CN103701677A - Looped network protection method, network node and looped network - Google Patents
Looped network protection method, network node and looped network Download PDFInfo
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- CN103701677A CN103701677A CN201310659484.6A CN201310659484A CN103701677A CN 103701677 A CN103701677 A CN 103701677A CN 201310659484 A CN201310659484 A CN 201310659484A CN 103701677 A CN103701677 A CN 103701677A
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Abstract
The embodiment of the invention provides a looped network protection method, a network node and a looped network. The looped network protection method comprises the steps that when the looped network has a fault, the network node receives a looped network protection switching request message sent by a node with a fault through detection; the looped network protection switching request message carries source and sink node information of the looped network protection switching request message; a fault position is determined according to the source and sink node information; a protection tunnel is selected according to the determined fault position; a service is switched to the selected protection tunnel; and the selected protection tunnel is a link protection tunnel of a link between the network node and a source node, or a node protection tunnel of an intermediate node on a minor axis between the network node and the source node. With the adoption of the technical scheme, the service can be switched to the protection tunnel when a link fault or a node fault appears in the looped network, so that normal transmission of the service is ensured.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of ring net protection method, network node and loop network.
Background technology
In recent years, packet-switch technology is universal very fast, starts to enter operator and transmits network.Multiprotocol label switching (Multiple Protocol Label Switch, the MPLS) network of packet-switch technology adopts fully connected topology conventionally at present, and transmits network due to its deployment feature, conventionally adopts ring topology structure.Traditional transport network is as SDH(Synchronized Digital Hierarchy, synchronous digital hierarchy) network mostly adopts ring topology networking, and according to the feature of looped network, realized the quick protective switch of business.Actual deployment proves, in the SDH epoch, the application of ring and demand are very general.In transport network, by SDH, be transitioned into after packet switching network, because the optical fiber of disposing in advance remains ring-type, so also there is wide application prospect in the looped network technology of packet switching network.
Now, can be in looped network for every link establishment link protection tunnel or for each node, set up Node Protection tunnel, still, if only tunnel is protected in link connection, during node failure, cannot protect node; If only set up Node Protection tunnel, as shown in Figure 1, for Node B is set up Node Protection tunnel T, if between A, B during link occurs fault, for realizing normal transmission in the upper and lower business of Node B.
Summary of the invention
The embodiment of the present invention provides a kind of ring net protection method, network node and network system, and in the time of can there is link failure or node failure in looped network, selecting properly protection tunnel, to guarantee business normal transmission.
In view of this, the embodiment of the present invention provides:
A ring net protection method, comprising:
When looped network breaks down, network node receives the looped network protection switching request message that the node of fault sends, source, the destination node information of carrying described looped network protection switching request message in described looped network protection switching request message of detecting;
According to described source, destination node information, determine abort situation, according to determined abort situation, select protection tunnel, switch the business to selected protection tunnel; Selected protection tunnel is the link protection tunnel of link between described network node and source node, or the Node Protection tunnel of the intermediate node on minor axis between described network node and source node.
A ring net protection method, comprising:
When looped network breaks down; first node is according to the failure condition in the protection tunnel of setting up in advance; select protection tunnel; switch the business to selected protection tunnel; and on selected protection tunnel, send protection switching request message, notify the other end node in selected protection tunnel to switch the business to selected protection tunnel.
A ring net protection method, comprising:
When looped network breaks down, first node sends respectively protection switching request message on the link protection tunnel of link between first node and Section Point and the Node Protection tunnel of Section Point;
On the link protection tunnel of link between first node and Section Point or the Node Protection tunnel of Section Point, receive to be responsible to replace and switch response message;
Switch the business to and receive described protection and switch on the protection tunnel of response message.
A network node, described network node is arranged in loop network, comprising:
Receiving element, for receiving looped network protection switching request message, carries source, the destination node information of described looped network protection switching request message in described looped network protection switching request message;
Protection tunnel selected cell, for according to described source, destination node information, determines abort situation, according to determined abort situation, selects protection tunnel; Wherein, selected protection tunnel is the link protection tunnel of link between described source node and described network node, or the Node Protection tunnel of intermediate node on minor axis between described source node and described network node;
A network node, described network node is arranged in loop network, comprising:
Selected cell, for according to the failure condition in the protection tunnel of setting up in advance, selects protection tunnel;
Switch unit, for switching the business to selected protection tunnel;
Transmitting element, for sending protection switching request message on selected protection tunnel.
A network node, comprising:
Transmitting element, for sending respectively protection switching request message on the Node Protection tunnel of the link protection tunnel at link between network node and Section Point and Section Point;
Receiving element, switches response message for receiving to be responsible to replace on the Node Protection tunnel of the link protection tunnel at link between network node and Section Point or Section Point;
Switch unit, receives for switching the business to the protection tunnel that response message is switched in described protection.
A loop network, comprising:
Node one, for detection of to network failure, sends looped network protection switching request message, source, the destination node information of in described looped network protection switching request message, carrying described looped network protection switching request message to node two;
Node two; be used for according to described source, destination node information; determine abort situation; according to determined abort situation; select protection tunnel; switch the business to selected protection tunnel, selected protection tunnel is the link protection tunnel of described node two and a link of node, or the Node Protection tunnel of the intermediate node on described node two and minor axis of node.
A loop network, comprising: first node, Section Point and the 3rd node, and wherein, described Section Point is adjacent with the 3rd node with first node respectively,
First node, the failure condition in the protection tunnel of setting up in advance for basis, select protection tunnel, switch the business to selected protection tunnel, and on selected protection tunnel, sending protection switching request message, selected protection tunnel is the link protection tunnel of link between first node and Section Point or the Node Protection tunnel of Section Point;
Section Point, if for receiving described protection switching request message on the link protection tunnel at link between first node and Section Point, switch the business to the link protection tunnel of link between first node and Section Point;
The 3rd node, if for receiving described protection switching request message on the Node Protection tunnel at Section Point, switch the business to the Node Protection tunnel of described Section Point.
A loop network, comprising: first node, Section Point and the 3rd node, and wherein, described Section Point is adjacent with the 3rd node with first node respectively,
First node, for sending respectively protection switching request message on the Node Protection tunnel of the link protection tunnel at link between first node and Section Point and Section Point; On the link protection tunnel of link between first node and Section Point or the Node Protection tunnel of Section Point, receive to be responsible to replace and switch response message, switch the business to and receive described protection and switch on the protection tunnel of response message;
Section Point, if for receive protection switching request message on the link protection tunnel of link between first node and Section Point, switch the business to the link protection tunnel of link between described first node and Section Point, and response message is switched in transmission protection on the link protection tunnel of link between first node and Section Point;
The 3rd node; if for receive protection switching request message on the Node Protection tunnel of Section Point; and described end points detected and have fault at itself and first node minor axis side; switch the business to the Node Protection tunnel of described Section Point, on the Node Protection tunnel of described Section Point, send to be responsible to replace and switch response message.
One embodiment of the invention receives after looped network protection switching request message at network node; according to this looped network protection switching request message, determine the abort situation of looped network; according to the abort situation of looped network, select protection tunnel; switch the business on selected protection tunnel, can normal transmission with assurance business.
In another embodiment of the present invention, first node is selected protection tunnel according to the malfunction in the protection tunnel of setting up in advance; and the other end that makes to protect tunnel by send protection switching request message on selected protection tunnel knows and should switch the business to this protection tunnel, can normal transmission with assurance business.
In another embodiment of the present invention, first node sends respectively protection switching request message on two protection tunnels (the link protection tunnel of link and the Node Protection tunnel of Section Point between first node and Section Point); switch the business to receive to protect and switch on the protection tunnel of response message, can normal transmission with assurance business.
Accompanying drawing explanation
Fig. 1 protects link schematic diagram in the fully connected topology that provides of prior art;
Fig. 2 is the protection tunnel schematic diagram that the embodiment of the present invention provides;
Fig. 3 is the ring net protection method schematic diagram that the embodiment of the present invention two provides;
Fig. 4 is the ring net protection method schematic diagram that the embodiment of the present invention three provides;
Fig. 5 is the ring net protection method schematic diagram that the embodiment of the present invention four provides;
Fig. 6 is the network node structure figure that the embodiment of the present invention 13 provides;
Fig. 7 is the network node structure figure that the embodiment of the present invention 14 provides;
Fig. 8 is the network node structure figure that the embodiment of the present invention 15 provides.
Embodiment
Embodiment mono-:
The embodiment of the present invention provides a kind of ring net protection method, comprising:
When looped network breaks down, network node receives the looped network protection switching request message that the node of fault sends, source, the destination node information of carrying described looped network protection switching request message in described looped network protection switching request message of detecting;
According to described source, destination node information, determine abort situation, according to determined abort situation, select protection tunnel, switch the business to selected protection tunnel; Selected protection tunnel is the link protection tunnel of link between described network node and source node, or the Node Protection tunnel of the intermediate node on minor axis between described network node and source node.
The embodiment of the present invention one receives after looped network protection switching request message at network node; according to the looped network protection switching request message receiving, determine the abort situation of looped network; according to the abort situation of this looped network; (selected protection tunnel is the link protection tunnel of link between this network node and source node to select protection tunnel; or the Node Protection tunnel of intermediate node on minor axis between this network node and source node), switching the business to selected protection tunnel can normal transmission with assurance business.
For making the embodiment of the present invention clearer; the embodiment of the present invention is that each node on looped network is set up protection tunnel in advance; it is Node Protection tunnel; for every link establishment protection tunnel between adjacent node; it is link protection tunnel; suppose on a ring and have n node, the protection tunnel number of setting up on this looped network is: n bar Node Protection tunnel+n bar link protection tunnel=2n bar protection tunnel.Take Fig. 2 as example, suppose on looped network that one has eight node A, B, C, D, E, F, G, H, vertical 16 the protection tunnels of building together, in Fig. 2, arcuation thick dashed line is link protection tunnel, arcuation heavy line is Node Protection tunnel.
Wherein, major diameter is walked in the Node Protection tunnel in this embodiment mono-and subsequent embodiment.
Embodiment bis-:
Consult Fig. 3, the embodiment of the present invention two provides a kind of ring net protection method, and the method is applicable to the protection of link failure; in the method, suppose that node A is to the unidirectional link failure of Node B; Node B detects fault, and Node B sends looped network protection switching request message, and the method specifically comprises:
Node B oppositely sends looped network protection switching request message on looped network; in this message, carry source node information and destination node information; i.e. (B; A); wherein, source, destination node are respectively source, the destination nodes of looped network protection switching request message, and source node is Node B; destination node is for node adjacent with Node B in the direction of fault to be detected in Node B, i.e. node A.
Other node sequence on looped network receive this looped network protection switching request message; according to the destination node information in this message, judge whether destination node is oneself; if not; judge whether oneself detects fault; if not; this looped network protection switching request message is transparent to next node, in this embodiment, Node B sends looped network protection switching request message and is transparent to node A via node C, node D, node E, node F, node G, node H.
Node A receives after looped network protection switching request message; according to the destination node validation of information in this message, it oneself is destination node; according to the topology of looped network; know the link failure between node A and Node B; switch the business to link protection tunnel T1; and on looped network, send looped network protection switching response message, in this looped network protection switching response message, carry sourcesink nodal information (A, B).
Node B is received after looped network protection switching response message, switches the business to link protection tunnel T1.
The embodiment of the present invention two is at node A during to unidirectional link failure between Node B; Node B sends looped network protection switching request message at looped network in the other direction; node A receives after looped network protection switching request message; when determining while oneself being destination node; switch the business to link protection tunnel, can normal transmission with assurance business.
Embodiment tri-:
Consult Fig. 4; the embodiment of the present invention three provides a kind of ring net protection method; the method is applicable to the protection of link failure; in the method, suppose that between node A and Node B, two-way link all breaks down; node A and Node B all detect fault; node A and Node B oppositely send respectively looped network switching request message on looped network, and the method specifically comprises:
Node A and Node B oppositely send looped network protection switching request message on looped network; In the looped network protection switching request message that node A sends, carry sourcesink nodal information (A, B), in the looped network protection switching request message that Node B sends, carry sourcesink nodal information (B, A);
The node that receives looped network protection switching request message judges according to the destination node information in message whether destination node is oneself, if not, judge whether oneself detects fault, if not, looped network protection switching request message transparent transmission is outputed to next node; The looped network protection switching request message order of carrying sourcesink nodal information (A, B) that in this embodiment, node A sends is transparent to Node B via node H, node G, node F, node E, node D, node C; The looped network protection switching request message order of carrying sourcesink nodal information (B, A) that Node B sends is transparent to node A via node C, node D, node E, node F, node G, node H;
Node B determines oneself to be destination node according to the destination node information in this looped network protection switching request message, according to the topology of looped network, know the link failure between node A and Node B, switch the business to link protection tunnel T1, by looped network, send looped network protection switching response message, in this message, carry sourcesink nodal information (B, A); Node A determines oneself to be destination node according to the destination node information in this message, according to the topology of looped network, know the link failure between node A and Node B, switch the business to link protection tunnel T1, by looped network, send looped network protection switching response message, in this message, carry sourcesink nodal information (A, B);
Node A, Node B receive respectively looped network protection switching response message, all protect and switch, attonity.
The embodiment of the present invention three is at node A during to two-way link fault between Node B; Node B and node A send respectively looped network protection switching request message on looped network; node A and Node B are respectively after receiving looped network protection switching request message; when determining while oneself being destination node; switch the business to link protection tunnel, can normal transmission with assurance business.
Embodiment tetra-:
Consult Fig. 5; the embodiment of the present invention four provides a kind of ring net protection method; the method is applicable to the protection of node failure; in the method, suppose the Node B fault between node A and node C; node A and node C detect fault; node A and node C oppositely send respectively looped network switching request message on looped network, and the method specifically comprises:
Node A and node C oppositely send looped network protection switching request message on looped network, in the looped network protection switching request message that node A sends, carry sourcesink nodal information (A, B), in the looped network protection switching request message that node C sends, carry sourcesink nodal information (C, B);
The looped network protection switching request message order of carrying sourcesink nodal information (A, B) that this node A sends is transparent to node C via node H, node G, node F, node E, node D; The looped network protection switching request message order of carrying sourcesink nodal information (C, B) that node C sends is transparent to node A via node D, node E, node F, node G, node H;
Node C determines it oneself is not destination node according to the destination node information in the looped network protection switching request message receiving, node C detects its minor axis side in Node B fault, according to sourcesink nodal information and network topology structure, determine Node B fault, switch the business to Node Protection tunnel T3, by looped network, send protection and switch response message, protection is switched and in response message, is carried sourcesink nodal information (C, B); Node A determines it oneself is not destination node according to the destination node information in the looped network protection switching request message receiving; node A detects its minor axis side in Node B fault; according to sourcesink nodal information and network topology structure; determine Node B fault; switch the business to Node Protection tunnel T3; by looped network, send looped network protection switching response message, in this message, carry sourcesink nodal information (A, B).
Node A, node C receive respectively looped network protection switching response message, all protect and switch, attonity.
The embodiment of the present invention four is at node A during to Node B fault between node C; node C and node A send respectively looped network protection switching request message on looped network; node A and node C are respectively after receiving looped network protection switching request message; when determining, it oneself not destination node and while fault being detected again; switch the business to Node Protection tunnel, can normal transmission with assurance business.
When each embodiment of the invention described above breaks down on looped network; the adjacent node of network failure detects after fault; by looped network protection switching mechanism; selecting corresponding link or Node Protection tunnel to protect switches; follow-up various embodiments of the present invention detect the adjacent node of describing network failure after fault; to, by linear protection switching mechanism, select corresponding link or Node Protection tunnel to protect and switch.
Wherein, the detection of the adjacent node of network failure to fault, can utilize the method in the rapid rerouting mechanism of existing ietf definition to realize (as link layer protocol, RSVP (Resource Reservation Protocol, RSVP) hello mechanism etc.), also can be according to the OAM(Operation of ITU-T definition, administration and maintenance, operation management maintain) fault detection method realization, repeat no more herein.
Embodiment five:
The embodiment of the present invention five provides a kind of ring net protection method, comprising:
First node is according to the failure condition in the protection tunnel of setting up in advance; select protection tunnel; switch the business to selected protection tunnel; and on selected protection tunnel, send protection switching request message, notify the other end node in selected protection tunnel to switch the business to selected protection tunnel.
Wherein, on selected protection tunnel, send and protect the mode of switching request message to include but not limited to following mode: on protection tunnel, send OAM message, the form of this OAM message is as shown in table 1 below:
| Tunnel?Label | LSP?Label | OAM?PDU |
Table 1
Wherein, Tunnel Label is the label in selected protection tunnel; OAM PDU comprises protection switching request message; Concrete, the intermediate node on protection tunnel is by this OAM message repeating to next node, and the other end node in protection tunnel, according to the protection switching request message in this OAM message, is determined and should be switched the business on this protection tunnel.
In the embodiment of the present invention five, first node is according to the failure condition in the protection tunnel of setting up in advance; select the protection tunnel of switching for business; and switch the business to selected tunnel; by send protection switching request message on selected protection tunnel, make to protect the other end in tunnel know and should switch the business to this protection tunnel, can normal transmission with assurance business.
Wherein, first node can be the Node B in subsequent embodiment six, or node A or Node B in subsequent embodiment seven, or the node A in subsequent embodiment eight or node C.
Embodiment six:
Consult Fig. 2, the embodiment of the present invention six provides a kind of ring net protection method, supposes that node A is to the link failure of Node B in the method, and Node B detects fault, and in the method, Node B sends protection switching request message on protection link, and the method specifically comprises:
Whether Node B detects link protection tunnel fault, if not, selects link protection tunnel T1 as the protection tunnel of this business transmission, switches the business to link protection tunnel T1, and on this link protection tunnel T1, sends protection switching request message.
Intermediate node on link protection tunnel T1 receives this protection switching request message, identical with the processing mode that receives normal data message or control protocol, and protection switching request message is forwarded to next node.
Another end points of node A(link protection tunnel T1) receive protection switching request message; switch the business to link protection tunnel T1, and response message is switched in transmission protection on link protection tunnel T1, Node B receives protection and switches response message; realized link protection change, attonity.
The embodiment of the present invention six is when node A arrives the unidirectional link failure of Node B; switch the business on link protection tunnel; and switching request message is protected in transmission on link protection tunnel; the other end in link protection tunnel is known and should be switched the business to this link protection tunnel, to guarantee business normal transmission.
Embodiment seven:
Consult Fig. 2; the embodiment of the present invention seven provides a kind of ring net protection method, supposes the two-way link fault between node A and Node B in the method, and node A and Node B all detect the fault on looped network; and on link protection link, send respectively switching request message, the method specifically comprises:
Node B does not detect fault on link protection tunnel, selects link protection tunnel T1 as the protection tunnel of this business transmission, switches the business to link protection tunnel T1, and on this link protection tunnel T1, sends protection switching request message; Node A does not detect fault on link protection tunnel, selects link protection tunnel T1 as the protection tunnel of this business transmission, switches the business to link protection tunnel T1, and on this link protection tunnel T1, sends protection switching request message;
Node A, Node B receive respectively the protection switching request message that the other side (Node B, node A) sends on link protection tunnel T1, have all carried out link protection change, and attonity sends protection and switches response message on link protection tunnel.
Node A, Node B receive respectively the protection that the other side (Node B, node A) sends on link protection tunnel T1 and switch response message, attonity.
The embodiment of the present invention seven is when node A arrives the two-way link fault of Node B; node A, Node B switch the business to respectively on link protection tunnel; and switching request message is protected in transmission on link protection tunnel; the other end in link protection tunnel is known and should be switched the business to this link protection tunnel, to guarantee business normal transmission.
Embodiment eight:
Consult Fig. 2, the embodiment of the present invention eight provides a kind of ring net protection method, supposes Node B fault in the method; node A and node C detect fault; node A and node C all detect the fault on looped network, and on Node Protection link, send switching request message respectively, and the method specifically comprises:
Node A detects link protection tunnel T1 fault, and Node Protection tunnel T3 being detected does not have fault, selects Node Protection tunnel T3 to protect and switches, and on Node Protection tunnel T3, send protection switching request message; Node C detects link protection tunnel T2 fault, and Node Protection tunnel T3 being detected does not have fault, selects Node Protection tunnel T3 to protect and switches, and on Node Protection tunnel T3, send protection switching request message;
Node A, node C receive respectively the protection switching request message that the other side (node C, node A) sends on Node Protection tunnel T3, have all carried out Node Protection and have switched, attonity; Node A, node C send respectively protection and switch response message on Node Protection tunnel T3;
Node A, node C receive respectively the protection that the other side (node C, node A) sends on Node Protection tunnel T3 and switch response message, attonity.
The embodiment of the present invention eight is when Node B fault; node A, node C switch the business to respectively on Node Protection tunnel; and switching request message is protected in transmission on Node Protection tunnel; the other end in Node Protection tunnel is known and should be switched the business to this link protection tunnel, to guarantee business normal transmission.
Embodiment nine:
The embodiment of the present invention nine provides a kind of ring net protection method, comprising:
First node sends respectively protection switching request message on the link protection tunnel of link between first node and Section Point and the Node Protection tunnel of Section Point;
On the link protection tunnel of link between first node and Section Point or the Node Protection tunnel of Section Point, receive to be responsible to replace and switch response message;
Switch the business to and receive described protection and switch on the protection tunnel of response message.
Wherein, on protection tunnel, send and protect the mode of switching request message to include but not limited to following mode: on protection tunnel, send OAM message.
Wherein, first node can be that node A, Section Point in subsequent embodiment are that Node B, the 3rd node in subsequent embodiment is the node C in subsequent embodiment.
In the embodiment of the present invention nine, first node sends respectively protection switching request message on link protection tunnel and Node Protection tunnel, switches the business to receive to protect to switch on the protection tunnel of response message, can normal transmission with assurance business.
Embodiment ten:
Consult Fig. 2; the embodiment of the present invention ten provides a kind of ring net protection method; in the method, suppose that node A is to the unidirectional link failure of Node B; Node B detects fault; in the method, Node B all sends protection switching request message on link protection tunnel and Node Protection tunnel, and the method specifically comprises:
Node B sends protection switching request message on link protection tunnel T1 and Node Protection tunnel T4.
Intermediate node on link protection tunnel T1 and Node Protection tunnel T4 receives respectively protection switching request message, identical with the processing mode that receives normal data message or control protocol, and protection switching request message is forwarded to next node.
Node H receives the protection switching request message on Node Protection tunnel T4, and detecting oneself does not have fault to the network of node A side, does not move.
Node A receives the protection switching request message on link protection tunnel T1, selects link protection tunnel T1 to protect and switches, and switch response message by this link protection tunnel T1 transmission protection.
Node B receives node A and on link protection tunnel T1, sends protection and switch response message, selects link protection tunnel T1 to protect and switches.
When in the embodiment of the present invention ten, node A arrives the unidirectional link failure of Node B; Node B sends respectively protection switching request message on link protection tunnel and Node Protection tunnel; node A receives protection switching request message on link protection tunnel; switch the business to link protection tunnel, can normal transmission with assurance business.
Embodiment 11:
Consult Fig. 2; the embodiment of the present invention 11 provides a kind of ring net protection method; in the method, suppose the two-way link fault between node A and Node B, node A and Node B all send respectively protection switching request message on link protection tunnel and Node Protection tunnel, and the method specifically comprises:
Node A sends protection switching request message at link protection tunnel T1, sends protection switching request message on Node Protection tunnel T3 simultaneously; Node B sends protection switching request message on link protection tunnel T1, sends protection switching request message on Node Protection tunnel T4 simultaneously;
Node A, Node B receive respectively the protection switching request message that the other side (Node B, node A) sends on link protection tunnel T1, select link protection tunnel T1 to carry out link protection change, and switch response message by link protection tunnel T1 transmission protection;
Node C, node H receive respectively the protection switching request message that node A, Node B send on Node Protection tunnel T3 and T4, but the local corresponding failure that B-C or A-H side do not detected, attonity;
Node A, Node B receive respectively the protection that the other side (Node B, node A) sends on link protection tunnel T1 and switch response message, have all carried out link protection change, attonity.
The embodiment of the present invention 11 is when node A arrives the two-way link fault of Node B; node A and Node B all send respectively protection switching request message on link protection tunnel and Node Protection tunnel; the peer node in link protection tunnel (Node B and node A) receives protection switching request message on link protection tunnel; switch the business to link protection tunnel, can normal transmission with assurance business.
Embodiment 12:
Consult Fig. 2; the embodiment of the present invention 12 provides a kind of ring net protection method; in the method, suppose Node B fault; node A and node C detect fault; node A and node C all detect fault; and on link protection tunnel and Node Protection link, send respectively protection switching request message, the method specifically comprises:
Node A sends protection switching request message at link protection tunnel T1, sends protection switching request message on Node Protection tunnel T3 simultaneously; Node C sends protection switching request message on link protection tunnel T2, sends protection switching request message on Node Protection tunnel T3 simultaneously;
Node A, node C receive respectively the protection switching request message that the other side (node C, node A) sends on Node Protection tunnel T3, and this locality detects A-B, C-B side corresponding failure, select Node Protection tunnel T3 to carry out the protection of this sidelinks and switch, and switch response message by Node Protection tunnel T3 transmission protection;
Node A, node C receive respectively the response message of switching that the other side (node C, node A) sends on Node Protection tunnel T3, have all carried out Node Protection and have switched, attonity.
The embodiment of the present invention 12 is at node A during to Node B fault between node C; node A and node C send respectively protection switching request message on link protection tunnel and Node Protection tunnel; the peer node in Node Protection tunnel (node C and node A) receives protection switching request message on Node Protection tunnel; switch the business to Node Protection tunnel, can normal transmission with assurance business.
It should be noted that; the OAM(Operation that response message can be used digital plane is switched in protection switching request message in the embodiment of the present invention and protection; administration and maintenance; operation management maintain) message; but be not limited to use this message; also can use the protocol massages of control plane, or other messages, realization of the present invention do not affected.
Embodiment 13:
Consult Fig. 6, the embodiment of the present invention 13 provides a kind of network node, comprising:
Receiving element 601, for receiving looped network protection switching request message, carries source, the destination node information of described looped network protection switching request message in described looped network protection switching request message;
Protection tunnel selected cell 602, be used for according to described source, destination node information, determine the abort situation of looped network, according to the abort situation of determined looped network, select protection tunnel, wherein, selected protection tunnel is the link protection tunnel of link between described source node and described network node, or the Node Protection tunnel of intermediate node on minor axis between described source node and described network node;
Switch unit 603, for switching the business to selected protection tunnel.
Concrete, described protection tunnel selected cell 602, for when described network node is destination node, determines the link failure between described network node and source node; Select the link protection tunnel of link between described network node and source node; When described network node is not destination node, and described network node detected when the minor axis side of itself and described source node has fault, determine the intermediate node fault on minor axis between network node and source node; Select the Node Protection tunnel of described intermediate node.
This network node also comprises: unit 604 is set up in tunnel, for setting up the link protection tunnel of link between source node and described network node, or sets up the Node Protection tunnel of the intermediate node on minor axis between source node and network node.
The embodiment of the present invention 13 receives after looped network protection switching request message at network node; according to the protection switching request message receiving, determine the abort situation of looped network; (selected protection tunnel is the link protection tunnel of link between this network node and source node according to the abort situation of this looped network, to select protection tunnel; or the Node Protection tunnel of intermediate node on minor axis between this network node and source node), switching the business to selected protection tunnel can normal transmission with assurance business.
Embodiment 14:
Consult Fig. 7, the embodiment of the present invention 14 provides a kind of network node, comprising:
Transmitting element 703, for sending protection switching request message on selected protection tunnel.
Concrete, described selected cell 701, for detection of the link protection tunnel of link between described network node and Section Point fault whether, if not, selects the link protection tunnel of link between described network node and Section Point; If so, and during the Node Protection tunnel fault-free of described Section Point, select the Node Protection tunnel of described Section Point.
This network node also comprises:
In the embodiment of the present invention 14, this network node is selected protection tunnel according to the malfunction in the protection tunnel of setting up in advance; and the other end that makes to protect tunnel by send protection switching request message on selected protection tunnel knows and should switch the business to this protection tunnel, can normal transmission with assurance business.
Embodiment 15:
Consult Fig. 8, the embodiment of the present invention 15 provides a kind of network node, comprising:
Transmitting element 801, for sending respectively protection switching request message on the Node Protection tunnel of the link protection tunnel at link between network node and Section Point and Section Point;
Receiving element 802, switches response message for receiving to be responsible to replace on the Node Protection tunnel of the link protection tunnel at link between network node and Section Point or Section Point;
This network node also comprises: unit 804 is set up in tunnel, for setting up the link protection tunnel of link between described network node and described Section Point, sets up the Node Protection tunnel of described Section Point.
The network node that the embodiment of the present invention 15 provides sends respectively protection switching request message on two protection tunnels, switches the business to receive to protect to switch on the protection tunnel of response message, can normal transmission with assurance business.
Embodiment 16:
The embodiment of the present invention 16 provides a kind of loop network, comprising:
Node one, for detection of to network failure, sends looped network protection switching request message, source, the destination node information of in described protection switching request message, carrying described looped network protection switching request message to node two;
Node two; be used for according to described source, destination node information; determine the abort situation of looped network; according to the abort situation of determined looped network; select protection tunnel; switch the business to selected protection tunnel, selected protection tunnel is the link protection tunnel of described node two and a link of node, or the Node Protection tunnel of the intermediate node on described node two and minor axis of node.
Node two in the loop network that the embodiment of the present invention 16 provides receives after looped network protection switching request message; according to this looped network protection switching request message, determine the abort situation of looped network; according to the abort situation of looped network, select protection tunnel; switch the business on selected protection tunnel, can normal transmission with assurance business.
Embodiment 17:
The embodiment of the present invention 17 provides a kind of loop network, comprising: first node, Section Point and the 3rd node, and wherein, described Section Point is adjacent with the 3rd node with first node respectively,
First node, the failure condition in the protection tunnel of setting up in advance for basis, select protection tunnel, switch the business to selected protection tunnel, and on selected protection tunnel, sending protection switching request message, selected protection tunnel is the link protection tunnel of link between first node and Section Point or the Node Protection tunnel of Section Point;
Section Point, if for receiving described protection switching request message on the link protection tunnel at link between first node and Section Point, switch the business to the link protection tunnel of link between first node and Section Point;
The 3rd node, if for receiving described protection switching request message on the Node Protection tunnel at Section Point, switch the business to the Node Protection tunnel of described Section Point.
First node in the loop network that the embodiment of the present invention 17 provides is selected protection tunnel according to the malfunction in the protection tunnel of setting up in advance; and the other end that makes to protect tunnel by send protection switching request message on selected protection tunnel knows and should switch the business to this protection tunnel, can normal transmission with assurance business.
Embodiment 18:
The embodiment of the present invention 18 provides a kind of loop network, comprising: first node, Section Point and the 3rd node, and wherein, described Section Point is adjacent with the 3rd node with first node respectively,
First node, for sending respectively protection switching request message on the Node Protection tunnel of the link protection tunnel at link between first node and Section Point and Section Point; On the link protection tunnel of link between first node and Section Point or the Node Protection tunnel of Section Point, receive to be responsible to replace and switch response message, switch the business to and receive described protection and switch on the protection tunnel of response message;
Section Point, if for receive protection switching request message on the link protection tunnel of link between first node and Section Point, switch the business to the link protection tunnel of link between described first node and Section Point, and response message is switched in transmission protection on the link protection tunnel of link between first node and Section Point;
The 3rd node; if for receive protection switching request message on the Node Protection tunnel of Section Point; and described end points detected and have fault at itself and first node minor axis side; switch the business to the Node Protection tunnel of described Section Point, on the Node Protection tunnel of described Section Point, send to be responsible to replace and switch response message.
First node in the loop network that the embodiment of the present invention 18 provides sends respectively protection switching request message on two protection tunnels, switches the business to receive to protect to switch on the protection tunnel of response message, can normal transmission with assurance business.
One of ordinary skill in the art will appreciate that all or part of step realizing in above-described embodiment method is to come the hardware that instruction is relevant to complete by program, described program can be stored in a kind of computer-readable recording medium, read-only memory for example, disk or CD etc.
The ring net protection method above embodiment of the present invention being provided, network node and loop network are described in detail, applied specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof; , for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention meanwhile.
Claims (13)
1. a ring net protection method, is characterized in that, comprising:
When looped network breaks down; first node is according to the failure condition in the protection tunnel of setting up in advance; select protection tunnel; switch the business to selected protection tunnel; and on selected protection tunnel, send protection switching request message, notify the other end node in selected protection tunnel to switch the business to selected protection tunnel.
2. method according to claim 1, is characterized in that,
Described first node, according to the failure condition in the protection tunnel of setting up in advance, selects protection tunnel to comprise:
Between described first node detection first node and Section Point, whether fault if not, is selected the link protection tunnel of link between described first node and Section Point in the link protection tunnel of link; If so, and during the Node Protection tunnel fault-free of described Section Point, select the Node Protection tunnel of described Section Point.
3. according to claim 1 or claim 2, it is characterized in that,
For each node on described looped network, set up Node Protection tunnel, described Node Protection tunnel connects respectively the adjacent node of protected node;
With, be every link establishment link protection tunnel on described looped network, described link protection tunnel connects respectively two end points of described link.
4. a ring net protection method, is characterized in that, comprising:
When looped network breaks down, first node sends respectively protection switching request message on the link protection tunnel of link between first node and Section Point and the Node Protection tunnel of Section Point;
On the link protection tunnel of link between first node and Section Point or the Node Protection tunnel of Section Point, receive to be responsible to replace and switch response message;
Switch the business to and receive described protection and switch on the protection tunnel of response message.
5. method according to claim 4, is characterized in that, the method also comprises:
If Section Point receives protection switching request message on the link protection tunnel of link between described first node and Section Point, switch the business to the link protection tunnel of link between described first node and Section Point, and on the link protection tunnel of link between described first node and Section Point, send to be responsible to replace and switch response message;
If the end points in the Node Protection tunnel of Section Point receives protection switching request message; and described end points detected and have fault at itself and first node minor axis side; switch the business to the Node Protection tunnel of described Section Point, on the Node Protection tunnel of described Section Point, send to be responsible to replace and switch response message.
6. according to the method described in claim 4 or 5, it is characterized in that,
For each node on described looped network, set up Node Protection tunnel, described Node Protection tunnel connects respectively the adjacent node of protected node;
With, be every link establishment link protection tunnel on described looped network, described link protection tunnel connects respectively two end points of described link.
7. a network node, described network node is arranged in loop network, it is characterized in that, comprising:
Selected cell, for according to the failure condition in the protection tunnel of setting up in advance, selects protection tunnel;
Switch unit, for switching the business to selected protection tunnel;
Transmitting element, for sending protection switching request message on selected protection tunnel.
8. network node according to claim 7, is characterized in that,
Described selected cell, for detection of the link protection tunnel of link between described network node and Section Point fault whether, if not, selects the link protection tunnel of link between described network node and Section Point; If so, and during the Node Protection tunnel fault-free of described Section Point, select the Node Protection tunnel of described Section Point.
9. according to the network node described in claim 7 or 8, it is characterized in that, also comprise:
Unit is set up in tunnel, for setting up the link protection tunnel of link between described network node and described Section Point, sets up the Node Protection tunnel of described Section Point.
10. a network node, is characterized in that, comprising:
Transmitting element, for sending respectively protection switching request message on the Node Protection tunnel of the link protection tunnel at link between network node and Section Point and Section Point;
Receiving element, switches response message for receiving to be responsible to replace on the Node Protection tunnel of the link protection tunnel at link between network node and Section Point or Section Point;
Switch unit, receives for switching the business to the protection tunnel that response message is switched in described protection.
11. network nodes according to claim 10, is characterized in that, also comprise:
Unit is set up in tunnel, for setting up the link protection tunnel of link between described network node and described Section Point, sets up the Node Protection tunnel of described Section Point.
12. 1 kinds of loop network, is characterized in that, comprising: first node, Section Point and the 3rd node, and wherein, described Section Point is adjacent with the 3rd node with first node respectively,
First node, the failure condition in the protection tunnel of setting up in advance for basis, select protection tunnel, switch the business to selected protection tunnel, and on selected protection tunnel, sending protection switching request message, selected protection tunnel is the link protection tunnel of link between first node and Section Point or the Node Protection tunnel of Section Point;
Section Point, if for receiving described protection switching request message on the link protection tunnel at link between first node and Section Point, switch the business to the link protection tunnel of link between first node and Section Point;
The 3rd node, if for receiving described protection switching request message on the Node Protection tunnel at Section Point, switch the business to the Node Protection tunnel of described Section Point.
13. 1 kinds of loop network, is characterized in that, comprising: first node, Section Point and the 3rd node, and wherein, described Section Point is adjacent with the 3rd node with first node respectively,
First node, for sending respectively protection switching request message on the Node Protection tunnel of the link protection tunnel at link between first node and Section Point and Section Point; On the link protection tunnel of link between first node and Section Point or the Node Protection tunnel of Section Point, receive to be responsible to replace and switch response message, switch the business to and receive described protection and switch on the protection tunnel of response message;
Section Point, if for receive protection switching request message on the link protection tunnel of link between first node and Section Point, switch the business to the link protection tunnel of link between described first node and Section Point, and response message is switched in transmission protection on the link protection tunnel of link between first node and Section Point;
The 3rd node; if for receive protection switching request message on the Node Protection tunnel of Section Point; and described end points detected and have fault at itself and first node minor axis side; switch the business to the Node Protection tunnel of described Section Point, on the Node Protection tunnel of described Section Point, send to be responsible to replace and switch response message.
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| CN201310659484.6A CN103701677B (en) | 2009-04-29 | 2009-04-29 | Ring net protection method, network node and loop network |
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| CN200910136240.3A CN101877665B (en) | 2009-04-29 | 2009-04-29 | Ring network protecting method, network node and ring network |
| CN201310659484.6A CN103701677B (en) | 2009-04-29 | 2009-04-29 | Ring net protection method, network node and loop network |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111865404A (en) * | 2020-06-09 | 2020-10-30 | 烽火通信科技股份有限公司 | Protection ring path searching method, device, equipment and readable storage medium |
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| CN111865404A (en) * | 2020-06-09 | 2020-10-30 | 烽火通信科技股份有限公司 | Protection ring path searching method, device, equipment and readable storage medium |
| CN111865404B (en) * | 2020-06-09 | 2021-05-14 | 烽火通信科技股份有限公司 | Protection ring path searching method, device, equipment and readable storage medium |
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