CN102684973B - A kind of method and system of looped network protection - Google Patents
A kind of method and system of looped network protection Download PDFInfo
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Abstract
The present invention provides a kind of method and system of looped network protection, and the method is applied to multiprotocol label switching (MPLS) series of network of the intersecting ring intersected with binode, and the method includes：Label switched path (LSP) to one group of same paths across 2 or more than 2 intersecting rings; member (SPME) and protection SPME are safeguarded for this group of LSP configuration work subpath on each correlative link; and enter link point in the 1st intersecting ring and the 2nd intersecting ring goes out between link point, configure a transannular in opposite direction in the intersecting ring with this group of LSP and protect SPME；It is described enter link point receiving the message that indicates that the transannular link between the 1st intersecting ring and the 2nd intersecting ring breaks down, and when judging that the work SPME of the 1st intersecting ring has failure of connectivity, enable the transannular and protect SPME to carry out business transmission.The protection of the failure of the transannular link to binode intersecting ring can be supported by the present invention.
Description
Technical field
The present invention relates to MPLS series of network business scope, more particularly to a kind of method and system of looped network protection.
Background technology
Under the promotion of telecommunication service IPization trend, net loaded business is transmitted from time division multiplex (Time Division
Multiplexing, abbreviation TDM) based on to based on IP (Internet Protocol, Internet Protocol) change, this
Be accomplished by one kind can effective transmission packe business, and provide carrier class operation management maintainance (Operations
Administration and Maintain, abbreviation OAM) and protection packet transport technologies.Under this demand, industry is proposed
The concept of Packet Transport Network (Packet Transport Network, abbreviation PTN), multiprotocol label switching transport frame
(Transport Profile for Multi-Protocol Label Switching, abbreviation MPLS-TP) is exactly a kind of PTN
Technology.
MPLS-TP be based in MPLS (multiprotocol label switching) technical foundation, enhance be adapted to transmission need one
A little features, including powerful OAM and good survivability (including linear protection, looped network protection etc.), while eliminating some not
Beneficial to the complexity in terms of IP that uses of transmission, such as：Tag fusion, the last two jump ejection etc..
Looped network protection is one of survivability demand of MPLS-TP (specific demand is shown in 2.5 chapters and sections of RFC5654).Wherein,
Monocyclic protection has different technologies scheme and provides support, but transannular protection, at present in IETF (Internet Engineering
Task Force, Internet Engineering Task group) specific solution is not also proposed in normal structure.
The networking mode of intersecting ring mainly has 2 kinds：
(1) single node intersects：2 rings intersect on 1 node；
(2) binode intersects：2 rings intersect on 2 nodes.
Wherein, the intersecting mode of binode is because 2 crossed nodes can give mutual protection, it is to avoid in single node intersecting mode
Interconnecting nodes failure and cause business can not protected situation, so more commonly used.And for LSP (Label
Switched Path, label switched path) binode transannular protection, need to solve following demand：
Support the protection to ring crossed node or link failure；
Each ring in support intersecting ring has the situation of 0,1 or more than one failure, as long as and still having path
Reachable, business should not just be interrupted；
For the protection of those transannulars LSP, it should do not affect the monocyclic protection of other not LSP of transannular；
For the protection situation in (1) (2), protection switch time is less than 50 milliseconds, and should not introduce when switching sluggishness
Between.
In current normal structure, ITU-T (International Telecommunication Union's telecommunication standardsization tissue) has been formulated for SDH
The protective standard (G.842) of the dual node interconnection of (SDH), but the scene that the dual node interconnection is suitable for is fixed
, that is, require that each ring for interconnecting there are two nodes to be interconnected, and require that crossed node needs to support drop-and-
Continue (separate and continue) function.In addition, the forwarding mechanism of SDH and the forwarding mechanism of MPLS-TP are different, therefore,
It is technical that this binode protection mechanism of SDH can not be used directly in MPLS-TP.
In existing MPLS series of network, in particularly MPLS-TP, using SPME (Sub-Path Maintenance
Element, subpath safeguard member) the main realization mechanism of the monocyclic protection that carries out looped network is：In protected link or quilt
A work SPME is created in protection section, is that work SPME creates a protection SPME then along the rightabout of ring,
Linear protection structure is used on SPME, this protected mode can reduce the quantity of the Protection path of configuration, this also exactly MPLS-
One of TP protection demands (minimize the quantity of Protection path).The guard method of this employing SPME needs label pop down, internal layer
LSP label replaces with LSP in the end node of work SPME or protection SPME and is working or protecting the peer node of SPME know
Other label, and it is pressed into the label of SPME.But the structure for how using this SPME is not given in MPLS-TP standards
Realize the protection to the business through interconnected ring.
This patent extends the SPME schemes of monocyclic protection, intersects the multi-ring situation of networking mode for binode, for
The LSP through multiple intersecting rings in one group of same path, it is proposed that a kind of new utilization SPME carries out the method for unifying to protect.Make
Obtain on the premise of each monocyclic protection of itself is not affected, the demand of the binode transannular protection for proposing above can be met.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of method and system of looped network protection, to support to binode phase
The protection of the failure of the transannular link in cross ring.
In order to solve above-mentioned technical problem, the invention provides a kind of method of looped network protection, is applied to binode
Multiprotocol label switching (MPLS) series of network of intersecting intersecting ring, the method include：
Label switched path (LSP) to one group of same paths across 2 or more than 2 intersecting rings, in each correlative link
It is upper to safeguard member (SPME) for this group of LSP configuration work subpath and protect SPME, and enter link point and the in the 1st intersecting ring
2 intersecting rings go out between link point, configure a transannular protection SPME in opposite direction in the intersecting ring with this group of LSP；
It is described enter link point receiving the transannular link that indicates between the 1st intersecting ring and the 2nd intersecting ring occur therefore
The message of barrier, and when judging that the work SPME of the 1st intersecting ring has failure of connectivity, enabling the transannular protection SPME is carried out
Business is transmitted.
Further, said method also has following feature：It is described enter link point enable transannular protection SPME and carry out
Business transmission is achieved in the following ways：
It is described enter link point the message vpn label of this group of LSP replaced with into default this group of LSP go out in the 2nd intersecting ring
Link point enters label information, and the packet outer layer label of this group of LSP is replaced with the label that the transannular protects SPME, Ran Houtong
Cross the transannular protection SPME and notify that the link point that of the 2nd intersecting ring is switched to the transannular protection SPME.
Further, said method also has following feature：It is described enter link point enable transannular protection SPME and carry out
Business is transmitted, and is also included：2nd intersecting ring goes out after link point receives and be switched to the notice of transannular protection SPME, switching
SPME is protected to the transannular.
Further, said method also has following feature：The link point that goes out of the 2nd intersecting ring is switched to the transannular guarantor
After the step of shield SPME, also include：
The link point that goes out of the 2nd intersecting ring enters the 1st intersecting ring that be sent to for receiving after the message of link point,
Being this group of LSP by the tag replacement of the message enters label what the 1st intersecting ring entered link point, this enter be pressed on label it is described
Transannular protects the label of SPME, sends the message along transannular protection SPM2 afterwards.
Further, said method also has following feature：The method also includes：
To the transannular link configuration between each intersecting ring and run detection of connectivity or connectivity verification,
The message that the transannular link breaks down is to indicate that message enters link point described in being sent to by link failure.
Further, said method also has following feature：
This group of LSP goes out ring across N number of intersecting ring, also what the 1st intersecting ring entered link point and 3～M intersecting ring
Between node, a transannular protection SPME in opposite direction in the intersecting ring with this group of LSP, N >=3,3≤M are respectively configured
≤N；
It is described enter link point receive the link between the node that instruction i-th -1 is intersected with i-th intersecting ring occur therefore
The message of barrier, and when judging that the work SPME of the 1st intersecting ring has failure of connectivity, enables and enters ring from the 1st intersecting ring
Node carries out business transmission to the transannular protection SPME gone out between link point of i-th intersecting ring, wherein, 3≤i≤M.
Further, said method also has following feature：The MPLS series of network includes：Multiprotocol label switching is passed
Defeated framework (MPLS-TP) network.
In order to solve the above problems, the present invention also provides a kind of system of looped network protection, and the multiprotocol label being applied to is handed over
(MPLS) series of network is changed, the system includes the intersecting intersecting ring of binode, it is characterised in that the system also includes：
Configuration module, for the label switched path (LSP) to one group of same paths across 2 or more than 2 intersecting rings,
Member (SPME) and protection SPME are safeguarded for this group of LSP configuration work subpath on each correlative link, and in the 1st intersecting ring
Enter link point and the 2nd intersecting ring go out between link point, configure one with this group of LSP in the intersecting ring it is in opposite direction across
Ring protection SPME；
Enter the network node of link point as the 1st intersecting ring, for the 1st intersecting ring of instruction being received with the 2nd
The message that transannular link between intersecting ring breaks down, and judge that the work SPME of the 1st intersecting ring has failure of connectivity
When, enabling the transannular protection SPME carries out business transmission.
Further, said system also has following feature：The network section for entering link point as the 1st intersecting ring
Point, enables transannular protection SPME and carries out business transmission and be achieved in the following ways：
By the message vpn label of this group of LSP replace with default this group of LSP the 2nd intersecting ring go out link point enter mark
The packet outer layer label of this group of LSP is replaced with the label that the transannular protects SPME, is then protected by the transannular by label information
Shield SPME notifies that the link point that of the 2nd intersecting ring is switched to the transannular protection SPME.
Further, said system also has following feature：Go out the network node of link point as the 2nd intersecting ring, use
After receiving and being switched to the notice of transannular protection SPME, the transannular protection SPME is switched to.
Further, said system also has following feature：Go out the network node switching of link point as the 2nd intersecting ring
To after transannular protection SPM, the 1st intersecting ring that be sent to for being additionally operable to receive enters after the message of link point, should
The tag replacement of message is this group of LSP enters label what the 1st intersecting ring entered link point, enters at this
The label of protection SPME, sends the message along transannular protection SPM2 afterwards.
Further, said system also has following feature：
The configuration module, be additionally operable to the 1st intersecting ring enter link point and 3～M intersecting ring go out link point it
Between, a transannular protection SPME in opposite direction in the intersecting ring with this group of LSP is respectively configured, this group of LSP is across N number of described
Intersecting ring, N >=3,3≤M≤N；
The network node for entering link point as the 1st intersecting ring, is additionally operable to receiving instruction i-th -1 and i-th
The message that link between the intersecting node of intersecting ring breaks down, and judge that the work SPME of the 1st intersecting ring has connection
Property failure when, enable from the 1st intersecting ring enter link o'clock to i-th intersecting ring go out link point transannular protection SPME
The business of carrying out transmission, wherein, 3≤i≤M.
Further, said system also has following feature：The MPLS series of network includes：Multiprotocol label switching is passed
Defeated framework (MPLS-TP) network.
The present invention provides a kind of method and system of looped network protection, can support to the intersecting section of ring in binode intersecting ring
Point and its between link failure protection, if each ring in intersecting ring has the situation of 0,1 or more than one failure,
As long as still having path reachable, so that it may to ensure that business is not interrupted.
Description of the drawings
Exemplary plots of the Fig. 1 for the binode intersecting ring of prior art；
Fig. 2 is the flow chart of the method for the looped network protection of the present invention；
Schematic diagrams of the Fig. 3 for two binode intersecting rings of the embodiment of the present invention；
Schematic diagrams of the Fig. 4 for multiple binode intersecting rings of one embodiment of the invention；
Schematic diagrams of the Fig. 5 for multiple binode intersecting rings of another embodiment of the present invention；
Schematic diagrams of the Fig. 6 for multiple binode intersecting rings of yet another embodiment of the invention；
Flow charts of the Fig. 7 for the method for the looped network protection of one embodiment of the invention；
Fig. 8 is the schematic diagram of two binode intersecting rings that the interconnecting link of the embodiment of the present invention breaks down.
Specific embodiment
For convenience, several abbreviations are introduced in the present invention：
LSP is main to cross circling point：Under normal circumstances, i.e., when fault-free occurs, work LSP enters another from a ring by this o'clock
Individual ring；
LSP is standby to cross circling point：In i.e. two ring joinings, non-master crosses another joining of circling point；
Transannular LSP groups：The LSP through multiple intersecting rings in one group of same path.This group of LSP will meet following condition：
This group of LSP must be intersecting rings multiple through identical, i.e., will transannular；
Paths of this group of LSP in each intersecting ring passed through will be identical.As the LSP1 and LSP2 in Fig. 1 is exactly
Same path, and LSP1 and LSP3 are not just.
Ring is two-way unreachable：Between any two node on i.e. monocyclic, no matter along the path clockwise of ring, also
It is the counterclockwise path along ring, there is span failure or node failure.
It is prior art that LSP is formed in intersecting ring, is just repeated no more here.
The method of the looped network protection of the present invention is through multiple binode intersecting rings using SPME to one group of same path
LSP, unification carries out the implementation method of transannular protection, as described in Figure 2, mainly includes the following steps that：
S10, configuration step：Label switched path (LSP) to one group of same paths across 2 or more than 2 intersecting rings,
Member (SPME) and protection SPME are safeguarded for this group of LSP configuration work subpath on each correlative link, and in the 1st intersecting ring
Enter link point and the 2nd intersecting ring go out between link point, configure one with this group of LSP in the intersecting ring it is in opposite direction across
Ring protection SPME；
S20, transannular protection step：It is described enter link point indicate between the 1st intersecting ring and the 2nd intersecting ring receiving
The message that breaks down of transannular link, and when judging that the work SPME of the 1st intersecting ring has failure of connectivity, enable described
Transannular protection SPME carries out business transmission.
In step S20, it is described enter link point enable transannular protection SPME to carry out business transmission being in the following manner
Realize：
It is described enter link point the message vpn label of this group of LSP replaced with into default this group of LSP go out in the 2nd intersecting ring
Link point enters label information, and the packet outer layer label of this group of LSP is replaced with the label that the transannular protects SPME, Ran Houtong
Cross the transannular protection SPME and notify that the link point that of the 2nd intersecting ring is switched to the transannular protection SPME.
Wherein, it is described enter link point enable transannular protection SPME and carry out business transmission, can also include：2nd phase
Going out after link point receives and be switched to the notice of transannular protection SPME for cross ring, is switched to the transannular protection SPME.
After the going out the step of link point is switched to transannular protection SPME of the 2nd intersecting ring, can also include：
The link point that goes out of the 2nd intersecting ring enters the 1st intersecting ring that be sent to for receiving after the message of link point,
Being this group of LSP by the tag replacement of the message enters label what the 1st intersecting ring entered link point, this enter be pressed on label it is described
Transannular protects the label of SPME, sends the message along transannular protection SPM2 afterwards.
When this group of LSP is across 3 intersecting rings, below step can also be included：
Enter the going out between link point of link point and 3～M intersecting ring in the 1st intersecting ring, be respectively configured one with should
Transannular protection SPME group LSP in opposite direction in the intersecting ring, N >=3,3≤M≤N；
It is described enter link point receive the link between the node that instruction i-th -1 is intersected with i-th intersecting ring occur therefore
The message of barrier, and when judging that the work SPME of the 1st intersecting ring has failure of connectivity, enables and enters ring from the 1st intersecting ring
Node carries out business transmission to the transannular protection SPME gone out between link point of i-th intersecting ring, wherein, 3≤i≤M.
Using the method for the present invention, can be by better simply configuration, it is possible to one group of same path through multiple
The LSP of binode intersecting ring carries out unified transannular protection, so as to greatly reduce the quantity of Protection path, and supports to ring
The protection of link failure between crossed node (crossing link point as main) or crossed node.
The method of the looped network protection of the present invention is described in detail with specific embodiment below.
When building their networks needs the configuration being previously-completed to include following several parts：
First, according to the SPME mechanism of existing monocyclic protection, it is 1 transannular LSP group (i.e. process in one group of same path
The LSP of N number of intersecting ring, wherein, N >=2), in each ring for passing through according to steering (source routing) SPME mode, from across
Enter link point of the ring LSP groups on certain ring starts, along the path that LSP is passed through, until which goes out link point in the ring, configuration
One work SPME；Further along work opposite directions of the SPME on the ring, to configure which between link point right entering link point and go out
The monocyclic protection SPME for answering.
As shown in figure 3, the work SPME1 that configures in ring 1 of the transannular LSP groups comprising LSP1 and LSP2 and monocyclic protection
SPME2, and the work SPME3 that configures in ring 2 and monocyclic protection SPME4.
In addition, being this group of transannular LSP according to embodiments of the present invention, distinguish in the link point that enters into the 1st intersecting ring
And go out between link point from the 2nd to what m-th intersecting ring was gone out, it is respectively configured one with the LSP in the intersecting ring
Transannular protection SPME in opposite direction, wherein, 2≤M≤N.
Wherein, as N=M=2, the transannular of configuration protection SPME transannular protection SPME2 as shown in Figure 3 be (process
Node is：A-B-D-F-H-J-I)；As M=2 and M ＜ N, the transannular protection SPME transannular protections as shown in Figure 4 of configuration
SPME2；As 2 ＜ M ＜ N, the transannular protection SPME transannulars as shown in Figure 5 of configuration protect SPME2 to protect SPME to transannular
M；As M=N, the transannular protection SPME transannulars as shown in Figure 6 of configuration protect SPME2 to protect SPME N to transannular.
Entering on link point in transannular LSP groups, is that each LSP included in the group configures which and goes out ring in last ring
Node enters label information.Protection SPME can be a plurality of LSP of protection, configures which and goes out entering for link point in last ring
Label information be able to can recognize on the Egress node of SPME be any bar LSP business, and then replace with correct LSP label
It is further continued for forwarding.
As shown in Figure 3, A nodes configure LSP1 and LSP2 respectively enter label L1 and L2 in inode；If double
To if LSP, will also inode configure LSP1 and LSP2 respectively enter label L3 and L4 in A nodes.As shown in figs. 4-6,
A nodes configure LSP1 and LSP2 respectively enter label L1 and L2 in R nodes；If if bidirectional LSP, will also save in R
Point configuration LSP1 and LSP2 respectively enter label L3 and L4 in A nodes.
Configure on the work SPME and monocyclic protection SPME of each ring and run detection of connectivity end to end
(Continuity Check, abbreviation CC) or connectivity verification (Connectivity Verification, abbreviation CV) detection, together
The CC/CV that Section (section) layer is configured and run on the node of Shi Huan interconnecting links carrys out the connection of real-time detection interconnecting link
Property.
Configure based on more than, the present embodiment includes below step based on the transannular protection scheme of SPME, as shown in Figure 7：
Step 101, the node at ring interconnecting link (also referred to as transannular link) two ends (can main cross circling point, or standby
Cross circling point) if CC/CV messages are not received within the regular hour, then it is assumed that break down on this interconnecting link, that
Detect LDI (Link Down Indication, link that the node of failure is concentrated by MPLS-TP OAM(Operation Administration Maintenance)s immediately
Indicating fault) function is to all LSP through this interconnecting link, wherein the LSP1 and LSP2 in just including example) or Jing
The SPME (such as the SPME2 and SPME4 in Fig. 3) for crossing this interconnecting link sends notice, and so, what transannular LSP groups were common enters ring
Node will receive LDI messages.
Step 102, transannular LSP groups enter link point by receiving LDI notice messages, judge the work SPME of itself
The state of (i.e. the work SPME of ring 1), if the work SPME of itself has failure of connectivity, turns to step 103；If itself
There is no failure of connectivity in work SPME, then turn to step 104.
Specifically, if the link point that enters of transannular LSP groups is not received for the indicating ring intersecting paths event that circling point is sent is crossed
The LDI notices of barrier, then all failures are all according to monocyclic troubleshooting；If have received for the instruction interconnected strands that circling point is sent are crossed
The LDI notices of road failure, then judge whether failure of connectivity is there is also on work SPME.
Step 103, start corresponding with the interconnecting link for breaking down transannular protection SPME and carry out business transmission；
If also broken down on work SPME, can determine that work SPME crosses circling point to there is ring two-way unreachable with main,
Then enter link point to determine to walk transannular protection SPME, specially：Enter link point to replace according to the label of the SPME schemes of looped network protection
The message vpn label of the LSP in all transannular LSP groups is substituted for what the LSP broke down in interconnecting link by the system of changing planes
The label information that enters for going out link point on latter ring, then the packet outer layer label of LSP replaces with corresponding transannular protection SPME
Label.Meanwhile, enter the PSC message that link point protects SPME transmissions by the transannular, notify that business is switched to by peer node
On transannular protection SPME.The peer node of transannular protection SPME receives the PSC (pretection switch coordination) for indicating transannular protection
After message, business is switched on transannular protection SPME.
Step 104, any switching action is not performed.
More than extension SPME transannular protection scheme, it is adaptable to the situation that more than 2 rings intersect, below divide several scenes
Application example to the present invention transannular protection scheme be described in detail.
In the scene of Fig. 3, when the interconnecting link (link i.e. between EF) of two rings breaks down, as shown in figure 8, ring 1
Intersecting in E and F with ring 2, a two-way transannular LSP group includes LSP1 and LSP2, enters ring from the A nodes of ring 1, and the path of process is
A-->C-->E-->G-->I, finally the inode in ring 2 go out ring.
The work SPME1 and monocyclic protection SPME2 of transannular LSP groups are configured in ring 1, transannular LSP is configured in ring 2
The work SPME3 and monocyclic protection SPME4 of group；And a transannular is configured along clockwise direction between node A and node I
Protection SPME2.Ring 1 enter link point A configuration LSP1 ring 2 go out link point I enter label L1, and LSP2 in ring 2
Go out link point I enters label L2.Ring 2 enter link point I configuration LSP1 ring 1 go out link point A enter label L3, and
LSP2 ring 1 go out link point A enter label L4.Configure and run end-to-end in the work SPME and protection SPME of each ring
CC/CV detection, while configure on interconnecting link EF and run Section layers CC/CV detection.
When the standby circling point F that crosses has found that interconnecting link EF has failure, then send to client layer (i.e. monocyclic protection SPME2) immediately
LDI accuses message.
A receives the LDI messages that F sends, and is detected simultaneously by there is also failure of connectivity on work SPME1, then can determine that
Work SPME and it is main cross circling point E to there is ring two-way unreachable, then A determines to walk transannular protection SPME, then by the message of LSP1
The message vpn label of LSP2 is substituted for L2 into L1 by layer tag replacement, then on the packet outer layer label stack of LSP1 and LSP2
Press-in transannular protects the label of SPME2；Node A protects SPME2 to send PSC messages to node I along transannular simultaneously, notifies node
I is also switched to business on transannular protection SPME5 and sends and receives.
After node I receives the PSC messages for starting transannular protection, be switched to and service message received from transannular protection SPME5,
And the tag replacement by the message for receiving in the reverse direction from LSP is the label that enters in A nodes, is pressed on to that tag afterwards
Enter the label that transannular protects SPME2, node A is sent traffic to along transannular protection SPME2.
In the scene of Fig. 5 or 6, transannular LSP groups through more than two intersecting ring, in this scenario, when between ring 1 and ring 2
Interconnecting link when breaking down, A receive it is standby cross the LDI messages that link point F sends, be detected simultaneously by work SPME1
There is failure of connectivity, then enabling transannular protection SPME2 carries out business transmission.
Protected by transannular during SPME2 carries out business transmission link point A is entered, if the interconnection between ring 2 and ring 3
Link breaks down, and A can protect SPME2 to receive the LDI reports that link point is sent standby excessively between ring 2 and ring 3 by transannular
Text, in this case, due to the existing failure of connectivitys of SPME1 that work, therefore enters link point A and enables transannular protection SPME3
The business of carrying out transmission.In the same manner, protected by transannular during SPME3 carries out business transmission entering link point A, if ring 3 and ring 4
Between interconnecting link break down, A can protect SPME3 receive the standby link point of crossing between ring 3 and ring 4 by transannular and send out
The LDI messages for coming, in this case, due to the existing failure of connectivitys of SPME1 that work, therefore enter link point A and enable transannular guarantor
Protect SPME4 to carry out business transmission.By that analogy, enter link point A by transannular protect SPME M-1 carry out business transmission
During, if the interconnecting link between ring M-1 and ring M breaks down, A can protect SPME M-1 to receive ring M- by transannular
The standby LDI messages that link point is sent excessively between 1 and ring M, in this case, due to the existing failure of connectivitys of SPME1 that work,
Therefore enter link point A to enable transannular protection SPME M to carry out business transmission.
The present invention also provides a kind of system of looped network protection, the multiprotocol label switching being applied to (MPLS) series of network,
The system includes the intersecting intersecting ring of binode, and the system also includes：Configuration module, wherein
Configuration module, for the label switched path (LSP) to one group of same paths across 2 or more than 2 intersecting rings,
Member (SPME) and protection SPME are safeguarded for this group of LSP configuration work subpath on each correlative link, and in the 1st intersecting ring
Enter link point and the 2nd intersecting ring go out between link point, configure one with this group of LSP in the intersecting ring it is in opposite direction across
Ring protection SPME；
Enter the network node of link point as the 1st intersecting ring, for the 1st intersecting ring of instruction being received with the 2nd
The message that transannular link between intersecting ring breaks down, and judge that the work SPME of the 1st intersecting ring has failure of connectivity
When, enabling the transannular protection SPME carries out business transmission.
Wherein, the configuration module can be a submodule of OAM modules.
Wherein, the network node for entering link point as the 1st intersecting ring, enables the transannular protection SPME and enters industry
Business transmission can be accomplished by：
By the message vpn label of this group of LSP replace with default this group of LSP the 2nd intersecting ring go out link point enter mark
The packet outer layer label of this group of LSP is replaced with the label that the transannular protects SPME, is then protected by the transannular by label information
Shield SPME notifies that the link point that of the 2nd intersecting ring is switched to the transannular protection SPME.
Further, go out the network node of link point as the 2nd intersecting ring, the transannular protection is switched to for receiving
After the notice of SPME, the transannular protection SPME is switched to.
After the network node for going out link point as the 2nd intersecting ring is switched to the transannular protection SPM, it is additionally operable to connect
Being sent to of receiving be after the 1st intersecting ring enter the message of link point, is this group of LSP in the 1st phase by the tag replacement of the message
What cross ring entered link point enters label, enters the label that is pressed on label that the transannular protects SPME at this, afterwards along the transannular
Protection SPM2 sends the message.
In a preferred embodiments, the configuration module is additionally operable to enter link point and the 3～M phase in the 1st intersecting ring
Going out between link point for cross ring, is respectively configured a transannular protection SPME in opposite direction in the intersecting ring with this group of LSP,
This group of LSP is across N number of intersecting ring, N >=3,3≤M≤N；Networking diagram is referred to Fig. 3-Fig. 6.
The network node for entering link point as the 1st intersecting ring, is additionally operable to receiving instruction i-th -1 and i-th
The message that link between the intersecting node of intersecting ring breaks down, and judge that the work SPME of the 1st intersecting ring has connection
Property failure when, enable from the 1st intersecting ring enter link o'clock to i-th intersecting ring go out link point transannular protection SPME
The business of carrying out transmission, wherein, 3≤i≤M.
One of ordinary skill in the art will appreciate that all or part of step in said method can be instructed by program
Related hardware is completed, and described program can be stored in computer-readable recording medium, such as read only memory, disk or CD
Deng.Alternatively, all or part of step of above-described embodiment can also be realized using one or more integrated circuits.Accordingly
Ground, each module/unit in above-described embodiment can be realized in the form of hardware, it would however also be possible to employ the shape of software function module
Formula is realized.The present invention is not restricted to the combination of the hardware and software of any particular form.
The preferred embodiments of the present invention are these are only, certainly, the present invention can also there are other various embodiments, without departing substantially from this
In the case of spirit and its essence, those of ordinary skill in the art work as and can make various corresponding changes according to the present invention
And deformation, but these corresponding changes and deformation should all belong to the protection domain of appended claims of the invention.
Claims (11)
1. a kind of method of looped network protection, is applied to multiprotocol label switching (MPLS) system with the intersecting intersecting ring of binode
Row network, the method include：
Label switched path (LSP) to one group of same paths across 2 or more than 2 intersecting rings, on each correlative link be
This group of LSP configuration work subpath safeguards member (SPME) and protection SPME, and enters link point and the 2nd in the 1st intersecting ring
Intersecting ring goes out between link point, configures a transannular protection SPME in opposite direction in the intersecting ring with this group of LSP；
It is described enter link point receiving what the transannular link that indicates between the 1st intersecting ring and the 2nd intersecting ring broke down
Message, and when judging that the work SPME of the 1st intersecting ring has failure of connectivity, enabling the transannular protection SPME carries out business
Transmission；
It is described enter link point enable transannular protection SPME and carry out business transmission and be achieved in the following ways：
It is described enter link point the message vpn label of this group of LSP replaced with into default this group of LSP go out link in the 2nd intersecting ring
That what is put enters label information, the packet outer layer label of this group of LSP is replaced with the label that the transannular protects SPME, then by institute
State transannular protection SPME and notify that the link point that of the 2nd intersecting ring is switched to the transannular protection SPME.
2. the method for claim 1, it is characterised in that it is described enter link point enable the transannular protection SPME and enter industry
Business transmission, also includes：
Going out after link point receives and be switched to the notice of transannular protection SPME for 2nd intersecting ring, is switched to the transannular and protects
Shield SPME.
3. method as claimed in claim 2, it is characterised in that the link point that goes out of the 2nd intersecting ring is switched to the transannular and protects
After the step of shield SPME, also include：
The link point that goes out of the 2nd intersecting ring enters the 1st intersecting ring that be sent to for receiving after the message of link point, should
The tag replacement of message is this group of LSP enters label what the 1st intersecting ring entered link point, enters at this
The label of protection SPME, sends the message along transannular protection SPM2 afterwards.
4. the method for claim 1, it is characterised in that the method also includes：
To the transannular link configuration between each intersecting ring and run detection of connectivity or connectivity verification,
The message that the transannular link breaks down is to indicate that message enters link point described in being sent to by link failure.
5. the method for claim 1, it is characterised in that：
This group of LSP goes out link point across N number of intersecting ring, also what the 1st intersecting ring entered link point and 3～M intersecting ring
Between, it is respectively configured a transannular protection SPME in opposite direction in the intersecting ring with this group of LSP, N >=3,3≤M≤N；
It is described enter link point receiving what the link between the node that instruction i-th -1 is intersected with i-th intersecting ring broke down
Message, and when judging that the work SPME of the 1st intersecting ring has failure of connectivity, enables and enters link point from the 1st intersecting ring
The transannular protection SPME gone out between link point to i-th intersecting ring carries out business transmission, wherein, 3≤i≤M.
6. the method as described in any one of claim 1-5, it is characterised in that：The MPLS series of network includes：Multi-protocols mark
Sign and exchange transport frame (MPLS-TP) network.
7. a kind of system of looped network protection, the multiprotocol label switching being applied to (MPLS) series of network, the system include binodal
The intersecting intersecting ring of point, it is characterised in that the system also includes：
Configuration module, for the label switched path (LSP) to one group of same paths across 2 or more than 2 intersecting rings, every
Member (SPME) and protection SPME are safeguarded for this group of LSP configuration work subpath on one correlative link, and enters ring in the 1st intersecting ring
Node and the 2nd intersecting ring go out between link point, configure a transannular in opposite direction in the intersecting ring with this group of LSP and protect
Shield SPME；
Enter the network node of link point as the 1st intersecting ring, for receive indicate the 1st intersecting ring intersect with the 2nd
The message that transannular link between ring breaks down, and when judging that the work SPME of the 1st intersecting ring has failure of connectivity, open
Business transmission is carried out with transannular protection SPME；
The network node for entering link point as the 1st intersecting ring, enabling transannular protection SPME and carrying out business transmission is
It is accomplished by：
The message vpn label of this group of LSP is replaced with default this group of LSP to believe in the label that enters that the 2nd intersecting ring goes out link point
The packet outer layer label of this group of LSP is replaced with the label that the transannular protects SPME, is then protected by the transannular by breath
SPME notifies that the link point that of the 2nd intersecting ring is switched to the transannular protection SPME.
8. system as claimed in claim 7, it is characterised in that
Go out the network node of link point as the 2nd intersecting ring, be switched to after the notice of the transannular protection SPME for receiving,
It is switched to the transannular protection SPME.
9. system as claimed in claim 8, it is characterised in that
After the network node for going out link point as the 2nd intersecting ring is switched to the transannular protection SPM, it is additionally operable to receive
Be sent to after the 1st intersecting ring enter the message of link point, be this group of LSP in the 1st intersecting ring by the tag replacement of the message
Enter link point enters label, enters to be pressed into the label that the transannular protects SPME on label at this, protects along the transannular afterwards
SPM2 sends the message.
10. system as claimed in claim 7, it is characterised in that
The configuration module, is additionally operable to enter the going out between link point of link point and 3～M intersecting ring in the 1st intersecting ring, point
Not Pei Zhi a transannular protection SPME in opposite direction in the intersecting ring with this group of LSP, this group of LSP is across N number of described intersecting
Ring, N >=3,3≤M≤N；
The network node for entering link point as the 1st intersecting ring, is additionally operable to intersect with i-th receiving instruction i-th -1
The message that link between the intersecting node of ring breaks down, and judge that the work SPME of the 1st intersecting ring has connective event
During barrier, enabling from the link o'clock that enters of the 1st intersecting ring is carried out to the transannular protection SPME gone out link point of i-th intersecting ring
Business is transmitted, wherein, 3≤i≤M.
11. systems as described in any one of claim 7-10, it is characterised in that the MPLS series of network includes：Multi-protocols
Tag switching transport frame (MPLS-TP) network.
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| CN102739432A (en) * | 2011-03-30 | 2012-10-17 | 中兴通讯股份有限公司 | Transmission method and system of span-ring service |
| CN102882757B (en) * | 2012-09-25 | 2015-01-28 | 华为技术有限公司 | Point-to-multipoint service protecting method for ring network and upper ring node in ring network |
| CN106982161B (en) * | 2012-11-22 | 2020-07-24 | 华为技术有限公司 | Method and equipment for keeping and deleting label in ring network protection |
| CN103856404B (en) * | 2013-12-24 | 2017-06-27 | 华为技术有限公司 | Data transmission method, device and system in a kind of looped network |
| CN104579785B (en) * | 2015-01-19 | 2018-07-31 | 新华三技术有限公司 | A kind of looped network protecting method and device |
| CN106572024A (en) * | 2015-10-09 | 2017-04-19 | 中兴通讯股份有限公司 | Method and apparatus for preventing flow storm caused by network shared ring protection |
| CN107592251A (en) * | 2016-07-08 | 2018-01-16 | 中兴通讯股份有限公司 | The method of shared ring transannular networking structure and transannular Business Stream forwarding |
| CN107809783B (en) * | 2017-09-08 | 2021-07-30 | 深圳市盛路物联通讯技术有限公司 | Data transmission system of Internet of things and first repeater |
| CN111726287B (en) * | 2020-07-13 | 2022-01-25 | 中国联合网络通信集团有限公司 | Ring network protection method and device |
| CN115296955B (en) * | 2022-07-29 | 2023-07-25 | 烽火通信科技股份有限公司 | Dual-ring switching implementation method and system |
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| CN101594191A (en) * | 2008-05-27 | 2009-12-02 | 华为技术有限公司 | The guard method of shared link interlinking ring network, system and interlink node |
| CN101741671A (en) * | 2009-12-10 | 2010-06-16 | 中兴通讯股份有限公司 | Method and device for realizing dual node interconnection protection in packet transport network |
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| CN1756222A (en) * | 2004-09-27 | 2006-04-05 | 华为技术有限公司 | Looped network and its service realizing method |
| CN101594191A (en) * | 2008-05-27 | 2009-12-02 | 华为技术有限公司 | The guard method of shared link interlinking ring network, system and interlink node |
| CN101741671A (en) * | 2009-12-10 | 2010-06-16 | 中兴通讯股份有限公司 | Method and device for realizing dual node interconnection protection in packet transport network |
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