flow) is obstructed
Situation.
In summary, the implementation system of currently used two kinds of PW+L3VPN protection schemes all there are problems that some, it is necessary to
Make improvements.
The content of the invention
In view of this, it is a primary object of the present invention to provide a kind of PW+L3VPN guard method and system, to solve
Protection switch time existing for existing PW+L3VPN protection schemes is grown, and easily occurs during link failure between gateway node double
It is primary and the problem of cause downlink traffic obstructed.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
The invention provides a kind of PW+L3VPN guard method, applied to PW+L3VPN existing network service bearer, the party
Method includes：
The active and standby pseudo-wire PW of single-emission and double-receiving attribute, the active and standby PW terminations to two three-layer networks are configured on access nodes
Artis；
The access node sends ARP information by active and standby PW to described two three-layer network artis
And routing iinformation, the ARP information and routing iinformation via the three-layer network artis in three-layer virtual special network L3VPN domains
Interior notice；
Each node configures the forwarding state of itself according to the ARP information and routing iinformation, and according to the forwarding state
Carry out corresponding forwarding respectively to uplink and downlink flow；
In network failure, entered line translation by the forwarding state of the node of fault impact, and according to the forwarding shape after conversion
State carries out corresponding forwarding to uplink and downlink flow respectively.
Preferably, this method also includes：
In described two three-layer network artis, two three layer interfaces for the active and standby PW that terminates configure identical IP address
And MAC address.
Preferably, carry out corresponding forwarding respectively to uplink and downlink flow according to the forwarding state, including：
In the upstream direction, access node is according to active and standby PW state, if main PW states are normal, along in main PW transmissions
Otherwise row flow, uplink traffic is sent to corresponding three-layer network artis along standby PW to corresponding three-layer network artis；Three-layer network
Artis carries out corresponding three layers of forward process according to the forwarding state of itself to uplink traffic；
In the downstream direction, the three-layer network artis of downlink traffic is received according to the IP/MAC information searchings of message in flow
Corresponding PW, and downlink traffic is transmitted to access node along the PW found.
Preferably, the access node need not send PW active and standby information to the three-layer network artis.
, should applied to PW+L3VPN existing network service bearer present invention also offers the protection system of PW+L3VPN a kind of
System includes：
Configuration module, for configuring the active and standby pseudo-wire PW of single-emission and double-receiving attribute on access nodes, the active and standby PW is whole
Tie to two three-layer network artis；
Information sends control module, for controlling access node to be sent out by active and standby PW to described two three-layer network artis
Send ARP information and routing iinformation, the ARP information and routing iinformation are via the three-layer network artis three
Noticed in layer virtual private network L3VPN domains；
Flow forwarding module, for controlling each node to configure the forwarding shape of itself according to the ARP information and routing iinformation
State, and carry out corresponding forwarding respectively to uplink and downlink flow according to the forwarding state；
Fault processing module, in network failure, entering line translation to the forwarding state of the node by fault impact, and
Control node carries out corresponding forwarding according to the forwarding state after conversion respectively to uplink and downlink flow.
Preferably, the configuration module is additionally operable to, in described two three-layer network artis, for the two of the active and standby PW of termination
Individual three layer interfaces configuration identical IP address and MAC address.
Preferably, the flow forwarding module is additionally operable to,
In the upstream direction, control state of the access node according to active and standby PW, if main PW states are normal, sent out along main PW
Uplink traffic is sent otherwise, uplink traffic to be sent to corresponding three-layer network artis along standby PW to corresponding three-layer network artis；Three
Layer gateway node carries out corresponding three layers of forward process according to the forwarding state of itself to uplink traffic；
In the downstream direction, control receives the three-layer network artis of downlink traffic according to the IP/MAC information of message in flow
PW corresponding to lookup, and downlink traffic is transmitted to access node along the PW found.
It is additionally operable to preferably, described information sends control module, control access node does not send PW active and standby information to institute
State three-layer network artis.
A kind of PW+L3VPN provided by the present invention guard method and system, it can realize that the gateway protection in 50ms is fallen
Change；Active and standby PW realizes the loose coupling of access node and three-layer network artis, and switch without being linked with routing mechanism
Speed is fast, is advantageous to be lifted the robustness of network, reduces O＆M complexity；VRRP need not be configured in three-layer network artis,
The problem of VRRP occurred is double main is not occurred in the mechanism two of background technology；Can be multiple connect in three-layer network artis
The PW of ingress shares same three layer interface, facilitates existing network to dispose.
Brief description of the drawings
Fig. 1 is the schematic diagram of existing PW+L3VPN based Carrying Schemes；
Fig. 2 is a kind of existing schematic diagram of PW+L3VPN protection mechanism；
Fig. 3 is the schematic diagram of existing another PW+L3VPN protection mechanism；
Fig. 4 is a kind of flow chart of PW+L3VPN of embodiment of the present invention guard method；
Fig. 5 is a kind of schematic diagram of PW+L3VPN of embodiment of the present invention protection；
Fig. 6 be the embodiment of the present invention in network under normal circumstances, be deployed with the stream of the PW+L3VPN protection mechanisms of non-linkage
Amount transmission schematic diagram；
Fig. 7 be the embodiment of the present invention when link breaks down, be deployed with the stream of the PW+L3VPN protection mechanisms of non-linkage
Amount switching schematic diagram；
Fig. 8 be the embodiment of the present invention when node breaks down, be deployed with the stream of the PW+L3VPN protection mechanisms of non-linkage
Amount switching schematic diagram；
Fig. 9 is a kind of structural representation of PW+L3VPN of embodiment of the present invention protection system.
Embodiment
The technical solution of the present invention is further elaborated with specific embodiment below in conjunction with the accompanying drawings.
A kind of PW+L3VPN provided in an embodiment of the present invention guard method, the existing network business applied to PW+L3VPN are held
Carry, as shown in figure 4, this method mainly includes below scheme：
Step 401, the active and standby PW of single-emission and double-receiving attribute is configured on access nodes, and the active and standby PW terminations are to two three
Layer gateway node.
So-called single-emission and double-receiving attribute, refer to that folk prescription sends up, received on twocouese, i.e., currently PW could send
Flow, but can receive flow in active and standby PW.
In described two three-layer network artis, two three layer interfaces for the active and standby PW that terminates configure identical IP address
With medium education (MAC) address.
Step 402, access node sends address resolution protocol by active and standby PW to described two three-layer network artis
(ARP, Address Resolution Protocol) information and routing iinformation, the ARP information and routing iinformation are via described
Three-layer network artis is noticed in L3VPN domains.
The active and standby information that access node need not send PW gives three-layer network artis.
Step 403, each node configures the forwarding state of itself according to the ARP information and routing iinformation, and according to described
Forwarding state carries out corresponding forwarding to uplink and downlink flow respectively.
In the upstream direction, access node is according to active and standby PW state, if main PW states are normal, along in main PW transmissions
Otherwise row flow, uplink traffic is sent to corresponding three-layer network artis along standby PW to corresponding three-layer network artis；Three-layer network
Artis carries out corresponding three layers of forward process according to the forwarding state of itself to uplink traffic；
In the downstream direction, the three-layer network artis of downlink traffic is received according to the IP/MAC information searchings of message in flow
Corresponding PW, and downlink traffic is transmitted to access node along the PW found.
Step 404, in network failure, entered line translation by the forwarding state of the node of fault impact, and according to conversion after
Forwarding state carry out corresponding forwarding respectively to uplink and downlink flow.
By taking the network structure shown in Fig. 5 as an example, the PW+L3VPN protection mechanisms for the non-linkage that the embodiment of the present invention proposes are：
The double PW of A nodes configuration are terminated to the L3VPN of B1 and B2 nodes respectively, and same three layer interface is configured by B1 and B2 nodes, to
The L3VPN issue base station network segments are detailed and collect routing iinformation；Double PW of A nodes keep single-emission and double-receiving state, and redundancy PW need not take
Active and standby information with PW need not link to B node, i.e., active and standby PW with routing mechanism, so as to realize that A and B node loose coupling are mutual
Connection.Base station actively sends ARP information (active and standby PW is sent out) by the PW between A and B upwards, B node obtain base station route with
ARP information, due to PW be it is double receive property, therefore downlink traffic (i.e. BSC/aGW to BTS/eNB flow) on active and standby PW all
It can receive.
In the network structure shown in Fig. 5,
Abovementioned steps 401 are specially：On A nodes, be configured to two single-emission and double-receivings to be terminated on two B nodes master,
Standby PW；On three layer interfaces on two B nodes for terminating this two PW, identical IP address and MAC are configured for it；Except this with
Outside, it is also necessary to carry out some and routinely configure, such as Interior Gateway Protocol (IGP, the Interior Gateway in each domain
Protocol) routing configuration, L3VPN domains inner boundary gateway protocol (BGP, Border Gateway Protocol) configure, are two-way
Forwarding detection (BFD, Bidirectional Forwarding Detection) configuration, VPN FRR (Fast Reroute, soon
Fast heavy-route) configuration etc..
Abovementioned steps 402 include：Active and standby PW on A nodes sends out ARP information and routing iinformation to two B nodes are double, these
Information is noticed through B node in L3VPN domains.In this step, A nodes all actively send out ARP request upwards by active and standby PW, i.e.,
There are the Host routes of base station on two B nodes and further notice other nodes of this routing iinformation into L3VPN domains, institute
A nodes can be sent to be sent to the downlink traffic of A nodes through any one in two B nodes；And simultaneously because A nodes
On active and standby PW be single-emission and double-receiving, i.e., along active and standby PW reach A nodes flow can be received by A nodes.This step is protected
The access node of base station can be reached through any one gateway node by having demonstrate,proved downlink traffic.
Abovementioned steps 403 include：The transmission of uplink traffic (flow that BSC/aGW sides are sent to from BTS/eNB sides)
Cheng Zhong, flow transmission is carried out according to active and standby PW state first on A nodes, even main PW states are normal, then send and flow along main PW
B node is measured, otherwise along for PW transmitted traffics to B node；B node further according to node state carry out corresponding at three layers of forwarding
Reason, continue up transmission flow to BSC/aGW from B node；Downlink traffic (flow i.e. from BSC/aGW sides to BTS/eNB sides)
Transmit process in, after downlink traffic reaches any one B node, B node is all in accordance with the message IP/MAC information in flow
Corresponding PW is found, and then A nodes are sent to along this PW.In this step, B node need not pay close attention to the active and standby of the PW of A nodes
State, i.e., active and standby PW need not be linked with routing mechanism.
The PW+L3VPN protection mechanisms of the embodiment of the present invention are expanded on further in conjunction with Fig. 6~8 below.
In network as shown in Figure 6, address is that 10.1.1.2 base station is linked into A1 nodes, and A1 is built to B1, B2 respectively
Two PW are found, the PW1 for specifying A1 to B1 is primary PW, and A1 to B2 PW2 is standby PW；And configure this two PW single-emission and double-receiving
Attribute and the double hair attributes of ARP；On B1 and B2 nodes, for the PW1 and PW2 that terminates two interfaces with configuring identical IP and MAC
Location；And some other conventional configurations is carried out, for example the IGP multizones on access ring and core convergence ring are disposed, the upper main PW of A1
The BGP in protection LSP configurations, core convergence ring on carrying label switched path (LSP, Label Switching Path) matches somebody with somebody
Put, the BFD based on LSP/PW is detected, multiple cases link aggregation (MC-LAG, Multi-Chassis Link Aggregation
Group), VPN FRR etc. can arrangement.
By above-mentioned with postponing, the ARP information and routing iinformation of the base station can be respectively transmitted to via PW1 and PW2 B1 and
On B2 nodes, and converged in core by the two B nodes and noticed on the L3VPN domains of ring, i.e., the downlink traffic to the base station can be with
The A1 nodes of Access Layer are correctly forwarded at any time.
In the case of network is normal, the double arrowed line in flow transmission route such as Fig. 6 between the base station and BSC/aGW
It is shown, i.e., when uplink traffic transmits, B1 nodes are sent to along primary PW on A1 nodes, B1 nodes terminate the data and for its choosing
Corresponding three layers of forwarding channel is selected, transfers it to CE1, and then be forwarded on BSC/aGW；When downlink traffic transmits, BSC/aGW
Flow is sent to by B1 nodes through CE1 according to the configurations such as MC-LAG that may be present selection, B1 according to local routing information by its
A1 nodes are forwarded to along PW1.
If A1 nodes break down to the link between B1 nodes, if being deployed with before in this case on PW1 carryings LSP
Protection, then the transmission of uplink and downlink flow is only with the protection switching for carrying out LSP aspects, i.e. PW aspects perception less than the failure,
Flow between A1 nodes and B1 nodes is transmitted along A1---B2---B1, and the flow between other nodes is still passed along original path
Send.After protection switching, the flow between base station and BSC/aGW transmits route as shown in the double arrowed line in Fig. 7.
If primary gateway B1 nodes break down, pass through certain Operations,Administration And Maintenance (OAM, Operations
Administration and Maintenance)/BFD testing mechanisms, A1 and CE1 nodes perceive the fault message respectively,
Flow switch corresponding to progress is handled.On A1 nodes, the uplink traffic to be passed for giving BSC/aGW is switched on standby PW2
Transmitted, B2 nodes are further according to transmitting path corresponding to three layers of bgp routing information selection on this node；And downlink traffic passes
During sending, flow is sent to B2 nodes by CE1 selections through CE2, and B2 nodes forward flow along PW2 according to local routing information
To A1 nodes.After protection switching, the flow between base station and BSC/aGW transmits route as shown in the double arrowed line in Fig. 8.
The PW+L3VPN protections for the non-linkage that the embodiment of the present invention proposes, it is not necessary to VRRP, Bu Huifa are configured on B node
The problem of VRRP that life occurs in mechanism two is double main；And the linkage of PW main and backup status and routing iinformation need not be carried out,
Switch speed is fast, and the access node of base station and the coupling of three-layer network artis are low, is advantageous to be lifted the robustness of network, reduces
O＆M complexity.
Corresponding above-mentioned PW+L3VPN guard method, the embodiment of the present invention additionally provide the protection system of PW+L3VPN a kind of
System, as shown in figure 9, the system includes：Configuration module 10, information are sent at control module 20, flow forwarding module 30 and failure
Manage module 40.
Wherein, configuration module 10, for configuring the active and standby PW of single-emission and double-receiving attribute, the active and standby PW on access nodes
Terminate to two three-layer network artis；
Information sends control module 20, for controlling access node by active and standby PW to described two three-layer network artis
ARP information and routing iinformation, the ARP information and routing iinformation is sent via the three-layer network artis in L3VPN domains to lead to
Accuse；
Flow forwarding module 30, for controlling each node to configure the forwarding of itself according to the ARP information and routing iinformation
State, and carry out corresponding forwarding respectively to uplink and downlink flow according to the forwarding state；
Fault processing module 40, in network failure, entering line translation to the forwarding state of the node by fault impact,
And control node carries out corresponding forwarding according to the forwarding state after conversion respectively to uplink and downlink flow.
Preferably, configuration module 10 is additionally operable to, in described two three-layer network artis, for two of the active and standby PW that terminates
Three layer interfaces configure identical IP address and MAC Address.
Preferably, flow forwarding module 30 is additionally operable to,
In the upstream direction, control state of the access node according to active and standby PW, if main PW states are normal, sent out along main PW
Uplink traffic is sent otherwise, uplink traffic to be sent to corresponding three-layer network artis along standby PW to corresponding three-layer network artis；Three
Layer gateway node carries out corresponding three layers of forward process according to the forwarding state of itself to uplink traffic；
In the downstream direction, control receives the three-layer network artis of downlink traffic according to the IP/MAC information of message in flow
PW corresponding to lookup, and downlink traffic is transmitted to access node along the PW found.
It is additionally operable to preferably, information sends control module 20, control access node does not send PW active and standby information to described
Three-layer network artis.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (8)
1. a kind of PW+L3VPN guard method, the existing network service bearer applied to PW+L3VPN, it is characterised in that this method bag
Include：
The active and standby pseudo-wire PW of single-emission and double-receiving attribute, the active and standby PW terminations to two three-layer network joints are configured on access nodes
Point；
The access node sends ARP information and road by active and standby PW to described two three-layer network artis
By information, the ARP information and routing iinformation lead to via the three-layer network artis in three-layer virtual special network L3VPN domains
Accuse；
Each node configures the forwarding state of itself according to the ARP information and routing iinformation, and according to the forwarding state to it is upper,
Downlink traffic carries out corresponding forwarding respectively；
In network failure, entered line translation by the forwarding state of the node of fault impact, and according to the forwarding state pair after conversion
Uplink and downlink flow carries out corresponding forwarding respectively.
2. PW+L3VPN guard method according to claim 1, it is characterised in that this method also includes：
In described two three-layer network artis, two three layer interfaces for the active and standby PW that terminates configure identical IP address and matchmaker
Body access control MAC address.
3. PW+L3VPN guard method according to claim 1, it is characterised in that according to the forwarding state to upper and lower
Row flow carries out corresponding forwarding respectively, including：
In the upstream direction, access node, if main PW states are normal, upstream is sent along main PW according to active and standby PW state
Corresponding three-layer network artis is measured, otherwise, uplink traffic is sent to corresponding three-layer network artis along standby PW；Three-layer network joint
Point carries out corresponding three layers of forward process according to the forwarding state of itself to uplink traffic；
In the downstream direction, the three-layer network artis for receiving downlink traffic is corresponding according to the IP/MAC information searchings of message in flow
PW, and transmit downlink traffic to access node along the PW that finds.
4. according to the PW+L3VPN of claim 1,2 or 3 guard method, it is characterised in that the access node is without hair
PW active and standby information is sent to the three-layer network artis.
5. the protection system of PW+L3VPN a kind of, the existing network service bearer applied to PW+L3VPN, it is characterised in that the system bag
Include：
Configuration module, for configuring the active and standby pseudo-wire PW of single-emission and double-receiving attribute on access nodes, the active and standby PW terminations arrive
Two three-layer network artis；
Information sends control module, for controlling access node to send ground to described two three-layer network artis by active and standby PW
Location analysis protocol ARP information and routing iinformation, the ARP information and routing iinformation are via the three-layer network artis in three layers of void
Intend noticing in dedicated network L3VPN domains；
Flow forwarding module, for controlling each node to configure the forwarding state of itself according to the ARP information and routing iinformation, and
Carry out corresponding forwarding respectively to uplink and downlink flow according to the forwarding state；
Fault processing module, in network failure, entering line translation to the forwarding state of the node by fault impact, and control
Node carries out corresponding forwarding according to the forwarding state after conversion respectively to uplink and downlink flow.
6. PW+L3VPN protection system according to claim 5, it is characterised in that the configuration module is additionally operable to, in institute
State in two three-layer network artis, identical IP address and media access control are configured for two three layer interfaces for the active and standby PW that terminates
MAC Address processed.
7. PW+L3VPN protection system according to claim 5, it is characterised in that the flow forwarding module is additionally operable to,
In the upstream direction, state of the access node according to active and standby PW is controlled, if main PW states are normal, along in main PW transmissions
Otherwise row flow, uplink traffic is sent to corresponding three-layer network artis along standby PW to corresponding three-layer network artis；Three-layer network
Artis carries out corresponding three layers of forward process according to the forwarding state of itself to uplink traffic；
In the downstream direction, control receives the three-layer network artis of downlink traffic according to the IP/MAC information searchings of message in flow
Corresponding PW, and downlink traffic is transmitted to access node along the PW found.
8. according to the PW+L3VPN of claim 5,6 or 7 protection system, it is characterised in that described information sends control mould
Block is additionally operable to, and control access node does not send PW active and standby information to the three-layer network artis.
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| CN201210173786.8A CN103457817B (en) | 2012-05-30 | 2012-05-30 | The guard method of PW+L3VPN a kind of and system |
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| CN105207792A (en) * | 2014-05-30 | 2015-12-30 | 中国电信股份有限公司 | Non-linkage pseudo wire gateway protection system and pseudo wire gateway protection method thereof |
| CN104243264B (en) * | 2014-09-03 | 2017-11-07 | 烽火通信科技股份有限公司 | Pseudo-wire PW uses N:1 model accesses L3VPN system and method |
| CN105391641A (en) * | 2014-09-03 | 2016-03-09 | 中兴通讯股份有限公司 | Message forwarding method and device in private network |
| CN107222405B (en) * | 2017-06-26 | 2020-06-02 | 杭州绿湾网络科技有限公司 | Data transmission method and system |
| CN110166286A (en) * | 2019-04-30 | 2019-08-23 | 中时讯通信建设有限公司 | A kind of IP RAN network system |
| CN110505645B (en) * | 2019-09-30 | 2023-03-24 | 北京百度网讯科技有限公司 | Communication mode control method and device, electronic equipment and communication device |
| CN114124670A (en) * | 2021-11-03 | 2022-03-01 | 中盈优创资讯科技有限公司 | STN network equipment port migration method and device |
| CN117641411A (en) * | 2022-08-17 | 2024-03-01 | 华为技术有限公司 | Data transmission method, communication system and route release method |
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| CN101075937A (en) * | 2007-07-20 | 2007-11-21 | 华为技术有限公司 | Method, system and apparatus for converting message in three-layer virtual special network |
| CN101572666A (en) * | 2009-06-05 | 2009-11-04 | 杭州华三通信技术有限公司 | Method and device for flow switching in Virtual Private LAN Service (VPLS) network |
| WO2011054263A1 (en) * | 2009-11-03 | 2011-05-12 | 中兴通讯股份有限公司 | Access method and access system for layer 3 virtual private networks(vpn) |
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