WO2011095135A1

WO2011095135A1 - Method, device and system for the protection of intersection ring networks

Info

Publication number: WO2011095135A1
Application number: PCT/CN2011/070881
Authority: WO
Inventors: 陈建群
Original assignee: 华为技术有限公司
Priority date: 2010-02-04
Filing date: 2011-02-01
Publication date: 2011-08-11
Also published as: CN102148733B; CN102148733A

Abstract

The present invention discloses a method, device and system for the protection of intersection ring networks. Two ring networks intersect at two intersection nodes, and the method for the protection of intersection ring networks includes the following steps: the intersection node at which a service does not cross the rings receives a packet, and forwards the packet according to forwarding information which is obtained by the synchronization with the forwarding information of the intersection node at which the service crosses the rings. With the use of the invention, a protection switching for intersection rings is achieved.

Description

The present invention claims to be submitted to the Chinese Patent Office on February 4, 2010, and the application number is CN 201010113711. The invention name is "an intersecting ring network protection method, device and system" Priority of Chinese Patent Application, the entire contents of which is incorporated herein by reference. Technical field

The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, and a system for protecting an intersecting ring network.

Background technique

Multi-Protocol Label Switch (MPLS) technology is a technology that uses label switching technology to implement fast packet switching transmission. Traditionally, MPLS networks use Fast Reroute (FRR), linear automatic protection switching (APS), and some existing MPLS ring technologies to protect services.

The existing MPLS ring protection scheme is based on the physical ring topology and performs service up and down and protection switching on the Label Switch Path (LSP) layer. In this solution, a closed-loop protection LSP is configured for each working LSP on the ring. When the link or node through which the working LSP passes needs to perform protection switching, the service is switched to the corresponding protection LSP.

In the process of implementing the present invention, the inventors found that: In the intersecting ring scenario, the protection switching cannot be effectively performed.

Summary of the invention

The technical problem to be solved by the embodiments of the present invention is to provide a method, a device and a system for protecting an intersecting ring network, and implementing protection switching of intersecting rings.

To solve the above technical problem, the embodiment of the intersecting ring network protection method provided by the present invention can be implemented by the following technical solutions:

There are two intersecting nodes between the two rings, including:

The two nodes in the two intersecting nodes do not receive the packet, and the packet is forwarded according to the forwarding information synchronized with the forwarding information of the node that crosses the ring.

An intersecting ring network protection device, comprising: a message receiving unit, configured to receive a message;

The synchronization unit is configured to forward the information obtained by synchronizing with the forwarding information of the node across the ring. The message forwarding unit is configured to forward the message according to the forwarding information obtained by synchronizing with the forwarding information of the node that crosses the ring.

An intersecting ring network protection system, comprising: two intersecting nodes between two ring networks are intersecting cross-ring nodes, intersecting non-cross-ring nodes,

The intersecting non-cross-ring node is configured to receive a message, and forward the packet according to the forwarding information obtained by synchronizing with the forwarding information of the intersecting cross-ring node.

The foregoing technical solution has the following beneficial effects: the non-cross-ring node in the intersecting node synchronizes the forwarding information of the cross-ring node in the intersecting node, and forwards the received packet according to the forwarding information obtained by the synchronization; Switched.

DRAWINGS

In order to explain the embodiments of the present invention more clearly, the following drawings will be briefly described in the description of the embodiments. It is obvious that the drawings in the following description are only some embodiments of the present invention. For ordinary technicians, other drawings can be obtained based on these drawings without paying for creative labor.

1 is a schematic diagram showing the structure of a cross-ring node in the implementation of the present invention;

2 is a flowchart of a method on a cross-ring node according to an embodiment of the present invention;

3 is a schematic structural diagram of an exemplary system according to an embodiment of the present invention;

4 is a schematic structural diagram of another example system according to an embodiment of the present invention;

FIG. 5 is a structural diagram of an apparatus for intersecting a non-cross-ring node according to an embodiment of the present invention; FIG.

FIG. 6 is a structural diagram of an apparatus for intersecting a non-cross-ring node according to a first type of cross-ring service according to an embodiment of the present invention; FIG. 7 is a structural diagram of a device for intersecting a non-cross-ring node of a third type of cross-ring service according to an embodiment of the present invention; EMBODIMENT OF THE INVENTION A device structure diagram of a second type of cross-ring service intersecting a non-cross-ring node; FIG. 9 is a structural diagram of an intersecting ring network protection system according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the embodiments described are only a part of the embodiments of the present invention, but not all embodiments. . Based on the embodiments of the present invention, those of ordinary skill in the art do not make All other embodiments obtained under the premise of creative labor are within the scope of the invention. In a ring network in the embodiment of the present invention, there are four annular paths logically, which are a clockwise direction working direction of the ring and a counterclockwise ring protection channel corresponding thereto, a counterclockwise ring working direction, and a corresponding smoothing direction. The clockwise direction ring protects the channel, and the packet has been configured with the working direction before it enters the ring. The business in the clockwise direction is protected by the counterclockwise protection channel, and the counterclockwise direction of operation is protected by the clockwise protection channel. The above-mentioned annular path or channel is a logical link, which can be carried on a physical two-fiber or four-fiber ring.

The ring network protection service can be an LSP or a Pseudo-Wire (PW). If the service is an LSP, the tunnel forms a logical ring channel. If the protected service is a PW, the LSP constitutes a logical ring. Shaped passage.

The user needs to specify the source node on the ring, the direction of the service work, and the sink node for the service, and accordingly, the intermediate node that the service passes in the working direction can be obtained.

The user needs to specify the bandwidth information for the ring channel, and the four ring channels are consistent. When a user configures a service (LSP or PW), the sum of the bandwidths of all services cannot exceed the bandwidth configured by the ring channel.

Only the ring nodes passing through the service (LSP or PW) need the configuration information of the service, and other nodes do not need the configuration information of the service. The label switching process of the service is consistent with the label forwarding process of the existing standard, that is, the valid tag that is identifiable in the forwarding entry is processed according to the forwarding entry of the tag.

The fault detection between adjacent nodes on the ring network can be implemented by using the method in the fast re-routing mechanism (such as the link layer protocol, the resource reservation protocol (SVP) hello mechanism, etc.), or according to the operation management. Operation (administration, administration and maintenance, OAM) fault detection method implementation. The ring protection switching notification mechanism is similar to the ring APS mechanism in the existing Synchronous Digital Hierarchy (SDH) multiplex section protection ring. The protection switching message is not limited to the OAM packet of the data plane, the protocol packet of the control plane, and other packet types. I will not repeat them here. Through the above means, the network node can know whether each ring needs to perform protection switching in the event of a failure.

When the LSP is in the ring, the LSP label can be exchanged at the source node. The label of the intermediate switch node remains unchanged. The label can be exchanged before the ring node is looped out. Label switching can also be performed on each node on the ring. . If label switching is required, it needs to pass through the node through which each LSP passes. The signaling or network management device configures all downstream label information on the LSP to ensure that the correct label can be exchanged according to the specific fault location after the protection switching.

When forwarding a data packet to the ring protection channel, you need to press a protection LSP (protection-LSP) label or a protection label for the protection label. All the labels of the data packets can be configured according to the network management or the signaling. The processing of the protection LSP on the ring node can be label-switched or the label can be changed. The solution in the implementation of the present invention does not limit this.

If there is an intersecting ring network in the communication network, there is a cross-ring service. Then, the two guard rings intersect each other to perform some service configuration synchronization to support the intersecting node failure protection scenario and some multi-point failure protection scenarios.

Cross-ring business is divided into three categories:

The first type is through an intersecting node;

The second type is the crossover of the first intersecting node that passes through two intersecting nodes but passes through the service; the third type is the crossover of the second intersecting node that passes through two intersecting nodes but passes through the service. The method for confirming the cross-ring service and the service cross-ring node may be: If a service enters from a non-intersecting node of one ring, passes through one or two intersecting nodes in the middle, and exits from a non-intersecting node of another ring, the service is called Cross-ring business. If the service passes through only one intersecting node, the intersecting node is called a cross-ring intersecting node, and the service is a first type of cross-ring service; if the service enters from a ring interface of the first intersecting node, the intersecting The other interface of the ring reaches the second intersecting node, and the second intersecting node enters the second ring, and the second intersecting node is called the cross-ring intersecting node, and the service is the third type of cross-ring service;杲 The service enters from a ring interface of the first intersecting node, and from one interface of the other ring of the intersecting node to the second intersecting node, the first intersecting node is called a cross-ring intersecting node, and the service is笫Two types of cross-ring business;

An embodiment of the present invention is described below with reference to FIG. 1 and FIG. 2, wherein FIG. 2 is a schematic diagram of a method flow, and FIG. 1 is a schematic diagram of a cross-ring node for performing the method flow in FIG. The specific processing method is the same when the protected service is PW.

As shown in Figure 1, each node on the ring contains two interfaces, one called the eastbound interface and one called the westbound interface. Each interface can send and receive packets. The difference from the other nodes is that the cross-ring node includes two ring instances, and the two ring instances are connected through the service access ring interface. The eastbound interface and the westbound interface of each ring instance can be connected to other nodes of the ring where the ring instance is located. Processing module Perform business processing when the message enters and exits the ring.

An intersecting ring network protection method, as shown in FIG. 2, there are two intersecting nodes between two ring networks, including:

201: The node that does not cross-loop receives the packet from the two intersecting nodes that are in the two intersecting nodes;

202: Forward the packet according to the forwarding information obtained by synchronizing the forwarding information with the node that crosses the ring. Specifically, the embodiment of the present invention further provides a more detailed solution for the above three types of cross-ring services. In the following embodiments, the first ring is a ring that is service-introduced, and the second ring is intersected with the first ring. The ring network is no longer described in the description of the subsequent implementation examples. The configuration information of each cross-ring service LSP needs to be synchronized from the cross-ring intersecting node of the service path to the non-cross-ring intersecting node, so that the non-cross-ring intersecting node can identify the service to support the intersecting node failure protection scenario and some multi-point failure protection. Scenes. Configuration synchronization can be done by the network management or control plane.

For example, for the first type of cross-ring business:

If the service only passes through the first intersecting node, the forwarding information of the service is synchronized to the second intersecting node, and is activated on the second intersecting node, where the activation may be to refresh the forwarding entry in the forwarding table or refresh other corresponding affected services. For the forwarding process, the first intersecting node is the source node of the forwarding information, and the second intersecting node needs to change the direction of the forwarding working interface forwarded by the LSP to the interface facing the first intersecting node, and does not need to encapsulate other labels, and the ring protection channel is The corresponding ring of the second ring protects the channel and needs to be pressed into the corresponding protective tag.

The receiving of the packet by the node that does not cross-loop among the two intersecting nodes of the foregoing cross-ring service includes: when the cross-ring service passes only the first intersecting node of the two intersecting nodes, the second intersecting node receives the packet. In the first type of cross-ring service, if the nodes of the first ring do not perform protection switching, the service does not pass through the second intersecting node. When a service needs to perform protection switching on a node of a ring in the first ring, the node pushes a house tag in addition to the valid service tag of the packet of the service, and the tag is opposite to the direction of the service path. The protection label of the direction, and forwards the message in the opposite direction to the direction of the service path. At this time, the second intersecting node will receive the message.

The forwarding of the packet according to the forwarding information obtained by synchronizing the forwarding information of the node with the cross-ring includes: forwarding the packet according to the forwarding information synchronized with the forwarding information of the first intersecting node; If the outermost label of the above-mentioned text is the protection label of the first ring and the protection switching needs to be performed on the first ring, the protection label of the first ring is popped up, and the effective service label of the first ring is exchanged. For the effective service label of the second ring, when protection switching needs to be performed on the second ring, the protection label of the second ring is laminated to the outermost part of the message, and the message is forwarded to the protection channel of the second ring. If the outermost label of the above-mentioned 4th document is the protection label of the first ring and the protection switching needs to be performed on the first ring, the protection label of the first ring is popped up, and the effective service of the first ring is The label is exchanged for the effective service label of the second ring. When the protection switching is not required on the second ring, the packet is forwarded to the first intersecting node.

For the third type of cross-ring business:

If the service is cross-ring transmission through two intersecting nodes, and the second intersecting node performs cross-ring transmission, the second intersecting node discovers that the service already exists on the first intersecting node when synchronizing the forwarding information of the service (ie, If the intersection node has the forwarding information of the normal cross-ring transmission of the service, the corresponding synchronization information is not activated immediately. The activation may be a process of refreshing the forwarding entry in the forwarding table or refreshing other corresponding services that affect service forwarding. The system needs to pass the fault detection mechanism (may be

The OAM/APS notification mechanism, or other protocol mechanism, detects whether the first intersecting node is completely completely isolated from the second intersecting node on the first ring (possibly because the second intersecting node fails or the link is interrupted multiple times) After the topology is completely isolated, the corresponding synchronization information is activated, and the first intersecting node changes the working forwarding working interface forwarded by the service in the forwarding table to the interface facing the first intersecting node, and does not need to encapsulate other labels, and the ring protection channel is the second. The corresponding ring of the ring protects the channel and needs to be pressed into the corresponding protective label. If the service is an LSP and the LSP label switching is configured, for example, the LSP label of the first ring is switched to the LSP label of the second ring, the forwarding table of the first intersecting node exchanges the LSP label of the first ring to the second ring. In addition to the forwarding information of the LSP label, the forwarding information of the LSP label of the second ring needs to be stored, and the forwarding information is consistent with the forwarding information of the LSP label exchanged by the LSP label of the first ring to the second ring.

The node that does not perform cross-ring reception in the two intersecting nodes of the foregoing cross-ring service includes: when the cross-ring service passes through the first intersecting node of the two intersecting nodes, and passes through the second of the two intersecting nodes. An intersecting node, the cross-ring service spans the ring at the second intersecting node, and the first intersecting node and the second intersecting node are completely topically isolated on the first ring, the first intersecting node receives 4 abundance; the above-mentioned basis and the cross-ring Forwarding information synchronized by the forwarding information of the node to forward the packet The first intersecting node 4 forwards the packet according to the forwarding information obtained by synchronizing with the forwarding information of the second intersecting node.

If the outermost layer of the packet is the valid service label of the first ring and the protection switching needs to be performed on the first ring, the effective service label of the first ring of the packet is exchanged for the effective service label of the second ring. The protection label of the foregoing packet that is laminated to the second ring is forwarded to the first intersecting node when the protection switching is not required on the second ring;

If the outermost layer of the packet is the valid service label of the first ring and the protection switching needs to be performed on the first ring, the effective service label of the first ring of the packet is exchanged to the effective service label of the second ring. When the protection switching needs to be performed on the second ring, the protection label of the second ring is laminated on the outermost part of the above message, and the above text is forwarded to the protection channel of the second ring.

For the second type of cross-ring business:

The service is cross-ringed by two intersecting nodes, and the first intersecting node performs cross-ring. If the service is an LSP, and the LSP needs to implement label switching during the forwarding process, the first-phase intersecting node synchronizes the forwarding information of the LSP to the first The two intersecting nodes enable the service to perform the same label exchange on the second intersecting node as the first intersecting node, and the forwarding action and the forwarding direction are the same as the forwarding action and the forwarding direction of the corresponding service configured by the second intersecting node. For example, if the label 1 is switched to the label 2 on the first intersecting node, the second intersecting node needs to configure a forwarding entry, and the label 1 is switched to the label 2, and the label 1 is exchanged for the forwarding action and forwarding direction of the label 2. The forwarding action and forwarding direction of the label 2 service configured by the latter intersecting node are the same.

The node that does not perform cross-ring reception in the two intersecting nodes of the foregoing cross-ring service includes: when the cross-ring service passes through the first intersecting node of the two intersecting nodes, and passes through the second of the two intersecting nodes. Intersecting the node, and the cross-ring service receives the message when the first intersecting node crosses the ring;

The message forwarding according to the forwarding information obtained by synchronizing the forwarding information with the forwarding information of the cross-ring node includes: the second intersecting node forwards the packet according to the forwarding information synchronized with the forwarding information of the first intersecting node; Forwarding specifically includes:

If the outermost label of the above-mentioned 4艮 is the protection label of the first ring and the protection switching needs to be performed on the first ring, the protection label of the first ring is popped up, and the first ring of the first ring is reported. The effective service label is exchanged for the effective service label of the second ring. When protection switching is not required on the second ring, Transmitting the packet to the working direction of the packet in the second ring, where the first ring is a ring network into which the service is ringed, and the second ring is a ring network intersecting the first ring;

If the outermost label of the above-mentioned text is the protection label of the first ring and the protection switching needs to be performed on the first ring, the protection label of the first ring is popped up, and the effective service of the first ring of the packet is performed. The label is switched to the effective service label of the second ring. When the protection switching needs to be performed on the second ring, the protection label of the second ring is laminated on the outermost part of the message, and is forwarded to the protection channel of the second ring. Fan message.

In the above implementation, the non-cross-ring nodes in the intersecting nodes obtain the forwarding information of the cross-ring nodes in the intersecting nodes, and forward the received packets according to the forwarding information obtained by the synchronization; and implement the protection switching of the intersecting rings. The packet encapsulation format of the ring service packets on the inbound and outbound interfaces and the working direction of the ring is as follows. Service packets transmitted in the working direction of the ring are also encapsulated below, and do not need to be pushed into a layer of labels.

Table 1. Packet encapsulation format

The Protocol Data Unit (PDU) is used for the encapsulated data transmitted between the mobile station and the peer layer of the base station.

Only when the packet is switched to the protection channel, you need to press a layer of protection LSP label. The package format is as follows:

Table 2. Packet format encapsulating the protection label

A specific application scenario of the present embodiment will describe the configuration of the nodes in the two intersecting ring networks, the configuration of the service, the forwarding, and the details of the fault switching in the first type of cross-ring service. As shown in FIG. 3, a schematic diagram of a system for intersecting ring protection, nodes Al, Bl, CI, and Iw, Ie form a protection first ring; Point A2, B2, C2, and Iw, le are configured to protect the second ring; the service is an LSP, and the value of the service LSP label before and after the label switching is unchanged (or no label switching is performed), and the unidirectional service LSP label is on the first ring. 101, on the second ring is 102. The working direction entry node is Al, the passing nodes are Iw, A2, B2, and the outgoing ring node is C2. The corresponding protection LSP label of the LSP on the first ring is 1001, and the corresponding protection LSP label on the second ring is 1002. The intersecting nodes of the two rings are Iw and Ie. The services of protecting the second ring between Iw and le are respectively transmitted through the physical link between P2 of interface Iw and P2 of le. The services for protecting the first ring between Iw and le are respectively transmitted through the physical link between P3 of interface Iw and P3 of le.

The label is not used for label switching on the ring network node as an example:

The configuration of each ring network node is as follows:

Table 3, the configuration of node A1 is as follows:

1002 Swap (if you need 1002 (no need to do P2)

Carry out protection and reverse protection

Then change to Pop)

Table 6. The configuration of node C2 is as follows:

Incoming tag Action Swap or Push tag Forwarding work interface Protection interface Protection tag

102 exchange LSP standard

Configure values for users

And forwarded to the business

Outgoing interface

1002 Swap (If you need 1002 (no need to P2)

Perform protection switching. Protect the switching directly.

Then change to Pop)

Table 7, Node B 1, C1 configuration is as follows:

Incoming tag Action Swa or Push tag Forwarding working interface Protection interface Protection tag

1001 Swap (If you need 1001 (no need to do P2)

Perform protection switching. Protect the switching directly.

Then change to Pop)

Table 8. Nodes [e's configuration is as follows:

Into the standard action Swa or Push tick Forward work connection α protection interface protection tick

1001 Swap (if required 1001 (no need to Ρ3

Perform protection switching

Then change to Pop)

1002 Swap (if required 1002 (does not need PI

Perform protection switching

Then change to Pop)

101 Swap 102 P2 P1 1002

According to the configuration in Table 3 to Table 8 above, the forwarding process of the service packets after entering the ring under normal conditions and abnormal conditions is as follows:

Under normal circumstances: 301A: The service with the LSP label of 101 enters from the Al node, and the forwarding table is searched and forwarded to the interface P1.

302A: The above-mentioned reporter enters from the Iw node, searches for the label 101, and switches the LSP label to 102, and forwards it to the interface PU.

303A: The foregoing packet enters from the A2 node, searches for the tag 102, and acts as the switching service LSP tag 102 and forwards it to the interface P1.

304A: The incoming message enters from the B2 node, searches for the tag 102, and acts as the switching service. The LSP label is 102 and is forwarded to the interface P1.

305A: The packet enters from the C2 node and searches for the label 102. The action is to exchange the LSP label into a user configuration value and forward it to the service outgoing interface. If the Iw node fails, the packet forwarding path is switched to:

301B: The service with the LSP label of 101 is accessed from the A1 node. After the forwarding table is searched, it is found that the outbound interface corresponding to the working ring label 101 detects the fault, that is, the protection switching needs to be performed on the first ring, and the 1001 label is marked and forwarded to the interface. P2.

302B: The message is entered from the B1 node, and the label 1001 is searched. The outer label is switched to 1001 and the message is forwarded to the interface P2.

303B: The above packet enters from the C1 node, searches for the label 1001, and acts as the exchange outer label to be 1001 and forwards the ■3⁄4 text to the corresponding interface.

304B: The foregoing packet enters from the Ie node, searches for the label 1001, and needs to perform protection switching on the first ring. Therefore, if the action is Pop, the label 101 is continuously searched, and the LSP label is switched to 102, because the working interface P2 still detects. To the fault, that is, the protection switching needs to be performed on the second ring, so the protection label 1002 is pushed on the push and forwarded to the interface P1.

305B: The foregoing packet enters from the C2 node, searches for the label 1002, and acts as the outer layer label 1002 and forwards the packet to the interface P2.

306B: The foregoing packet enters from the B2 node, searches for the label 1002, and acts as the outer layer label 1002 and forwards the packet to the interface P2.

307B: The hacker enters from the A2 node and looks up the tag 1002, and needs to perform protection switching on the second ring. Therefore, if the action is Pop, the tag 102 is continuously searched, and the switch is activated as an exchange tag. 102 and forwarded to interface P1.

308B: The incoming message enters from the B2 node, searches for the tag 102, and acts as the switching service. The LSP label is 102 and the message is forwarded to the interface P1.

309B: The foregoing packet is sent from the C2 node to find the label 102. The action is to exchange the LSP label into the user configuration value and forward it to the service outgoing interface.

In the above implementation, the information of the switching label and the forwarding information after the cross-ring are stored in the cross-ring node. When the node needs to perform protection switching, the protection label is pushed in. When the cross-ring is performed, the protection label is popped up, and the forwarding label is forwarded according to the cross-ring. Information forwarding packets implement protection switching of intersecting rings. In the specific application scenario corresponding to Figure 3 above, the Iw and the Ie can be connected through only one physical interface. The services on the unprotected ring are logically distinguished by the LSP label and run on the same physical link. If the implementation mechanism and the forwarding mechanism of the connection between the Iw and the Ie are only through one physical interface, the implementation mechanism and the forwarding mechanism corresponding to the foregoing embodiment of FIG. 3 are exactly the same, and will not be further described herein. The difference is that when there are two physical interfaces in the configuration, they are respectively forwarded to different physical interfaces as needed. In this embodiment, the two physical interfaces are combined into one.

In the network shown in Figure 4, the protection between the first ring and the protection second ring exists between D1-D2 and E1-E2. If there is a network protection function between the two connections, D1, D2 can be used. The E2 and E1 are configured as the protection ring 3, so that the entire network link is protected. For the protection mechanism of the intersecting ring network, refer to the specific application scenario corresponding to Figure 3. I will not repeat them here.

In the above embodiment, regardless of the number of physical links between the intersecting rings, the information of the exchange label and the forwarding information after the cross-ring are stored in the cross-ring node; when the node needs to perform protection switching, the protection label is pushed in, When the ring is opened, the protection label is ejected, and the forwarding information is forwarded according to the forwarding information after the cross-ring, so that the protection switching of the intersecting ring is realized. The embodiment of the present invention further provides an intersecting ring protection device, as shown in FIG. 5, including: a message receiving unit 501, configured to receive a message,

The synchronization unit 502 is configured to forward the information obtained by synchronizing with the forwarding information of the node across the ring. The message forwarding unit 503 is configured to perform packet forwarding according to the forwarding information obtained by synchronizing with the forwarding information of the node that crosses the ring. Specifically, the embodiment of the present invention further provides a more detailed solution for the above three types of cross-ring services: For the first type of cross-ring service, as shown in FIG. 7:

When the cross-ring service passes only the first intersecting node of the two intersecting nodes, the intersecting ring protection device is the second intersecting node;

The synchronization unit 502 includes: a first synchronization subunit 502A, configured to synchronize forwarding information with the first intersection node to obtain forwarding information;

The packet forwarding unit 503 includes: a first packet forwarding unit 503A, configured to: when the outermost label of the packet is the protection label of the first ring, and the protection switching needs to be performed on the first ring, The protection label of the first ring is ejected, and the effective service label of the first ring is exchanged into the effective service label of the second ring. When the protection switching is not required on the second ring, the first intersecting node is forwarded to the first ring node. Message.

The first packet forwarding unit 503 A is further configured to: if the outermost label of the packet is the protection label of the first ring and the protection switching needs to be performed on the first ring, The protection label is ejected, and the effective service label of the first ring is exchanged for the effective service label of the second ring. When the protection switching needs to be performed on the second ring, the protection label of the second ring is laminated on the outermost layer of the above message. And forwarding the message to the protection channel of the second ring, where the first ring is a ring network in which the service is ringed, and the second ring is a ring network intersecting the first ring.

For the third type of cross-ring business, as shown in Figure 8:

The cross-ring service first passes through the first intersecting node of the two intersecting nodes, passes through the two intersecting nodes of the two intersecting nodes, the cross-ring service crosses the ring at the second intersecting node, and the first intersecting node and the second intersecting node When the first ring is completely topically isolated, the intersecting ring protection device is a first intersecting node;

The synchronization unit 502 includes: a second synchronization subunit 502B, configured to synchronize forwarding information with the second intersection node to obtain forwarding information;

The packet forwarding unit 503 includes: a second packet forwarding unit 503B, configured to: if the outermost layer of the packet is an active service label of the first ring, and the protection switching needs to be performed on the first ring, The effective service label of the first ring is exchanged for the effective service label of the second ring. When the protection switching is not required on the second ring, the first intersecting node is forwarded to the upper node.

The second packet forwarding unit 503B is further configured to: if the outermost layer of the packet is the first ring When the service label is required and the protection switching needs to be performed on the first ring, the effective service label of the first ring of the packet is exchanged for the effective service label of the second ring, and when the protection switching needs to be performed on the second ring, The outermost layer of the message is laminated into the protection label of the second ring, and the message is forwarded to the protection channel of the second ring.

For the second type of cross-ring business, as shown in Figure 9:

The cross-ring service first passes through the first intersecting node of the two intersecting nodes, passes through the second intersecting node of the two intersecting nodes, and when the cross-ring service crosses the ring at the first intersecting node, the upper fascia ring protection device is Second intersecting section;

The synchronization unit 502 includes: a third synchronization subunit 502C, configured to synchronize forwarding information with the first intersection node to obtain forwarding information;

The packet forwarding unit 503 includes: a third packet forwarding unit 503C, configured to: when the outermost label of the packet is the protection label of the first ring and the protection switching needs to be performed on the first ring, The protection label of the first ring is ejected, and the effective service label of the first ring of the packet is exchanged into the effective service label of the second ring. When the protection switching is not required on the second ring, the foregoing The first ring is the ring network where the service is ringed, and the second ring is the ring network intersecting the first ring.

The third packet forwarding unit 503C is further configured to: when the outermost label of the packet is the protection label of the first ring and the protection switching needs to be performed on the first ring, the protection of the first ring is performed. The label is ejected, and the effective service label of the first ring of the packet is exchanged for the effective service label of the second ring. When the protection switching needs to be performed on the second ring, the outermost layer of the above packet is layered into the second ring. Protect the label and forward the above to the protection channel of the second ring.

In the above implementation, the non-cross-ring nodes in the intersecting nodes obtain the forwarding information of the cross-ring nodes in the intersecting nodes, and forward the received packets according to the forwarding information obtained by the synchronization; and implement the protection switching of the intersecting rings. The embodiment of the present invention further provides an intersecting ring network protection system. As shown in FIG. 10, two intersecting nodes between the two ring networks are intersecting cross-ring nodes 901 and intersecting non-cross-ring nodes 902. The non-cross-loop node 902 is configured to receive a message, and forward the message according to the forwarding information synchronized with the forwarding information of the intersecting cross-ring node 901. Specifically, the embodiment of the present invention further provides a more detailed solution for the above three types of cross-ring services: For the first type of cross-ring service:

Receiving the message by the intersecting non-cross-ring node 902 includes: when the cross-ring service passes only the first intersecting node of the two intersecting nodes, the second intersecting node is configured to receive the message;

The intersecting non-cross-ring node, configured to perform forwarding according to the forwarding information synchronized with the forwarding information of the intersecting cross-ring node 901, includes: a second intersecting node, configured to synchronize according to forwarding information with the first intersecting node The forwarding information is forwarded by the packet. The above-mentioned message forwarding includes: if the outermost label of the above-mentioned 4 艮 text is the protection label of the first ring and the protection switching needs to be performed on the first ring, The protection label of the first ring is ejected, and the effective service label of the first ring is switched to the effective service label of the second ring. When the protection switching is not required on the second ring, the first intersecting node is forwarded to the message. .

The above message forwarding also includes:

If the outermost label of the above-mentioned text is the protection label of the first ring and the protection switching needs to be performed on the first ring, the protection label of the first ring is popped up, and the effective service label of the first ring is exchanged to The effective service label of the second ring, when protection switching needs to be performed on the second ring, the protection label of the second ring is laminated to the outermost part of the message, and the message is forwarded to the protection channel of the second ring. The first ring is a ring network in which the service enters the ring, and the second ring is a ring network intersecting the first ring.

For the third type of cross-ring business:

The intersecting non-cross-ring node 902 receiving the message includes: when the cross-ring service passes through the first one of the two intersecting nodes, passes through the second intersecting node of the two intersecting nodes, and the cross-ring service intersects at the second When the node crosses the ring, and the first intersecting node and the second intersecting node are completely completely isolated on the first ring, the first intersecting node is configured to receive the message;

And the intersecting non-cross-ring node, and the forwarding of the forwarding information according to the forwarding information synchronized with the forwarding information of the intersecting cross-ring node 901 includes: a first intersecting node, configured to forward according to the synchronization information with the forwarding information of the second intersecting node The information is forwarded by the packet. The foregoing packet forwarding includes: if the outermost layer of the packet is a valid service label of the first ring, and the protection switching needs to be performed on the first ring, the first ring of the packet is The effective service label is exchanged for the effective service label of the second ring. When the protection switching is not required on the second ring, the first intersecting node is forwarded to the above-mentioned report.

The above message forwarding also includes: If the outermost layer of the packet is the valid service label of the first ring and the protection switching needs to be performed on the first ring, the effective service label of the first ring of the packet is exchanged for the effective service label of the second ring. When the protection switching needs to be performed on the second ring, the protection label of the second ring is laminated on the outermost part of the above message, and the above-mentioned information is forwarded to the protection channel of the second ring.

For the second type of cross-ring business:

Receiving the message by the intersecting non-cross-ring node 902 includes: when the cross-ring service passes through the first intersecting node of the two intersecting nodes, passes through the second intersecting node of the two intersecting nodes, and the cross-ring service is at the first When the intersecting node crosses the ring, the second intersecting node receives the message;

The foregoing intersecting non-cross-ring node, and the forwarding of the forwarding information according to the forwarding information synchronized with the forwarding information of the intersecting cross-ring node 901 includes: a second intersecting node, configured to forward according to the forwarding information with the first intersecting node The information is forwarded by the message; the above-mentioned message forwarding includes: if the outermost label of the above-mentioned 4艮 text is the protection label of the first ring and the protection switching needs to be performed on the first ring, the foregoing A protection label of a ring is ejected, and the effective service label of the first ring of the packet is exchanged for the effective service label of the second ring. When the protection switching is not required on the second ring, the foregoing message to the second ring is The working direction forwards the foregoing packet, where the first ring is a ring network in which the service is ringed, and the second ring is a ring network intersecting the first ring.

The above message forwarding also includes:

If the outermost label of the above-mentioned 4th document is the protection label of the first ring and the protection switching needs to be performed on the first ring, the protection label of the first ring is popped up, and the first ring of the message is The effective service label is exchanged as the effective service label of the second ring. When the protection switching needs to be performed on the second ring, the protection label of the second ring is laminated to the outermost part of the above message, and the protection channel to the second ring is protected. Forward the above message.

In the above implementation, the non-cross-ring nodes in the intersecting nodes obtain the forwarding information of the cross-ring nodes in the intersecting nodes, and forward the received packets according to the forwarding information obtained by the synchronization; and implement the protection switching of the intersecting rings.

In the above implementation, the information about the switching label is stored in the cross-ring node and the forwarding information is transmitted after the cross-ring; when the node needs to perform protection switching, the protection label is pushed in, and when the cross-ring is performed, the protection label is popped up, and according to the cross-ring The forwarding information is forwarded and reported, and the protection switching of the intersecting ring is realized.

One of ordinary skill in the art can understand all or part of the steps in the method of implementing the above embodiments. The related hardware may be instructed by a program, and the above program may be stored in a computer readable storage medium, and the storage medium mentioned above may be a read only memory, a magnetic disk or an optical disk.

The method for the protection of the intersecting ring network, the ring network node and the system provided by the embodiment of the present invention are described in detail. The principle and the embodiment of the present invention are described in the specific examples. The description of the above embodiment is only The method for understanding the present invention and its core idea; at the same time, for the person of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific embodiment and the scope of application, in summary, the content of the present specification It should not be construed as limiting the invention.

Claims

Claim

K An intersecting ring network protection method, characterized in that there are two intersecting nodes between two ring networks, including:

2. The method of claim 1 wherein:

The receiving, by the node that does not cross-ring, of the two intersecting nodes that the cross-ring service passes includes: when the cross-ring service passes only the first intersecting node of the two intersecting nodes, the second intersecting node receives the packet. ;

The forwarding of the packet according to the forwarding information obtained by synchronizing the forwarding information of the node with the cross-ring includes: forwarding the packet according to the forwarding information obtained by synchronizing with the forwarding information of the first intersecting node;

If the outermost label of the packet is the protection label of the first ring and the protection switching needs to be performed on the first ring, the protection label of the first ring is popped, and the effective service of the first ring is The label is switched to the effective service label of the second ring. When the protection switching is not required on the second ring, the message is forwarded to the first intersecting node.

The method according to claim 2, wherein the performing the message forwarding further comprises: if the outermost label of the packet is read as the protection label of the first ring and is needed on the first ring When the protection switching is performed, the protection label of the first ring is popped up, and the effective service label of the first ring is exchanged for the effective service label of the second ring. When the protection switching needs to be performed on the second ring, the report is The outermost layer is integrated into the protection label of the second ring, and the packet is forwarded to the protection channel of the second ring, where the first ring is a ring into which the service enters the ring, and the second ring is the first ring Rings intersecting the ring.

The method according to claim 1, wherein the receiving of the packet by the node that does not cross-loop among the two intersecting nodes that the cross-ring service passes includes: when the cross-ring service passes through the two intersecting nodes The first intersecting node passes through the second intersecting node of the two intersecting nodes, the cross-ring service crosses the ring at the second intersecting node, and the first intersecting node and the second intersecting node are completely topologically on the first ring When isolated, the first intersecting node receives the message;

The forwarding of the packet according to the forwarding information obtained by synchronizing with the forwarding information of the node that is in the cross-loop includes: forwarding, by the first intersecting node, the packet forwarding according to the forwarding information synchronized with the forwarding information of the second intersecting node; Forwarding specifically includes: If the outermost layer of the packet is the valid service label of the first ring and the protection switching needs to be performed on the first ring, the effective service label of the first ring of the packet is switched to the effective service label of the second ring. When the protection switching is not required on the second ring, the message is forwarded to the first intersecting node.

The method according to claim 4, wherein the performing packet forwarding further comprises: if the outermost layer of the packet is an effective service label of the first ring, and the protection switching needs to be performed on the first ring. When the effective service label of the first ring of the packet is switched to the effective service label of the second ring, when the protection switching needs to be performed on the second ring, the second ring is laminated at the outermost part of the message. The tag is protected and the message is forwarded to the protection channel of the second ring.

The method according to claim 1, wherein the receiving, by the node that does not cross-loop among the two intersecting nodes that the cross-ring service passes includes: when the cross-ring service passes through the two intersecting nodes first The first intersecting node passes through the second intersecting node of the two intersecting nodes, and the cross-ring service crosses the ring at the first intersecting node, and the second intersecting node receives the message;

The forwarding of the packet according to the forwarding information obtained by synchronizing with the forwarding information of the node that is in the cross-loop includes: forwarding, by the second intersecting node, the packet forwarding according to the forwarding information synchronized with the forwarding information of the first intersecting node; Forwarding specifically includes:

If the outermost label of the packet is the protection label of the first ring and the protection switching needs to be performed on the first ring, the protection label of the first ring is popped, and the first ring of the packet is opened. The effective service label is switched to the effective service label of the second ring. When the protection switching is not performed on the second ring, the packet is forwarded to the working direction of the packet in the second ring, where the first ring is forwarded. The ring that is the ring that the service enters, and the second ring is the ring that intersects with the first ring.

The method according to claim 6, wherein the performing packet forwarding further comprises: if the outermost label of the packet is read as a protection label of the first ring and required on the first ring When the protection switching is performed, the protection label of the first ring is ejected, and the effective service label of the first ring of the packet is exchanged into the effective service label of the second ring. When the protection switching needs to be performed on the second ring, The outermost layer of the message is laminated into the protection label of the second ring, and the message is forwarded to the protection channel of the second ring.

8. An intersecting ring network protection device, comprising:

a message receiving unit, configured to receive a report;

a synchronization unit, configured to forward information obtained by synchronizing with forwarding information of a node that crosses the ring; The packet forwarding unit is configured to forward the packet according to the forwarding information obtained by synchronizing with the forwarding information of the node that crosses the ring.

The intersecting ring protection device according to claim 8, wherein when the cross-ring service passes only the first intersecting node of the two intersecting nodes, the intersecting ring protection device is a second intersecting node; The method includes: a first synchronization subunit, configured to synchronize forwarding information with the first intersecting node to obtain forwarding information;

The packet forwarding unit includes: a first packet forwarding unit, configured to: if the outermost label of the packet is the protection label of the first ring, and the protection switching needs to be performed on the first ring, The protection label of the first ring is popped up, and the effective service label of the first ring is exchanged into the effective service label of the second ring. When the protection switching is not needed on the second ring, the first intersecting node is forwarded to the first intersecting node. Said message.

10. The intersecting ring protection device of claim 9 wherein:

The first packet forwarding unit is further configured to: when the outermost label of the packet is the protection label of the first ring, and the protection switching needs to be performed on the first ring, the first ring is The protection label is popped up, and the effective service label of the first ring is exchanged for the effective service label of the second ring. When the protection switching needs to be performed on the second ring, the second ring is laminated at the outermost part of the message. And protecting the label, and forwarding the packet to the protection channel of the second ring, where the first ring is a ring network that enters the ring, and the second ring is a ring network that intersects the first ring.

11. The intersecting ring protection device according to claim 8, wherein the cross-ring service first passes through one of two intersecting nodes, passes through a second intersecting node of the two intersecting nodes, and cross-ring service When the second intersecting node crosses the ring, and the first intersecting node and the second intersecting node are completely completely isolated on the first ring, the intersecting ring protection device is a first intersecting node;

The synchronization unit includes: a second synchronization subunit, configured to synchronize forwarding information with the second intersection node to obtain forwarding information;

The packet forwarding unit includes: a second packet forwarding unit, configured to: if the outermost layer of the packet is an effective service label of the first ring, and the protection switching needs to be performed on the first ring, The effective service label of the first ring is exchanged for the effective service label of the second ring. When the protection switching is not required on the second ring, the reported message is forwarded to the first intersecting node.

12. The intersecting ring protection device of claim 11 wherein: The second packet forwarding unit is further configured to: if the outermost layer of the packet is an effective service label of the first ring, and the protection switching needs to be performed on the first ring, the first ring of the packet is valid. The service label is exchanged as the effective service label of the second ring. When the protection switching needs to be performed on the second ring, the protection label of the second ring is laminated to the outermost part of the message, and the protection channel to the second ring is protected. Forward the message.

13 . The intersecting ring protection device according to claim 8 , wherein the cross-ring service first passes through a first intersecting node of the two intersecting nodes, passes through a second intersecting node of the two intersecting nodes, and crosses the ring When the first intersecting node crosses the ring, the intersecting ring protection device is a second phase corpus; the synchronization unit includes: a third synchronization subunit, configured to synchronize forwarding information with the first intersecting node to obtain forwarding information;

The packet forwarding unit includes: a third packet forwarding unit, configured to: if the outermost label of the packet is the protection label of the first ring, and the protection switching needs to be performed on the first ring, The protection label of the first ring is ejected, and the effective service label of the first ring of the packet is exchanged for the effective service label of the second ring. When the protection switching is not required on the second ring, the second ring is used. The working direction of the packet forwards the packet, where the first ring is a ring network in which the service is ringed, and the second ring is a ring network intersecting the first ring.

14. An intersecting ring protection device according to claim 11 wherein:

The third packet forwarding unit is further configured to: when the outermost label of the packet is the protection label of the first ring, and the protection switching needs to be performed on the first ring, the first ring is The protection label is displayed, and the effective service label of the first ring of the packet is exchanged for the effective service label of the second ring. When the protection switching needs to be performed on the second ring, the outermost layer of the message is laminated. The protection label of the second ring forwards the packet to the protection channel of the second ring.

An intersecting ring network protection system, comprising: two intersecting nodes between two ring networks are intersecting cross-ring nodes, intersecting non-cross-ring nodes, wherein:

The intersecting non-cross-ring node is configured to receive a packet, and forward the packet according to the forwarding information obtained by synchronizing with the forwarding information of the intersecting cross-ring node.

The system according to claim 15, wherein the intersecting non-cross-ring node receiving the message comprises: when the cross-ring service passes only the first intersecting node of the two intersecting nodes, the second intersecting node , used to receive newspapers;

The intersecting non-cross-ring node is configured to be synchronized according to forwarding information with intersecting cross-ring nodes The forwarding of the message for the packet forwarding includes: a second intersecting node, configured to forward the packet according to the forwarding information obtained by synchronizing the forwarding information with the first intersecting node; The outermost label of the text is the protection label of the first ring, and when the protection switching needs to be performed on the first ring, the protection label of the first ring is popped, and the effective service label of the first ring is exchanged for the second ring. The valid service label forwards the message to the first intersecting node when protection switching is not required on the second ring.

The system according to claim 16, wherein the forwarding of the message further comprises: if the outermost label of the packet is read as the protection label of the first ring and is needed on the first ring When the protection switching is performed, the protection label of the first ring is popped up, and the effective service label of the first ring is exchanged for the effective service label of the second ring. When the protection switching needs to be performed on the second ring, the report is The outermost layer is integrated into the protection label of the second ring, and forwards the message to the protection channel of the second ring, where the first ring is a ring into which the service enters the ring, and the second ring is the first ring Rings intersecting the ring.

The system according to claim 15, wherein the intersecting non-cross-ring node receiving the message comprises: when the cross-ring service first passes through the first intersecting node of the two intersecting nodes, after the two a second intersecting node in the intersecting node, the cross-ring service spanning the second intersecting node, and the first intersecting node and the second intersecting node are completely topically isolated on the first ring, the first intersecting node is configured to receive Message

And the intersecting non-cross-ring node, configured to perform packet forwarding according to the forwarding information synchronized with the forwarding information of the intersecting cross-ring node, including: a first intersecting node, configured to forward according to synchronization information with the forwarding information of the second intersecting node The information is forwarded by the packet. The packet forwarding includes: if the outermost layer of the packet is a valid service label of the first ring, and the protection switching needs to be performed on the first ring, the packet is first. The effective service label of the ring is exchanged for the effective service label of the second ring. When the protection switching is not required on the second ring, the information is forwarded to the first intersecting node.

The system according to claim 18, wherein the performing packet forwarding further comprises: if the outermost layer of the packet is an active service label of the first ring, and the protection switching needs to be performed on the first ring. When the effective service label of the first ring of the packet is switched to the effective service label of the second ring, when the protection switching needs to be performed on the second ring, the outer ring of the message is layered into the second ring. The tag is protected and forwarded to the protection channel of the second ring.

20. The system of claim 15 wherein said intersecting non-cross-ring node receives The method includes: when the cross-ring service passes through the first intersecting node of the two intersecting nodes, passes through the second intersecting node of the two intersecting nodes, and the cross-ring service crosses the ring at the first intersecting node The second intersecting node receives the text;

And the intersecting non-cross-ring node, configured to perform packet forwarding according to the forwarding information synchronized with the forwarding information of the intersecting cross-ring node, where: the second intersecting node is configured to perform forwarding according to synchronization with the forwarding information of the first intersecting node. The information is forwarded by the message. The message forwarding includes: if the outermost label of the packet is the protection label of the first ring, and the protection switching needs to be performed on the first ring, The protection label of the first ring is ejected, and the effective service label of the first ring of the packet is switched to the effective service label of the second ring. When the protection switching is not required on the second ring, the report to the second ring is performed. The working direction of the text forwards the packet, the first ring is a ring network into which the service is ringed, and the second ring is a ring network intersecting the first ring.

The system according to claim 20, wherein the performing packet forwarding further comprises: if the outermost label of the packet is read as a protection label of the first ring and required on the first ring When the protection switching is performed, the protection label of the first ring is ejected, and the effective service label of the first ring of the packet is exchanged into the effective service label of the second ring. When the protection switching needs to be performed on the second ring, The outermost layer of the message is layered into the protection label of the second ring, and the message is forwarded to the protection channel of the second ring.