CN1761228A - Method for implementing transmission and protection for service in MPLS ring net - Google Patents
Method for implementing transmission and protection for service in MPLS ring net Download PDFInfo
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- CN1761228A CN1761228A CNA2004100836645A CN200410083664A CN1761228A CN 1761228 A CN1761228 A CN 1761228A CN A2004100836645 A CNA2004100836645 A CN A2004100836645A CN 200410083664 A CN200410083664 A CN 200410083664A CN 1761228 A CN1761228 A CN 1761228A
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Abstract
The method includes procedures: first, building label switch path for each path (Path LSP) in full network interconnection, and assigning corresponding value of label to each Path LSP; then, based on the said value of label, using the Path LSP transfers traffic between nodes in MPLS ring net. Building corresponding Path LSP between nodes in MPLS ring net makes total number of LSP reduce greatly so as to lower number of LSP saved on node effectively, reduce difficulty to design node and save cost. Information of traffic source and destination can be determined based on label for each node on ring net. The invention provides foundation for implementing protection function, equitable bandwidth mechanism and QoS mechanism in ring net as well as simplifies procedure for treating the said function and mechanisms.
Description
Technical field
The present invention relates to network communications technology field, relate in particular to a kind of professional method that transmits and protect that in the MPLS looped network, realizes.
Background technology
The original intention of MPLS (multiprotocol label switching) technology is in order to improve the forward efficiency of IP network.After IP network employing hardware (ASIC, NP) was transmitted processing, the advantage of MPLS technology was just so unobvious, therefore, and the stagnation of MPLS technical development for some time.But along with the extensive use of the variation of service application, particularly VPN (VLAN), the MPLS technology has been replied vigor again.MPLS-TE (MPLS traffic engineering), MPLS-VPN (MPLS VLAN), MPLS-DiffServ (MPLS differential service), MPS-DS-TE (supporting the MPLS traffic engineering of differential service) become the core of MPLS technical research.
Traditional SDH/SONET (optical transfer network) network adopts circuit-switched technology, and the bandwidth of Business Stream is fixed, and can not satisfy the sudden demand of data service.And MPLS exchanges based on label, can support the transmission of data service simultaneously, and therefore, MPLS becomes a kind of transport layer technology gradually.The same with the channel layer in the SDH/SONET system, multiplex section layer, the MPLS transport layer also has networking, protection, QoS (service quality), the OAM characteristics such as (Operation and Maintenance and management) of self.
According to the current network transmission requirements, the MPLS looped network a kind of new loop network structure appearred, i.e., as shown in Figure 1, in Fig. 1, the connection between the adjacent node is called Span, described Span is two-way connection, can be the link of physics, also can be connection in logic; Looped network is divided into interior ring (counterclockwise) and outer shroud (clockwise) according to service route.
Usually have thousands of Business Stream between the MPLS looped network node, these Business Streams need transmit on looped network.At present,, between node, set up the LSP link, be called Traffic LSP (service label switching path), as shown in Figure 2, arrive node R 2 with node R 5, and node R 1 is that example is described to the Business Stream between the node R 3 for each Business Stream.
From the node R 1 to R3 n bar business is arranged, by m bar business is arranged the node R 5 to R2.For guaranteeing normally carrying out of professional transmission, described business information need be changed into the Label Forwarding Information Base of LSP, and on node R 1, preserve.Like this, when Business Stream more, as nearly 100,000 the time, to the requirement of the memory space on the node R 1 just than higher, and, also need node R 1 to support label lookup, transfer capability fast.
Simultaneously, losing efficacy for preventing adjacent node Span, and also needed for corresponding protection mechanism, as shown in Figure 3, is that example describes to be protected by LSP1 and LSP2 the node R 1 to R3.LSP1, LSP2 all need through the Span between R2 and the R3, and the Span between R2 and R3 lost efficacy, need node R 2 with the switching services that lost efficacy to the protection passage of setting up in advance.At this moment; requiring R2 is the path that every LSP sets up backup; after finding that Span lost efficacy; R2 need be switched to every LSP on the protection LSP; under a lot of situation of LSP list item; if node R 2 disposal abilities are limited, will cause partial L SP to be protected and then to cause message to lose in a large number.
At present; the another kind of protected mode that adopts as shown in Figure 4; LSP1, LSP2 all need through the Span between R2 and the R3 among the figure; Span between R2 and R3 lost efficacy, and then adopted at source node R1 switching services being arrived on the protection passage of R3 through R5, R4 by node R 1 to foundation in advance of losing efficacy.At this moment, requiring at source node is the path that every LSP sets up backup, after finding that Span lost efficacy; source node also needs every LSP is switched on the protection LSP; if the LSP number is a lot, and the source node disposal ability is limited, will cause message to be lost in a large number equally.
In addition, the MPLS looped network also needs the bandwidth fairness mechanism is provided usually, and normally realizes the bandwidth fairness mechanism based on node, controls the visit of each node to looped network, promptly controls the bandwidth that each node can be surfed the Net.At this moment, need add up the message flow that other nodes send at each node.Because internodal every business all can be set up a LSP separately, therefore, must know that on node which LSP is that same node sends, visible process is very loaded down with trivial details.
Have following shortcoming from above-mentioned as can be seen at the professional description that transmits implementation the present MPLS looped network:
(1) set up the lsp tunnel of a special use for each business, will cause the LSP number more, particularly will there be 100,000 LSP in core network; The quantity of LSP occupies big, requires node that more memory space, stronger disposal ability are provided, and cost increases;
(2) when LSP needs protection, the quantity of LSP is doubled and redoubled especially, and processing procedure will take a large amount of processing resources;
When (3) realizing the bandwidth fairness mechanism between node, need each node to know the source of every LSP, place information, processing procedure is comparatively loaded down with trivial details.
Summary of the invention
In view of above-mentioned existing in prior technology problem; the purpose of this invention is to provide a kind of professional method that transmits that in the MPLS looped network, realizes; thereby make that the LSP number on the looped network node is comparatively reasonable, and processing procedure is easy when realizing LSP protection and bandwidth fairness mechanism.
The objective of the invention is to be achieved through the following technical solutions:
The invention provides a kind of professional method that transmits that in the MPLS looped network, realizes, comprising:
Set up the channel labels switching path between A, two nodes in multiprotocol label switching MPLS looped network;
B, distribute corresponding label value for described channel labels switching path;
C, utilize described channel labels switching path in the MPLS looped network, to transmit two internodal business based on described label value.
Described steps A comprises:
In the MPLS looped network, set up each node and other all channels among nodes label switched paths, and described channel labels switching path can be one or more.
Described step B comprises:
Be each channel labels switching path distributing labels in identical Label space of creating in the MPLS looped network, each node has the label range of oneself, can manual configuration, and also can use dynamic protocol to distribute.
Described step B also comprises:
Each channel labels switching path and label information thereof are stored on each node.
Described step B also comprises:
Each channel labels switching path and label information thereof are stored on each node of MPLS looped network with the form of showing, and the content that comprises in the described table comprises: the source node of each channel labels switching path and destination node, and corresponding label value.
Described step C comprises:
When the node of C1, MPLS looped network receives business or control information message, obtain the label value in business or the control information message;
C2, according to described label value, preserve the destination node information that each channel labels switching path and label information thereof are determined business or control information message, and be not that this node is that described business or control information message are sent to downstream node in destination node.
Described step C2 also comprises:
If the business of determining or the destination node of control information message are this node, then receive described business or control information message and transfer to the upper strata and handle.
Described step C also comprises:
After the node of MPLS looped network is received the business or control information message of ring, according to the destination node information of described message and go into channel labels switching path and the label value thereof that the link dot information determines to transmit this service message;
Described label value is carried in business or the control information message based on the channel labels switching path of determining sends described business or control information message.
Among the present invention, the content of the experiment territory EXP field carrying in the described label of step B comprises:
The precedence information of described service message, and/or whether this service message participates in the information that the bandwidth fairness mechanism is handled.
The described method of professional transmission that realizes in the MPLS looped network also comprises:
Determine the precedence information of service message by the label value in the label, and/or whether this service message should participate in the bandwidth fairness mechanism.
The present invention also provides the method that realizes service protection in a kind of MPLS looped network, comprising:
Set up the channel labels switching path between in the MPLS looped network, appointing between two adjacent nodes as the protection path;
In the time can't carrying out the business transmission between two adjacent nodes, then will to channel labels switching path, transmit through the switching services between two adjacent nodes as the protection path.
The present invention also provides the method that realizes service protection in the another kind of MPLS looped network, comprising:
Set up the two passes label switched path between D, any two nodes in the MPLS looped network;
E, can't carry out business when transmitting when a channel labels switching path, then transmit on two nodes corresponding business being switched on another channel labels switching path.
Described step D also comprises:
The two passes label switched path is set to primary, spare channel labels switching path respectively; wherein; the master channel label switching path LSP is used to carry out the transmission of two internodal business, and the alternate channel label switched path is used to protect the master channel label switched path.
Described step D also comprises:
Utilize the two passes label switched path to share the described two internodal business of transmission, and the two passes label switched path provide protection for the other side mutually.
As seen from the above technical solution provided by the invention, the present invention is owing to set up the Path LSP of Full-Mesh between the node of MPLS looped network, and the quantity of corresponding LSP only is n (n-1)/2; Usually, if the node number on the looped network in 16, then the total quantity of LSP will be less than 120, effectively reduce the LSP number of preserving in the node, thereby reduce the design difficulty of node, provide cost savings.
And; among the present invention; the shared Label space of all nodes on the MPLS looped network; like this; on each node, can both judge professional source, place information based on label value, thereby for realizing that in looped network defencive function and bandwidth fairness mechanism provide the basis; greatly simplified the processing procedure that realizes defencive function and bandwidth fairness mechanism, and then the processing resource of having saved node.
Description of drawings
Fig. 1 is the structural representation of MPLS looped network;
Fig. 2 is the professional load mode schematic diagram of MPLS looped network in the prior art;
Fig. 3 and Fig. 4 are the schematic diagram that the MPLS looped network is realized service protection in the prior art;
Fig. 5 is the professional load mode schematic diagram of MPLS looped network among the present invention;
Fig. 6 sets up the interconnected schematic diagram of the whole network for MPLS looped network among the present invention;
Fig. 7 is a method flow diagram of the present invention;
Fig. 8, Fig. 9 and Figure 10 realize the schematic diagram of service protection for MPLS looped network among the present invention.
Embodiment
Core of the present invention is the annular networking at MPLS, and the business that solves on the MPLS looped network transmits problem, specifically comprises foundation, the protection of LSP between node, and problem such as QoS.
The specific implementation of the method that the realization business transmits in the MPLS looped network of the present invention such as Fig. 5, Figure 6 and Figure 7 specifically may further comprise the steps:
Step 71: set up the interconnected channel labels switching path of the whole network on each node of MPLS looped network, described channel labels switching path is called Path LSP;
Specifically can be when initial, set up the Path LSP of Full-Mesh (the whole network is interconnected) for each node on the MPLS looped network, logical view is as shown in Figure 6;
Just between any two nodes of MPLS looped network, set up internodal all business of Path LSP carrying, and no longer need as in the prior art, adopt different LSP to carry transmission respectively internodal each business, described Path LSP can be one, also can be many;
Described Path LSP is used to carry two internodal all business to be transmitted or the control informations that transmit correspondence, for example, Path LSP1 is the Path LSP of 2 of node 1 and nodes in the MPLS looped network, then in the MPLS looped network, when needs are source node with node 1, with node 2 is destination node when carrying out business or control information and transmitting, and business then that all are to be transmitted or control information are carried on all that carrying transmits among the described PathLSP1; That is to say that two internodal original each business or control informations by Traffic LSP carrying are all carried by Path LSP, promptly a Path LSP can carry business or the control information that many Traffic LSP transmit.
Step 72: each Path LSP that is respectively establishment distributes corresponding label, i.e. the identification information of each Path LSP;
On the MPLS looped network, the sign of each Path LSP is unique;
Among the present invention, when carrying out the label distribution of Path LSP, to share same Label space for all nodes in the same MPLS looped network, promptly in same Label space, carry out the distribution of label, simultaneously, each node can the distributed labels scope also be fixed, and like this, the arbitrary node in the MPLS looped network all can be based on source, the place information of label value perception service;
Described same Label space is meant that label is unique in the MPLS looped network, and same label value can not be used for the interface of a plurality of node/nodes.
Step 73: in each node of MPLS looped network, preserve each Path LSP that creates and be its distributed labels value;
Among the present invention, can in node, preserve described Path LSP and corresponding label information thereof with the form of table, the content of preserving in the described table comprises: the source node of each Path LSP and destination node information, corresponding label values etc. can also comprise the information such as sequence number of each Path LSP;
In the MPLS looped network node, create and preserved each Path LSP, and behind the corresponding label value, just can execution in step 74 carry out professional transmission based on each Path LSP.
Step 74: when the MPLS looped network node receives the service message of ring, determine the destination node information of described service message according to the destination information of message going into the link point;
Specifically the mac address information of each node that can preserve according to purpose MAC (medium access control) the address information query node that receives service message is determined the mac address information of described service message, certainly, also can determine the destination node information of described service message according to other information;
Step 75: the circling point of going at service message is a unique Path LSP and label information thereof between corresponding two nodes of information acquisition in the described table preserved of search index with described destination node information;
Step 76: the label information of the described Path LSP that will obtain is carried in the described service message and transmits in the MPLS looped network, in the MPLS looped network, just can carry out the transmission processing of service message like this, thereby message is sent to destination node by a unique Path LSP who creates between node according to described label information;
Step 77: after node in the looped network is received described service message, obtain the label value in the message, and be the described table of search index, obtain the destination node information of the Path LSP of this label value correspondence with described label value;
Step 78: judge whether described destination node information is this node, if then execution in step 79, otherwise, execution in step 710;
Certainly, also can directly determine according to described label value whether this node is the destination node of described service message, if, execution in step 79, otherwise, execution in step 710;
Step 79: determine that this node is the destination node of described service message, this node receives described service message and transfers to the reception processing that message is carried out on the upper strata, for example, carries out the following ring processing of described service message etc.
Step 710: determine that described service message does not also arrive destination node, need to continue to send to downstream node described service message, after downstream node receives described service message, then continue to carry out described step 78, arrive destination node until described service message.
Among the present invention, the hundreds of business that between two nodes of MPLS looped network, may exist, it is sightless that but all these business are for intermediate node in transmission course, as shown in Figure 5, promptly only carry out the forwarding processing of service message based on corresponding label value at intermediate node, do not change the corresponding label value that carries in the service message, promptly jump onto in each of the Path of professional transport process process LSP, label value all remains unchanged.
As shown in Figure 5, between node R 1 and node R 3, there is n bar business, business 1, the professional n of professional 2......, all business all are encapsulated among the Path LSP that creates between node R 1 and the node R 3, node R 2 only keeps the information of this Path LSP, be used for doing label forwarding and handle, transmit each business that receives according to described information.
Among the present invention; because any two internodal business in the MPLS looped network are only transmitted by a unique Path LSP who creates; so; between two adjacent nodes, break down in the time of to carry out the business transmission; then only needing provides corresponding protection to get final product the Path LSP of adjacent two internodal all processes; needing in the MPLS looped network as can be seen provides the LSP number of protection to significantly reduce, and has reduced the complexity that Node Protection is handled effectively, the processing resource of having saved node.
Among the present invention, can also use the grade of service of Exp (experiment territory) the field identification business in the label and whether participate in the information that the bandwidth fairness mechanism is handled.
If the grade of service of Business Stream is mapped to Exp field in the label,, therefore can provides 8 different grades of service indications in principle then because the Exp field has 3bit (bit); But, consider the complexity in network application and the design, mostly just provide 4 grades of service or 3 grades of service promptly can satisfy corresponding demand.
Whether the Exp field can be used for simultaneously identification service and whether participate in the bandwidth fairness mechanism and handle, for example can adopt a Bit in the Exp field to identify and participate in, and perhaps for Exp is provided with a thresholding, determines whether participate in according to described threshold value.
The present invention can use the grade of service of the label codomain field identification business in the label and/or whether participate in the information of bandwidth fair dealing mechanism.
The present invention also provides in a kind of MPLS looped network the method that realizes service protection, this method specific implementation as shown in Figure 8, comprising:
In the MPLS looped network, set up the protection path between two adjacent nodes between appointing; described protection path is similarly Path LSP; and between two adjacent nodes, break down and can't carry out transfer of data the time; to to Path LSP, transmit through the switching services between two adjacent nodes as the protection path; thereby the business of transmitting in the assurance MPLS looped network is not interrupted; and; because the minimizing of LSP number; the operation process that feasible protection is switched is also very easy, and then can guarantee the reliability of switching.
The present invention also provides the method that realizes service protection in a kind of MPLS looped network, and the specific implementation of this method such as Fig. 9 and shown in Figure 10 comprise:
At first, set up two Path LSP between any two nodes in the MPLS looped network, just for setting up two Path LSP respectively between any two nodes that need to realize service protection in the MPLS looped network;
Afterwards; when a Path LSP owing to reason such as break down can't be carried out business when transmitting; just can transmit on two nodes corresponding business being switched on another Path LSP; thereby guarantee professional not interrupting of transmitting between two nodes, realized at defencive function professional between two nodes.
In the specific implementation process, we can be set to primary, spare PathLSP respectively with two Path LSP, and wherein, the master is used to carry out the transmission of two internodal all business with Path LSP, and standby PathLSP is used to protect the main Path LSP that uses; When the master can't be transmitted with Path LSP, as shown in Figure 9, need all be switched on the standby Path LSP in all business that transmit between two nodes and transmit.
In addition; can also be as shown in figure 10 in application process; utilize two Path LSP to share respectively and transmit described two all business internodal to be transmitted; and two Path LSP provides protection for the other side mutually; promptly in the time can't carrying out the business transmission for arbitrary among two Path LSP; then the business of its transmission all is switched on another Path LSP and transmits; at this moment, in the MPLS looped network only by normal Path LSP wherein be responsible for two internodal all wait to transmit professional transmission work.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (14)
1, a kind of method that realizes professional transmission in the MPLS looped network is characterized in that, comprising:
Set up the channel labels switching path between A, two nodes in multiprotocol label switching MPLS looped network;
B, distribute corresponding label value for described channel labels switching path;
C, utilize described channel labels switching path in the MPLS looped network, to transmit two internodal business based on described label value.
2, the method that realizes professional transmission in the MPLS looped network according to claim 1 is characterized in that described steps A comprises:
In the MPLS looped network, set up each node and other all channels among nodes label switched paths, and described channel labels switching path can be one or more.
3, the method that realizes professional transmission in the MPLS looped network according to claim 1 is characterized in that described step B comprises:
Be each channel labels switching path distributing labels in identical Label space of creating in the MPLS looped network, each node has the label range of oneself, can manual configuration, and also can use dynamic protocol to distribute.
4, according to claim 2 or the 3 described methods that in the MPLS looped network, realize professional transmission, it is characterized in that described step B also comprises:
Each channel labels switching path and label information thereof are stored on each node.
5, the method that realizes professional transmission in the MPLS looped network according to claim 4 is characterized in that described step B also comprises:
Each channel labels switching path and label information thereof are stored on each node of MPLS looped network with the form of showing, and the content that comprises in the described table comprises: the source node of each channel labels switching path and destination node, and corresponding label value.
6, according to claim 1, the 2 or 3 described methods that in the MPLS looped network, realize professional transmission, it is characterized in that described step C comprises:
When the node of C1, MPLS looped network receives business or control information message, obtain the label value in business or the control information message;
C2, according to described label value, preserve the destination node information that each channel labels switching path and label information thereof are determined business or control information message, and be not that this node is that described business or control information message are sent to downstream node in destination node.
7, the method that realizes professional transmission in the MPLS looped network according to claim 6 is characterized in that described step C2 also comprises:
If the business of determining or the destination node of control information message are this node, then receive described business or control information message and transfer to the upper strata and handle.
8, the method that realizes professional transmission in the MPLS looped network according to claim 6 is characterized in that described step C also comprises:
After the node of MPLS looped network is received the business or control information message of ring, according to the destination node information of described message and go into channel labels switching path and the label value thereof that the link dot information determines to transmit this service message;
Described label value is carried in business or the control information message based on the channel labels switching path of determining sends described business or control information message.
9, the method that realizes professional transmission in the MPLS looped network according to claim 1 is characterized in that, the content of the experiment territory EXP field carrying in the described label of step B comprises:
The precedence information of described service message, and/or whether this service message participates in the information that the bandwidth fairness mechanism is handled.
10, the method that realizes professional transmission in the MPLS looped network according to claim 1 is characterized in that this method also comprises:
Determine the precedence information of service message by the label value in the label, and/or whether this service message should participate in the bandwidth fairness mechanism.
11, realize the method for service protection in a kind of MPLS looped network, it is characterized in that, comprising:
Set up the channel labels switching path between in the MPLS looped network, appointing between two adjacent nodes as the protection path;
In the time can't carrying out the business transmission between two adjacent nodes, then will to channel labels switching path, transmit through the switching services between two adjacent nodes as the protection path.
12, realize the method for service protection in a kind of MPLS looped network, it is characterized in that, comprising:
Set up the two passes label switched path between D, any two nodes in the MPLS looped network;
E, can't carry out business when transmitting when a channel labels switching path, then transmit on two nodes corresponding business being switched on another channel labels switching path.
13, realize the method for service protection in the MPLS looped network according to claim 12, it is characterized in that described step D also comprises:
The two passes label switched path is set to primary, spare channel labels switching path respectively; wherein; the master channel label switching path LSP is used to carry out the transmission of two internodal business, and the alternate channel label switched path is used to protect the master channel label switched path.
14, realize the method for service protection in the MPLS looped network according to claim 12, it is characterized in that described step D also comprises:
Utilize the two passes label switched path to share the described two internodal business of transmission, and the two passes label switched path provide protection for the other side mutually.
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| WO2008077340A1 (en) * | 2006-12-27 | 2008-07-03 | Huawei Technologies Co., Ltd. | A method and device for avoiding label collision when pbt is controlled by gmpls |
| WO2011038627A1 (en) * | 2009-09-29 | 2011-04-07 | 华为技术有限公司 | Method, device and system for protecting multi-protocol label switching ring network |
| US8144601B2 (en) | 2007-05-30 | 2012-03-27 | Huawei Technologies Co., Ltd. | Fault detection method, communication system and label switching router |
| CN102404176A (en) * | 2010-09-19 | 2012-04-04 | 中兴通讯股份有限公司 | Method and device for transmitting service flows in looped network |
| WO2012167516A1 (en) * | 2011-09-06 | 2012-12-13 | 华为技术有限公司 | Method, apparatus and system for generating label forwarding table in ring topology |
| US8787313B2 (en) | 2007-02-02 | 2014-07-22 | Huawei Technologies Co., Ltd. | Method, network system and destination network for transmitting QoS during a handover process between systems |
| CN104539529A (en) * | 2015-01-07 | 2015-04-22 | 烽火通信科技股份有限公司 | Configuration method for MSRP intersecting ring protection of telecommunication MPLS-TP transmission network |
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| EP1130853A1 (en) * | 2000-02-29 | 2001-09-05 | Siemens Aktiengesellschaft | Circuit arrangement for changeover to standby of transmission installations in ring architectures with MPLS-packets |
| US6725401B1 (en) * | 2000-10-26 | 2004-04-20 | Nortel Networks Limited | Optimized fault notification in an overlay mesh network via network knowledge correlation |
| US7088679B2 (en) * | 2001-12-12 | 2006-08-08 | Lucent Technologies Inc. | Method and system for providing failure protection in a ring network that utilizes label switching |
| US7483399B2 (en) * | 2002-06-05 | 2009-01-27 | David Zelig | Signaling MPLS over RPR rings |
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| WO2008077340A1 (en) * | 2006-12-27 | 2008-07-03 | Huawei Technologies Co., Ltd. | A method and device for avoiding label collision when pbt is controlled by gmpls |
| US8787313B2 (en) | 2007-02-02 | 2014-07-22 | Huawei Technologies Co., Ltd. | Method, network system and destination network for transmitting QoS during a handover process between systems |
| US8144601B2 (en) | 2007-05-30 | 2012-03-27 | Huawei Technologies Co., Ltd. | Fault detection method, communication system and label switching router |
| CN101316225B (en) * | 2007-05-30 | 2012-12-12 | 华为技术有限公司 | Fault detection method, communication system and label exchange router |
| CN102035712B (en) * | 2009-09-29 | 2013-12-18 | 华为技术有限公司 | Multiprotocol label exchanged ring network protection method, device and system |
| WO2011038627A1 (en) * | 2009-09-29 | 2011-04-07 | 华为技术有限公司 | Method, device and system for protecting multi-protocol label switching ring network |
| CN102404176A (en) * | 2010-09-19 | 2012-04-04 | 中兴通讯股份有限公司 | Method and device for transmitting service flows in looped network |
| CN102404176B (en) * | 2010-09-19 | 2016-03-30 | 中兴通讯股份有限公司 | A kind of method of transmitting service flows in looped network and device |
| WO2012167516A1 (en) * | 2011-09-06 | 2012-12-13 | 华为技术有限公司 | Method, apparatus and system for generating label forwarding table in ring topology |
| US9178811B2 (en) | 2011-09-06 | 2015-11-03 | Huawei Technologies Co., Ltd. | Method, apparatus and system for generating label forwarding table on ring topology |
| CN104539529A (en) * | 2015-01-07 | 2015-04-22 | 烽火通信科技股份有限公司 | Configuration method for MSRP intersecting ring protection of telecommunication MPLS-TP transmission network |
| CN104539529B (en) * | 2015-01-07 | 2017-12-01 | 烽火通信科技股份有限公司 | A kind of telecommunications MPLS TP transmission networks MSRP intersects the collocation method of ring protection |
| WO2017000562A1 (en) * | 2015-07-01 | 2017-01-05 | 中兴通讯股份有限公司 | Fast re-route method and device for ring network |
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| CN100359880C (en) | 2008-01-02 |
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