WO2015120720A1

WO2015120720A1 - Signal degradation failure processing method and system

Info

Publication number: WO2015120720A1
Application number: PCT/CN2014/086546
Authority: WO
Inventors: 刘国满; 张宝亚
Original assignee: 中兴通讯股份有限公司
Priority date: 2014-02-14
Filing date: 2014-09-15
Publication date: 2015-08-20
Also published as: CN104852809A; CN104852809B

Abstract

Disclosed are a signal degradation failure processing method and system. The method comprises: determining, by a first node, that an SD failure exists in a link between the first node and a second node; generating, by the first node, one or a plurality of first SD failure alarm information packets according to the state information about the SD failure occurring on the link; and sending, by the first node, each first SD failure alarm information packet to a corresponding end node respectively, wherein each first SD failure alarm information packet is used for determining the SD failure occurring on the link by the corresponding end node according to identification information about one or a plurality of LSPs carried in the first SD failure alarm information packets and/or triggering one or a plurality of LSPs where the end node is located to execute an operation of switching between a main path and a standby path. According to the technical solution provided in the present invention, the overhead of AIS alarm transmission and processing can be saved, and additional LSPs can be prevented from being re-established on the link.

Description

Signal degradation fault processing method and system

Technical field

The present invention relates to the field of communications, and in particular to a method and system for processing signal degradation faults.

Background technique

At present, the alarm function of the Alarm Indication Signal (AIS) is mainly applied to the transmission of a Packet Transport Network (PTN) and an Optical Transport Network (OTN). On a network device. When the link layer faults are detected by the nodes at both ends of the link layer (which may include: Signal Degradation (SD), Signal Failure (SF)), then two of the faulty link layers are The end node inserts AIS alarm information on the client layer label switching channel (LSP Switch Path, LSP for short) or multiplex section channel, and advertises it to the client layer LSP or both ends of the multiplex section channel to suppress the client. The two ends of the LSP report the Lost Of Connection (LOC) or Loss Of Signal (LOS) alarm to the NMS. In addition, the SD performance detection mode on the end-to-end path can be used to detect whether there is an SD fault in the path. However, the drawback of this technical solution is that loss measurement (Loss Measurement, LM for short) is required on each LSP. Or performance detection and operation such as Delay Measurement (DM), the implementation process is more complicated. In addition, in the existing multi-protocol label switching transmission application (MPLS-TP) AIS alarm scheme, AIS alarm packets are required to be inserted into each client layer LSP on the link layer, and a large number of AIS alarms are generated. The message, which increases the AIS processing overhead and bandwidth resource transmission overhead of the device.

For the IP/MPLS network equipment of the current radio access network IP (IP RAN), the detection of the link fault is mainly to detect the SF fault through the end-to-end bidirectional forwarding detection (BFD) mechanism, or At the IP layer, IP performance measurement (Performance Measurement, PM for short) is used to detect SD performance. For IP/MPLS LSPs or tunnels, there is also a lack of end-to-end SD fault detection and notification mechanisms.

Summary of the invention

The present invention provides a method and system for processing signal degradation faults to at least solve the problem of lack of SD fault detection and notification mode on the IP/MPLS network end-to-end LSP in the related art.

According to an aspect of the invention, a method of processing a signal degradation fault is provided.

A method for processing a signal degradation fault according to an embodiment of the present invention includes: the first node determines a link presence signal degradation (SD) fault between the first node and the second node, wherein the first node and the second node are And generating, by the first node, one or more first SD fault alarm information messages, according to the status information of the SD fault occurring on the link, where Each first SD fault alarm information message carries identification information of one or more LSPs where the end node corresponding to the first SD fault alarm information packet is located; the first node will each first SD fault alarm The information message is sent to the corresponding end node, where each first SD fault alarm information message is used by the corresponding end node according to the identification information of one or more LSPs carried in the first SD fault alarm information message. Determine that an SD fault occurs on the link, and/or trigger one or more LSPs where the end node is located to perform the switching operation of the active and standby paths.

Preferably, the first node determines that the link has an SD fault, including one of the following: the first node detects that there is an SD fault on the link; the first node receives the second node by adding an SD on the link by adding in a preset protocol. Announcement that occurs after the status information of the fault.

Preferably, the first node generates one or more first SD fault alarm information messages, including: after detecting the SD fault, the first node will have the same manner through an Internet Protocol (IP) and a User Datagram Protocol (UDP) encapsulation manner. The identifier of one or more LSPs of the destination end node is encapsulated into an IP packet or a UDP packet to generate one or more first SD fault alarm information packets. The first node uses an IP packet or a UDP packet. The UDP port number identifies one or more types of the first SD fault alarm information packet as the type of the SD alarm information.

Preferably, after the first node sends each first SD fault alarm information message to the corresponding end node, the method further includes: the corresponding end node determines, by using the UDP port number, that the received packet type is the first SD fault. The alarm information packet is sent by the corresponding end node to trigger one or more LSPs in which the end node is located to perform the switching operation of the active/standby path according to the identifier information of one or more LSPs carried in the first SD fault alarm information packet. .

Preferably, after the first node sends each first SD fault alarm information message to the corresponding end node, the method further includes: the corresponding end node receives the second SD fault corresponding to the end node from the second node. The alarm information packet is determined by the corresponding end node according to the first SD fault alarm information message fed back by the first node and the second SD fault alarm information message fed back by the second node.

According to another aspect of the present invention, a processing system for signal degradation failure is provided.

A processing system for signal degradation failure according to an embodiment of the present invention includes: a first node; the first node includes: a first determining module, configured to determine that an SD fault exists in a link between the first node and the second node, where The first node and the second node are adjacent two-node nodes of the common link through which the plurality of LSPs pass; and the generating module is configured to generate one or more first SD fault alarms according to the status information of the SD fault occurring on the link. Information message The first SD fault alarm information packet carries identifier information of one or more LSPs where the end node corresponding to the first SD fault alarm information packet is located, and the sending module is set to be each An SD fault alarm information message is sent to the corresponding end node, where each first SD fault alarm information message is used by the corresponding end node according to one or more pieces carried in the first SD fault alarm information message. The LSP identification information determines that an SD fault occurs on the link, and/or triggers one or more LSPs in which the end node is located to perform the switching operation of the active/standby path.

Preferably, the first determining module includes: a detecting unit configured to detect that there is an SD fault on the link; and a receiving unit configured to receive the second node by adding state information of the SD fault on the link after adding the preset protocol Notice of occurrence.

Preferably, the generating module includes: an encapsulating unit, configured to uniformly encapsulate the identification information of one or more LSPs having the same destination end node into an IP packet or a UDP packet by using an IP and UDP encapsulation manner after detecting the SD fault. And generating one or more first SD fault alarm information messages; the identifier unit is configured to use the UDP port number in the IP packet or the UDP packet to identify one or more types of the first SD fault alarm information message as SD Type of alarm information.

Preferably, the system further includes: a plurality of end nodes; each of the end nodes includes: a second determining module, configured to determine, by using the UDP port number, that the received packet type is the first SD fault alarm information message; And setting, according to the identifier information of one or more LSPs carried in the first SD fault alarm information packet, triggering one or more LSPs in which the end node is located to perform the switching operation of the active/standby path.

Preferably, each end node further includes: a receiving module, configured to receive a second SD fault alarm information message corresponding to the end node from the second node; and a third determining module, configured to receive feedback according to the first node The first SD fault alarm information message and the second SD fault alarm information message fed back by the second node determine that an SD fault occurs on the link.

In the embodiment of the present invention, when one end node determines that there is an SD fault in the link between the peer node and the peer node in the adjacent two ends of the common link through which the plurality of LSPs pass, one end node may be in the chain. The status information of the SD fault on the road generates one or more SD fault alarm information messages, and each SD fault alarm information message carries the first SD fault alarm information in each end node of the multiple LSPs. The identifier information of one or more LSPs where the end node corresponding to the packet is sent; then, one end node sends each SD fault alarm information packet to the corresponding end node, and then the corresponding end node can be notified according to the SD fault. The identification information of one or more LSPs carried in the information packet determines that an SD fault occurs on the link, and/or triggers the LSP of the end node to perform the switching operation of the active/standby path, thereby solving the related art. The problem of SD fault detection and notification mode on the end-to-end LSP of the IP/MPLS network can be solved on the IP/MPLS network. The SD alarm notification function is implemented, and the AIS alarm transmission and processing overhead can be saved relative to the AIS alarm function of the MPLS-TP, thereby avoiding re-establishing additional LSPs on the link.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a flow chart of a method of processing a signal degradation fault according to an embodiment of the present invention;

2 is a schematic diagram of an AIS message format according to a preferred embodiment of the present invention;

3 is a schematic diagram of a Tunnel Information TLV message structure according to a preferred embodiment of the present invention;

4 is a schematic diagram showing the structure of an END TLV message according to a preferred embodiment of the present invention;

5 is a flow diagram of SD fault notification and location in accordance with a preferred embodiment of the present invention;

6 is a schematic diagram of an IP RAN transmission path in accordance with a preferred embodiment of the present invention;

7 is a schematic diagram of an IP RAN failure notification in accordance with a preferred embodiment of the present invention;

8 is a structural block diagram of a processing system for signal degradation failure according to an embodiment of the present invention;

9 is a block diagram showing the structure of a processing system for signal degradation failures in accordance with a preferred embodiment of the present invention;

10 is a block diagram showing the structure of an SD fault notification and positioning system in accordance with a preferred embodiment of the present invention.

detailed description

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

1 is a flow chart of a method of processing a signal degradation fault in accordance with an embodiment of the present invention. As shown in FIG. 1, the method may include the following processing steps:

Step S102: The first node determines that there is an SD fault in the link between the first node and the second node, where the first node and the second node are adjacent two-node nodes of a common link through which multiple LSPs pass;

Step S104: The first node generates one or more first SD fault alarm information messages according to the status information of the SD fault occurring on the link, where each first SD fault alarm information message carries the same Identification information of one or more LSPs where the end node corresponding to the SD fault alarm information packet is located;

Step S106: The first node sends each first SD fault alarm information message to the corresponding end node, where each first SD fault alarm information message is used by the corresponding end node to determine that SD occurs on the link. The fault, and/or triggering one or more LSPs where the end node is located to perform the switching operation of the active/standby path.

In the related art, there is a lack of SD fault detection and notification mode on the end-to-end LSP of the IP/MPLS network. In the method shown in FIG. 1 , when one end node determines that there is an SD fault on the link between the peer node and the peer node in the neighboring nodes of the common link through which the plurality of LSPs pass, one end node may Generating one or more SD fault alarm information messages according to the status information of the SD fault occurring on the link, and each SD fault alarm information packet carries each of the plurality of LSPs and the first SD The identification information of one or more LSPs where the end node corresponding to the fault alarm information packet is located; then, one end node sends each SD fault alarm information packet to the corresponding end node, and then the corresponding end node can be based on The identification information of one or more LSPs carried in the SD fault alarm information packet determines that an SD fault occurs on the link, and/or triggers the LSP where the end node is located to perform the switching operation of the active/standby path, thereby solving the related In the technology, there is a lack of SD fault detection and notification mode on the IP/MPLS network end-to-end LSP, and thus the SD alarm notification function can be implemented on the IP/MPLS network, and the AIS advertisement relative to the MPLS-TP In terms of the alarm function, AIS alarm transmission and processing overhead can be saved, and additional LSPs can be re-established on the link.

Preferably, in step S102, the first node determines that the link has an SD fault, which may include but is not limited to one of the following manners:

Method 1: The first node detects (for example, detecting by an Operation Management and Maintenance (OAM) mechanism) that there is an SD fault on the link;

Manner 2: The first node receives the second node by adding an announcement that occurs after the status information of the SD fault exists on the link in a preset protocol (for example, Extended Link Layer Discovery Protocol (LLDP)).

In a preferred embodiment, the link node detects whether the link is through a link layer OAM mechanism (eg, Cyclic Redundancy Check (CRC), Connection Failure Management (CFM), Test Mode Selection (TMS), etc.) There is an SD failure. If an SD fault is detected, the LSP path or tunnel ID information of the same destination node in the link is uniformly encapsulated into IP/UDP packets through IP and UDP encapsulation, and a specific UDP destination port is used. Identifies the SD fault alarm packet. For example, encapsulation is performed by AIS message. FIG. 2 is a schematic diagram of an AIS message format according to a preferred embodiment of the present invention. As shown in Figure 2, the Tunnel Tag Length Value (TLV) Header is an optional field. 3 is a tunnel information (Tunnel) in accordance with a preferred embodiment of the present invention Information) Schematic diagram of the TLV message structure. 4 is a schematic diagram of an END TLV message structure in accordance with a preferred embodiment of the present invention. As shown in Figure 3 and Figure 4, the END TLV is mainly used to indicate the end of the Tunnel TLV. When only the single-ended node detects the fault, the end node needs to announce the SD state information of the port in the LLDP protocol to the opposite node, so that the peer node knows the SD fault status information on the corresponding link.

Preferably, in step S104, the first node generating one or more first SD fault alarm information messages may include the following operations:

Step S1: After detecting the SD fault, the first node uniformly encapsulates the identifier information of one or more LSPs with the same destination end node into the IP packet through the Internet Protocol (IP) and the User Data Protocol (UDP) encapsulation manner. Or UDP packet, generating one or more first SD fault alarm information messages;

Step S2: The first node uses the UDP port number in the IP packet or the UDP packet to identify one or more types of the first SD fault alarm information packet as the SD alarm information type.

Preferably, after the first node sends each first SD fault alarm information message to the corresponding end node, the first node may further include the following steps:

Step S3: The corresponding end node determines, by using the UDP port number, that the received packet type is the first SD fault alarm information packet;

Step S4: The corresponding end node triggers the switching operation of the active/standby path by one or more LSPs where the end node is located according to the identifier information of one or more LSPs that are carried in the first SD fault alarm information packet.

In a preferred embodiment, the node that actively detects or is notified of the SD fault can send the SD alarm packet to the upper LSP node transmitted on the end link by using the IP and UDP encapsulation mode after generating the SD alarm packet. After receiving the SD fault alarm information encapsulated by the IP and UDP modes, the LSP upper node can determine the SD fault alarm packet by using the UDP port number, and then determine the current LSP ID or the tunnel ID information encapsulated in the packet. The LSP or the tunnel is faulty on the LSP or the tunnel. The LSP or tunnel is triggered to perform the active/standby switchover.

Preferably, after the first node sends each first SD fault alarm information message to the corresponding end node, the first node may further include the following operations:

Step S5: The corresponding end node receives the second SD fault alarm information message corresponding to the end node from the second node;

Step S6: The corresponding end node determines that an SD fault occurs on the link according to the first SD fault alarm information message fed back by the first node and the second SD fault alarm information message fed back by the second node.

In a preferred embodiment, the node that actively detects or is notified of the SD fault can send the SD alarm packet to the upper LSP node transmitted on the end link by using the IP and UDP encapsulation mode after generating the SD alarm packet. After receiving the SD fault alarm information encapsulated by the IP and UDP modes, the LSP upper node can determine the SD fault alarm packet by using the UDP port number, and then determine the current LSP ID or the tunnel ID information encapsulated in the packet. Which LSPs or tunnels on the node have the possibility of SD failure, so that the location of the SD faulty link is determined according to the SD fault alarm information message fed back by the node on the SD fault link.

As a preferred embodiment of the present invention, FIG. 5 is a flow chart of SD fault notification and location in accordance with a preferred embodiment of the present invention. As shown in FIG. 5, the process may include the following processing steps:

Step S502: The link node performs SD fault detection through a link layer OAM mechanism (for example, error detection mechanisms such as CRC, CFM, and TMS);

Step S504: The link node determines whether the link has an SD fault; if yes, proceeds to step S506; if not, returns to step S502 to continue SD fault detection;

Step S506: When only the single-ended node detects the fault, the end node needs to send an advertisement to the opposite node by extending the port SD state information in the LLDP protocol, so that the peer node learns the SD fault state information on the corresponding link.

Step S508: The link node uniformly encapsulates multiple LSP path or tunnel ID information of the same destination node in the link into the IP/UDP packet by using the IP and UDP encapsulation manner;

Step S510: The link node uses a specific UDP destination port to identify the SD fault alarm message; after the node that actively detects or is notified of the SD fault, the link node can generate the SD alarm message by IP and UDP encapsulation. The SD alarm packet is sent to the upper node of the LSP transmitted on the link of the end;

Step S512: After receiving the SD fault alarm information encapsulated by the IP and UDP modes, the LSP upper node can determine the SD fault alarm packet by using the UDP port number, and then judge according to the LSP ID or the tunnel ID information encapsulated in the packet. The LSP or the tunnel is faulty on the LSP or the tunnel. The LSP or the tunnel is triggered to perform the active/standby switchover.

Step S514: The upper node of the LSP determines the location of the SD faulty link according to the SD fault alarm information message fed back by the node on the SD fault link.

The following takes the IP RAN transmission path as an example to further describe the implementation process of the SD alarm notification.

6 is a schematic diagram of an IP RAN transmission path in accordance with a preferred embodiment of the present invention. 7 is a schematic diagram of an IP RAN failure notification in accordance with a preferred embodiment of the present invention. As shown in FIG. 6 and FIG. 7, if there are two LSPs on the IP RAN network, they are LSP1 (A-C-D-E) and LSP2 (B-C-D-E), respectively. After the C or D node detects that the link has signal degradation (SD) through one of the CRC, TMS, and CFM modes of the link layer, the LLDP SD port status may be extended to notify the neighboring node of the peer, for example, :D detects that the port where C-D is faulty, and then advertises the LLDP packet to the peer C node that the SD fault has been detected. Conversely, when C detects that the D-C link is faulty, it also reports to the peer node. D issues a notice.

An AIS alarm message is generated when the faulty neighboring node detects the fault or the neighboring node advertises an SD fault on the link. That is, C will generate the following three types of SD AIS fault packets: First, in SD AIS The fault alarm packet carries the LSP 1 information and is sent to the A node through IP and UDP encapsulation. Second, the SDAIS packet carries the LSP 2 information and is sent to the Node B through IP and UDP encapsulation. Generates an SD AIS packet carrying LSP1 and LSP2 information and sends it to the E node. D also generates the above three AIS packets and encapsulates them in IP and UDP, and then sends them to the A, B, and E end nodes. .

When the LSP1 and LSP2 upper nodes A, B, and E receive the SD AIS alarms sent from the nodes C and D on the two ends of the SD link, the UDP port number can be analyzed based on the UDP port number. The LSP ID information carried in the AIS alarm packet further determines which LSPs or tunnels on the node are likely to have SD and the location of the SD link. For example, the A node receives the AIS alarm packet sent by C and D. On the one hand, it can judge the current SD fault location on the C-D link according to the information fed back by the AIS. On the other hand, it can also be based on the AIS alarm packet. The LSP ID information is used to determine that the current LSP1 may have an SD fault. For B, it can be determined that the LSP2 will have an SD fault. For the E node, it can be determined that both LSP1 and LSP2 may have SD. malfunction.

After receiving the AIS alarm packet sent by the nodes C and D of the intermediate SD link, the LSP upper node A, B, and E trigger the switching operation of the active and standby paths on the LSP1 and LSP2 paths where the SD fault may occur.

FIG. 8 is a block diagram showing the structure of a processing system for signal degradation failure according to an embodiment of the present invention. As shown in FIG. 8, the processing system for the signal degradation fault may include: a first node 10; the first node 10 may include: a first determining module 100 configured to determine a chain between the first node and the second node The path has an SD fault, wherein the first node and the second node are adjacent two-node nodes of the common link through which the plurality of LSPs pass; and the generating module 102 is configured to generate one or according to status information of the SD fault occurring on the link. a plurality of first SD failure alarm information messages, wherein each of the first SD failure alarm information messages respectively carries an identifier of one or more LSPs where the end node corresponding to the first SD failure alarm information message is located Information; sending module 104, set to each of the first SD The fault alarm information message is sent to the corresponding end node, where each first SD fault alarm information message is used by the corresponding end node according to one or more LSPs carried in the first SD fault alarm information message. The identification information determines that an SD fault occurs on the link, and/or triggers one or more LSPs in which the end node is located to perform a switching operation of the active/standby path.

The system shown in FIG. 8 solves the problem of lack of SD fault detection and notification mode on the IP/MPLS network end-to-end LSP in the related art, and can implement the SD alarm notification function on the IP/MPLS network. Compared with the AIS alarm function of MPLS-TP, the AIS alarm transmission and processing overhead can be saved, and additional LSPs can be re-established on the link.

Preferably, the first determining module 100 may include: a detecting unit (not shown) configured to detect that there is an SD fault on the link; a receiving unit (not shown) configured to receive the second node by The preset protocol adds an announcement that occurs after the status information of the SD fault exists on the link.

Preferably, the generating module 102 may include: a packaging unit (not shown) configured to unify the identification information of one or more LSPs having the same destination node by using an IP and UDP encapsulation manner after detecting the SD failure. The packet is encapsulated into an IP packet or a UDP packet, and one or more first SD fault alarm information packets are generated. The identifier unit (not shown) is configured to use the UDP port number identifier in the IP packet or the UDP packet. The type of the one or more first SD fault alarm information packets is an SD alarm information type.

Preferably, as shown in FIG. 9, the system may further include: a plurality of end nodes 20; each end node 20 may include: a second determining module 200 configured to determine, by using a UDP port number, that the received packet type is The first SD fault alarm information message; the execution module 202 is configured to trigger one or more LSPs where the end node is located according to the identifier information of one or more LSPs carried in the received first SD fault alarm information message Switching operation between the active and standby paths.

Preferably, as shown in FIG. 9, each end node 20 may further include: a receiving module 204, configured to receive a second SD fault alarm information message corresponding to the end node from the second node; The module 206 is configured to determine that an SD fault occurs on the link according to the first SD fault alarm information message fed back by the first node and the second SD fault alarm information message fed back by the second node.

The above preferred implementation process will be further described below in conjunction with the preferred embodiment illustrated in FIG.

10 is a block diagram showing the structure of an SD fault notification and positioning system in accordance with a preferred embodiment of the present invention. As shown in FIG. 10, the SD fault notification and positioning system may include: a link node and a client layer LSP upper node, where the link node may include: an advertisement module, a package module, and a transmission module, and the application module exists at the client layer. The upper node of the LSP. In the preferred embodiment, the functions of the various modules are as follows:

The notification module (corresponding to the first determining module) is mainly configured to detect the SD fault information in one direction, and notify the upstream node of the SD fault state information by adding the port SD state information in the link layer discovery protocol (LLDP).

The encapsulation module (corresponding to the above-mentioned generation module) is mainly configured to have the same destination node and be affected by the link SD failure after the link layer detects an SD failure (for example, an error detection mechanism such as CRC, CFM, and TMS). The LSP identifier (ID) information of multiple client layers is encapsulated into the same IP/UDP packet, and then the specific UDP port number is used to identify the type of the SD alarm information.

The transmitting module (corresponding to the sending module) is mainly configured to send the encapsulated SD fault information to the corresponding client layer LSP upper node through IP and UDP on the node that detects the link layer SD fault. on.

The application module (equivalent to the above-mentioned execution module and the third determination module) is mainly configured to trigger the LSP active/standby switchover or the location of the fault location according to the LSP affected by the fault when receiving the SD fault alarm information.

From the above description, it can be seen that the above embodiments achieve the following technical effects (it is required that these effects are achievable by some preferred embodiments): the technical solution provided by the embodiments of the present invention relates to traffic engineering ( In the field of operation management and maintenance (OAM) of the network, the SD signal degradation information can be sent to the service link through the IP and User Datagram Protocol (UDP) mode when the link layer is used to detect the SD fault information. Both ends of the client LSP are transmitted to complete the location of the SD fault location and the active/standby switchover of the corresponding LSP, thereby implementing the SD fault location and advertisement function on the IP/MPLS network LSP, and effectively avoiding the large number of transmissions due to the AIS. The generated AIS message processing and transmission overhead.

It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

As described above, the method and system for processing a signal degradation fault provided by the embodiment of the present invention have the following beneficial effects: when detecting the SD fault information by using the link layer, the SD signal degradation information can be sent by using IP and UDP methods. To the two-node nodes on the customer LSP transmitted on the service link, in order to complete the location of the SD fault location and the active/standby switchover of the corresponding LSP, thereby implementing the SD fault location and notification function on the IP/MPLS network LSP, which can also be effective. AIS message processing and transmission overhead due to a large number of AIS transmissions is avoided.

Claims

A method for processing a signal degradation fault, comprising:

Determining, by the first node, that the link between the first node and the second node has a signal degradation SD fault, wherein the first node and the second node are common links of the plurality of label switching channels LSP Adjacent two nodes;

The first node generates one or more first SD fault alarm information messages according to the status information of the SD fault occurring on the link, where each first SD fault alarm information message carries Identification information of one or more LSPs where the end node corresponding to the first SD fault alarm information packet is located;

The first node sends each first SD fault alarm information message to a corresponding end node, where each first SD fault alarm information message is used by the corresponding end node according to the first SD fault. The identification information of the one or more LSPs carried in the alarm information packet determines that an SD fault occurs on the link, and/or triggers one or more LSPs where the end node is located to perform a switching operation between the active and standby paths. .
The method of claim 1, wherein the determining, by the first node, that the link has the SD fault comprises one of the following:

The first node detects that the SD fault exists on the link;

The first node receives an advertisement that occurs after the second node adds the state information of the SD fault on the link by adding in a preset protocol.
The method of claim 1, wherein the generating, by the first node, the one or more first SD fault alarm information messages comprises:

After detecting the SD fault, the first node uniformly encapsulates the identifier information of one or more LSPs with the same destination end node into the IP packet and the UDP packet through the Internet Protocol IP and the UDP encapsulation mode of the user data packet protocol. And generating the one or more first SD fault alarm information messages;

The first node uses the IP packet and the UDP port number in the UDP packet to identify the type of the SD fault alarm information packet as an SD alarm information type.
The method of claim 3, wherein after the first node sends each of the first SD fault alarm information messages to the corresponding end node, the method further includes:

The corresponding end node determines, by using the UDP port number, that the received packet type is an SD fault alarm information packet;

The end node triggers the switching of the active/standby path by one or more LSPs where the end node is located according to the identifier information of the one or more LSPs that are carried in the received first SD fault alarm information packet. operating.
The method according to claim 3 or 4, wherein after the first node sends each first SD failure alarm information message to the corresponding end node, the method further includes:

The corresponding end node receives a second SD fault alarm information message corresponding to the end node from the second node;

The corresponding end node determines that an SD fault occurs on the link according to the first SD fault alarm information message fed back by the first node and the second SD fault alarm information message fed back by the second node.
A processing system for signal degradation failure, comprising: a first node;

The first node includes:

a first determining module, configured to determine that a signal degradation SD fault exists between the first node and the second node, where the first node and the second node pass through a plurality of label switching channels LSP Adjacent two nodes of the public link;

a generating module, configured to generate one or more first SD fault alarm information messages according to the status information of the SD fault occurring on the link, where each first SD fault alarm information message carries Identification information of one or more LSPs where the end node corresponding to the first SD fault alarm information packet is located;

a sending module, configured to send each first SD fault alarm information message to a corresponding end node, where each first SD fault alarm information message is used by the corresponding end node according to the first SD fault The identification information of the one or more LSPs carried in the alarm information packet determines that an SD fault occurs on the link, and/or triggers one or more LSPs where the end node is located to perform a switching operation between the active and standby paths. .
The system of claim 6 wherein said first determining module comprises:

a detecting unit, configured to detect that the SD fault exists on the link;

And a receiving unit, configured to receive, by the second node, an announcement that occurs after the presence of the status information of the SD fault on the link is added in a preset protocol.
The system of claim 6 wherein said generating module comprises:

The encapsulation unit is configured to uniformly encapsulate the identification information of one or more LSPs having the same destination end node into the IP packet or the UDP packet by using the Internet Protocol IP and the User Data Protocol (UDP) encapsulation mode after detecting the SD fault. And generating the one or more first SD fault alarm information messages;

The identifier unit is configured to identify, by using the IP packet or the UDP port number in the UDP packet, the type of the SD fault alarm information packet as an SD alarm information type.
The system of claim 8 wherein said system further comprises: a plurality of end nodes;

Each end node includes:

a second determining module, configured to determine, by using the UDP port number, that the received packet type is an SD fault alarm information packet;

The execution module is configured to trigger one or more LSPs in which the end node is located to perform the switching operation of the active/standby path according to the identifier information of the one or more LSPs that are carried in the received first SD fault alarm information packet .
The system of claim 9 wherein each of said end nodes further comprises:

a receiving module, configured to receive a second SD fault alarm information message corresponding to the end node from the second node;

The third determining module is configured to determine that an SD fault occurs on the link according to the first SD fault alarm information message fed back by the first node and the second SD fault alarm information message fed back by the second node.