WO2016086548A1 - Système, procédé et dispositif de commutation de protection de pseudo-fil en double anneau - Google Patents

Système, procédé et dispositif de commutation de protection de pseudo-fil en double anneau Download PDF

Info

Publication number
WO2016086548A1
WO2016086548A1 PCT/CN2015/074617 CN2015074617W WO2016086548A1 WO 2016086548 A1 WO2016086548 A1 WO 2016086548A1 CN 2015074617 W CN2015074617 W CN 2015074617W WO 2016086548 A1 WO2016086548 A1 WO 2016086548A1
Authority
WO
WIPO (PCT)
Prior art keywords
node
traffic
dni
working
side source
Prior art date
Application number
PCT/CN2015/074617
Other languages
English (en)
Chinese (zh)
Inventor
刘小飞
席媛媛
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2016086548A1 publication Critical patent/WO2016086548A1/fr

Links

Images

Definitions

  • the present invention relates to the field of multi-protocol label switching (MPLS) communication technology, and in particular, to a pseudo-line dual-homing protection switching system, method and device.
  • MPLS multi-protocol label switching
  • the Dual Node Interconnection Pseudo Wire is mainly applicable to the pseudo-line dual-homing protection scenario.
  • the main principle is to form a single-point protection between the dual-homed nodes, DNI PW.
  • a typical scenario of dual-homing protection is shown in Figure 1.
  • PE2 and PE3 are dual-homed nodes, PE2 is the primary node, and PE3 is the standby node. Both PE2 and PE3 are implemented by the aggregation layer device.
  • PE1 is the network-side source node.
  • the access layer device is implemented;
  • PE4 is a user-side source node, which is implemented by the core layer device;
  • a DNI PW is set between the dual-homing node PE2 and PE3, and the basic structure and functions of each part are as follows:
  • a PW protection group is configured between PE1 and PE2, and between PE1 and PE3.
  • the PW protection group includes the working PW between PE1 and PE2, and PE1 and PE3. Protection between PW;
  • MC-APS Multi-Chassis Automatic Protection Switched
  • the DNI PW is used to forward traffic between the dual-homed nodes PE2 and PE3, and the two-node interconnection is implemented by PE2 and PE3.
  • the DNI PW needs to control the switching of the traffic on the NNI side and the traffic switching on the UNI side. It is usually difficult to ensure that packet loss does not occur in the protection switching in the DNI scenario. Therefore, it is difficult to achieve the 50ms carrier-class protection switching standard.
  • Scenario 1 When the APS on the UNI side detects the link fault fast protection switch, the peer cross-device node PE3 cannot detect that the working AC is faulty in time and cannot perform the switch for the working AC fault in time. Therefore, it is difficult to guarantee Fast switching leads to packet loss.
  • Scenario 2 When the APS detects the link fault fast protection switchover on the NNI side, the PE3 cannot detect the fault of the working PW in time and cannot perform the switch for the working PW fault in time. It is also difficult to ensure fast switching and result in packet loss. flow.
  • Scenario 3 When the active node is powered off and restarted, the standby node needs to control the protection switching of the traffic on the NNI side and the UNI side at the same time. It is difficult to ensure that the fast switching causes packet loss.
  • embodiments of the present invention are expected to provide a pseudowire dual return protection switching system, method and apparatus.
  • An embodiment of the present invention provides a pseudowire dual-homing protection switching system, where the system includes: an active node, a standby node, a network side source node, and a user side source node; wherein the primary node and the network side source node A work pseudowire PW is provided between the standby node and the network side source node. A protection PW is disposed between the active node and the user-side source node, and a protection AC is disposed between the standby node and the user-side source node; the primary node and the standby node are provided. A first two-node interconnected pseudowire DNI PW and a second DNI PW are disposed therebetween; wherein
  • the first DNI PW is configured to protect the working AC on the active node, and carry the traffic from the source node of the network side; and configure the protection PW on the standby node to carry the traffic from the source node of the user side;
  • the second DNI PW is configured to protect the working PW on the active node and carry the traffic from the user-side source node.
  • the configuration is to protect the protected AC on the standby node and carry the traffic from the source node of the network.
  • the active node is configured to forward the traffic from the first DNI PW to the network side source node according to the working state of the working PW, and further configured to forward the traffic coming from the second DNI PW to the working AC through the working AC.
  • User side source node
  • the standby node is configured to forward the traffic from the first DNI PW to the user-side source node through the protection AC, and configured to send the traffic coming from the second DNI PW to the network-side source node through the protection PW.
  • the active node is configured to forward the traffic coming from the first DNI PW to the network side source node through the working PW when the working PW is faultless;
  • the traffic received on the first DNI PW is quickly switched to the second DNI PW and sent to the standby node, and forwarded to the network side source node through the standby node.
  • the system is also configured with pseudowire automatic protection switching PW APS and pseudowire automatic protection switching across the rack MC-PW APS for network side dual return protection, and link aggregation/linear multiplex section protection (LAG/MSP) Link aggregation/linear multiplex section protection (MC-LAG/MSP) across the rack is used for user side link protection.
  • pseudowire automatic protection switching PW APS and pseudowire automatic protection switching across the rack MC-PW APS for network side dual return protection
  • LAG/MSP link aggregation/linear multiplex section protection
  • MC-LAG/MSP Link aggregation/linear multiplex section protection across the rack is used for user side link protection.
  • the PW APS is configured to implement the switching of the traffic from the working PW to the protection PW on the network side source node when the working PW fails, and the MC-PW APS is simultaneously configured to implement when the working PW fails.
  • the LAG/MSP is configured to switch the working state of the user-side source node to receive and send traffic through the protection AC when the working AC fails.
  • the MC-PW APS is configured to implement the active node when the working AC fails. Switch to the standby node.
  • the traffic is sent from the network side source node to the user side source node through the working PW, and when the traffic reaches the active node, it is sent to the user side source node via the working AC, and simultaneously through the first
  • the DNI PW and the protection AC are sent to the user side source node; the user side source node selects one of the working AC and the protection AC according to the current working state to receive the traffic;
  • the primary node receives the traffic sent by the working AC, and the standby node sends the traffic sent by the protection AC to the active node via the first DNI PW.
  • the active node selects to receive the traffic sent by the working AC and blocks the traffic sent by the first DNI PW.
  • the embodiment of the present invention provides a method for switching a pseudo-line dual-homing protection.
  • the network-side source node sends traffic to the user-side device through the working pseudowire PW or the protection PW, and the user-side device transmits the traffic to the network through the working aggregation link AC and the protection AC respectively.
  • the side device sends the traffic; the method further includes:
  • the active node protects the working AC through the first dual node interconnected pseudowire DNI PW and carries the traffic coming from the network side source node; the standby node protects the AC through the second DNI PW protection. And carrying the traffic coming from the source node of the network side;
  • the active node protects the working PW through the second DNI PW and carries the traffic from the user-side source node; the standby node protects the PW through the first DNI PW and carries the user side. The traffic coming from the source node.
  • the primary node protects the working AC by using the first DNI PW
  • the method includes: the primary node sends the traffic to the standby node by using the first DNI PW;
  • the primary node protects the working PW by using the second DNI PW, including: the primary node sends the traffic to the standby node by using the second DNI PW;
  • the standby node protects the AC by using a second DNI PW protection, including: the standby node will The traffic is sent to the active node through the second DNI PW;
  • the standby node protects the PW by the first DNI PW protection, including: the standby node sends the traffic to the active node through the first DNI PW.
  • the standby node when the primary node sends the traffic to the standby node through the first DNI PW, the standby node sends the traffic coming from the first DNI PW to the network side source node through the protection PW;
  • the standby node When the primary node sends the traffic to the standby node through the second DNI PW, the standby node sends the traffic coming from the second DNI PW to the network side source node through the protection PW;
  • the primary node forwards the traffic coming from the second DNI PW to the user side source node through the working AC;
  • the primary node forwards the traffic to the network side source node according to the working state of the working PW.
  • the active node forwards the traffic to the network side source node according to the working state of the working PW, including:
  • the active node forwards the traffic coming from the first DNI PW to the network side source node through the working PW;
  • the active node quickly switches the traffic received on the first DNI PW to the second DNI PW and sends the traffic to the standby node, and forwards the packet to the network side source node through the standby node.
  • An embodiment of the present invention provides a pseudowire dual-homing protection switching method, where the method includes:
  • the active node protects the working aggregation link AC through the first dual node interconnection pseudowire DNI PW, and carries the traffic coming from the network side source node;
  • the active node protects the working pseudowire PW through the second DNI PW and carries the traffic coming from the user side source node.
  • the primary node protects the working AC by using the first DNI PW
  • the method includes: the primary node sends the traffic to the standby node by using the first DNI PW;
  • the primary node protects the working PW through the second DNI PW, including: the primary node sends the traffic to the standby node through the second DNI PW.
  • the method further includes: when the primary node receives the traffic sent by the standby node through the second DNI PW, forwarding the traffic coming from the second DNI PW to the user side source node by using the working AC; the primary node receiving the standby node When the traffic sent by the first DNI PW is forwarded, the traffic is forwarded to the network side source node according to the working state of the working PW.
  • the active node forwards the traffic to the network side source node according to the working state of the working PW, including:
  • the active node forwards the traffic coming from the first DNI PW to the network side source node through the working PW;
  • the active node quickly switches the traffic received on the first DNI PW to the second DNI PW and sends the traffic to the standby node, and forwards the packet to the network side source node through the standby node.
  • the embodiment of the present invention provides a pseudo-line dual-homing protection switching device, which is located on a primary node, and includes: a first dual-node interconnected pseudowire DNI PW and a second DNI PW;
  • the first DNI PW is configured to protect the working aggregation link AC and carry the traffic from the network side source node when the network side source node sends the traffic to the user side source node;
  • the second DNI PW is configured to protect the working pseudowire PW and carry the traffic from the user side source node when the user side source node sends the traffic to the network side source node.
  • the first DNI PW protects the working AC by:
  • the second DNI PW protects the working PW by:
  • the device further includes: a first traffic forwarding module configured to: when the primary node receives the traffic sent by the standby node through the second DNI PW, forward the traffic from the second DNI PW to the working AC through the working AC to User side source node; also configured to receive the standby at the primary node When the traffic sent by the node through the first DNI PW is used, the traffic is forwarded to the network side source node according to the working state of the working PW.
  • a first traffic forwarding module configured to: when the primary node receives the traffic sent by the standby node through the second DNI PW, forward the traffic from the second DNI PW to the working AC through the working AC to User side source node; also configured to receive the standby at the primary node When the traffic sent by the node through the first DNI PW is used, the traffic is forwarded to the network side source node according to the working state of the working PW.
  • the device further includes a determining module configured to determine a current working state of the working PW, where the working state includes: fault and no fault;
  • the first traffic forwarding module is configured to forward the traffic coming from the first DNI PW to the network side source node through the working PW when the working PW is faultless;
  • the traffic received on the first DNI PW is quickly switched to the second DNI PW and sent to the standby node, and forwarded to the network side source node through the standby node.
  • An embodiment of the present invention provides a pseudowire dual-homing protection switching method, where the method includes:
  • the standby node protects the aggregation link AC through the second dual node interconnection pseudowire DNI PW, and carries the traffic coming from the network side source node;
  • the standby node protects the pseudo-wire PW through the first DNI PW and carries the traffic from the user-side source node.
  • the standby node protects the PW by using the first DNI PW protection, including: the standby node sends the traffic to the active node by using the first DNI PW;
  • the standby node protects the AC through the second DNI PW protection, including: the standby node sends the traffic to the active node through the second DNI PW.
  • the standby node when the standby node receives the traffic sent by the primary node through the first DNI PW, the traffic sent by the first DNI PW is sent to the network side source node through the protection PW;
  • the standby node When receiving the traffic sent by the primary node through the second DNI PW, the standby node sends the traffic coming from the second DNI PW to the network side source node through the protection PW.
  • the embodiment of the present invention provides a pseudo-line dual-homing protection switching device, which is located at a standby node, where the device includes: a third dual-node interconnected pseudowire DNI PW and a fourth DNI PW;
  • the third DNI PW is configured to protect the protection pseudowire PW and carry the traffic from the user side source node when the user side source node sends the traffic to the network side source node;
  • the fourth DNI PW is configured to send, when the network side source node sends traffic to the user side source node, Protection protects the aggregated link AC and carries traffic from the network side source node.
  • the third DNI PW protects the protection PW by:
  • the fourth DNI PW protects the protection AC by:
  • the device further includes: a second traffic forwarding module, configured to send the traffic coming from the third DNI PW to the network side through the protection PW when receiving the traffic sent by the primary node through the third DNI PW
  • the source node is configured to send the traffic from the fourth DNI PW to the network side source node through the protection PW when receiving the traffic sent by the primary node through the fourth DNI PW.
  • Embodiments of the present invention also provide a computer storage medium, the storage medium comprising a set of computer executable instructions for performing a pseudowire dual return protection switching method of an active node.
  • Embodiments of the present invention also provide a computer storage medium, the storage medium comprising a set of computer executable instructions for performing a pseudowire dual return protection switching method of a standby node.
  • a pseudo-line dual-homing protection switching system, method, and apparatus provided by the embodiments of the present invention, wherein the pseudo-line dual-homing protection switching system includes: an active node, a standby node, a network side source node, and a user side source a node; a working pseudowire PW is disposed between the active node and the network side source node; a protection PW is disposed between the standby node and the network side source node; and the primary node and the user side source node are A working aggregation link AC is disposed between the standby node and the user side source node; a first dual node interconnected pseudowire DNI PW and a second DNI are disposed between the primary node and the standby node; The first DNI PW is configured to protect the working AC on the active node, and carry the traffic from the source node of the network side; and configure the protection PW on the standby node to carry the user-side source node.
  • the second DNI PW is configured to protect the working PW on the active node and carry the traffic from the user-side source node.
  • the configuration is also configured to protect the protected AC on the standby node and carry the network-side source node. Traffic. So, in the Lord Two DNI PWs are simultaneously set between the node and the standby node, one DNI PW forms a protection group with the working AC and the protection PW, the other DNI PW forms a protection group with the working PW and the protection AC, and the first DNI PW and the second Cross-protection is formed between the DNI PWs.
  • This structure makes up for the shortcomings of the prior art, and avoids packet loss and interruption caused by the link switch not being implemented in time on the standby node when a fault occurs on the user side and/or the network side. Streaming, and can reach the 50ms carrier-class protection switching standard.
  • FIG. 1 is a structural diagram of a DNI PW dual-homing protection scenario in the prior art
  • FIG. 2 is a basic structural diagram of a pseudowire dual-homing protection switching system according to an embodiment of the present invention
  • FIG. 3 is an exemplary structural diagram of a pseudowire dual-homing protection switching system according to an embodiment of the present invention.
  • FIG. 5 is a basic flowchart 2 of a pseudowire dual-homing protection switching method according to an embodiment of the present invention
  • FIG. 6 is a structural diagram 1 of a pseudowire dual-homing protection switching apparatus according to an embodiment of the present invention.
  • FIG. 7 is a basic flowchart 3 of a pseudowire dual-homing protection switching method according to an embodiment of the present invention.
  • FIG. 8 is a structural diagram 2 of a pseudo-line dual-homing protection switching apparatus according to an embodiment of the present invention.
  • the pseudowire dual-homing protection switching system includes: an active node, a standby node, a network side source node, and a user side source node; wherein the primary node and the network side source node are disposed between a working pseudowire (PW); a protection PW is disposed between the standby node and the network side source node; a working aggregation link (AC) is disposed between the primary node and the user side source node; A protection AC is disposed between the user side source nodes; a first dual node interconnected pseudowire (DNI PW) and a second DNI PW are disposed between the active node and the standby node; wherein the first DNI PW is configured To protect the working AC on the active node, the traffic from the source node of the network is carried.
  • PW working pseudowire
  • AC working aggregation link
  • the protection is also protected on the standby node.
  • the second DNI PW is configured to protect the working PW on the active node and carry the traffic from the user-side source node.
  • the configuration is to protect the AC on the standby node and carry the traffic from the source node of the network.
  • the first embodiment of the present invention provides a pseudo-line dual-homing protection switching system. As shown in FIG. 2, the system includes: a primary node 21, a standby node 22, a network-side source node 23, and a user-side source node 24;
  • a working PW is disposed between the primary node 21 and the network side source node 23;
  • a protection PW is disposed between the standby node 22 and the network side source node 23;
  • a working AC is disposed between the primary node 21 and the user-side source node 24;
  • a protection AC is disposed between the standby node 22 and the user-side source node 24;
  • the user-side traffic is simultaneously sent to the network side through the working AC and the protection AC, and for the traffic coming from the network side, the user-side source node 24 is based on the current working AC and Protect the working status of the protection group formed by the AC, and select the traffic that receives the working AC or protects the AC, and blocks the traffic of another link.
  • the network side source node 23 Based on the working mechanism of the network side source node 23, the network side source node 23 sends traffic to the user side source node 24 through the working PW or the protection PW, and receives the user side source through the working PW or the protection PW for sending traffic. The traffic sent by node 24.
  • the first DNI PW and the second DNI PW are disposed between the primary node 21 and the standby node 22;
  • the first DNI PW is configured to protect the working AC on the active node 21 and carry the traffic from the network side source node 23; and is configured to protect the PW on the standby node 22 and carry the user-side source node 23
  • the second DNI PW is configured to protect the working PW on the active node 21 and carry the traffic from the user-side source node 24; and is configured to protect the protected AC on the standby node 22, and the bearer network side source node 24 comes over. Traffic.
  • the pseudowire double A plurality of protection groups are formed in the protection switching system; from the network side to the user side, the working PW and the protection PW are mutually pseudo-line dual-homing protection groups, and the pseudo-line across the rack is formed between the working AC and the first DNI PW.
  • the dual-homing protection group, the second DNI PW, and the protection AC form a pseudo-line dual-homing protection group across the rack; from the user side to the network side, the working AC and the protection AC are the link protection group, the working PW, and the second DNI PW.
  • a pseudo-line dual-homing protection group, a first DNI PW, and a protection PW forming a cross-rack form a pseudo-line dual-homing protection group across the rack.
  • the active node 21 is configured to forward the traffic from the first DNI PW to the network side source node 23 according to the working state of the working PW, and is further configured to forward the traffic coming from the second DNI PW to the user side through the working AC.
  • the source node 24 is configured to forward the traffic from the first DNI PW to the user-side source node 24 through the protection AC, and configured to send the traffic coming from the second DNI PW to the network side through the protection PW.
  • Source node 23 It can be seen that the forwarding direction of the traffic coming from the first DNI PW or the second DNI PW on the primary node 21 or the standby node 22 is determined;
  • the working states of the working PW include: fault and no fault.
  • the active node 21 is configured to forward the traffic coming from the first DNI PW to the network side source node through the working PW when the working PW is faultless; or
  • the traffic received on the first DNI PW is quickly switched to the second DNI PW and sent to the standby node, and forwarded to the network side source node through the standby node.
  • the working state of the network side source node 23 defaults to receiving traffic and sending traffic through the working PW
  • the working state of the user side source node 24 defaults to sending traffic simultaneously through the working AC and the protection AC. Receiving traffic through the working AC and blocking the traffic that protects the AC;
  • the active node When the traffic is simultaneously sent from the user-side source node 24 to the network-side source node 23 via the working AC and the protection AC, at this time, since the working state of the network-side source node 23 is to receive the user-side traffic through the working PW, the active node is used.
  • the receiving node 22 receives the traffic sent by the working AC, and the standby node 22 sends the traffic sent by the protection AC to the active node 21 via the first DNI PW, and the active node 21 determines the traffic sent by the working AC according to the current working state of the user-side source node 24. And block the traffic sent by the first DNI PW.
  • the pseudowire dual-homing protection switching system is configured with PW APS and MC-PW APS for network-side dual-homing protection; and the PW APS is used to implement traffic from the network-side source node 23 from the working PW when the working PW fails.
  • the MC-PW APS is simultaneously used to implement the handover of the primary node 21 to the standby node 22 when the working PW fails, that is, the network side that originally transmits the working PW through the primary node 21
  • the traffic is switched to receive the network side traffic sent by the protection PW through the standby node 22;
  • the pseudowire dual-homing protection switching system is configured with link aggregation/linear multiplex section protection (LAG/MSP, Link Aggregation/Linear Multipex Section Protection) and cross-rack link aggregation/linear multiplex section protection (MC- LAG/LMSP) is used for user side link protection;
  • LAG/MSP Link Aggregation/Linear Multipex Section Protection
  • MC- LAG/LMSP cross-rack link aggregation/linear multiplex section protection
  • the APS is simultaneously used to switch the primary node 21 to the standby node 22 when the working AC fails, that is, to switch the user-side traffic originally transmitted by the primary node 21 to the working AC to receive the protection AC through the primary node 21.
  • User-side traffic sent is simultaneously used to switch the primary node 21 to the standby node 22 when the working AC fails, that is, to switch the user-side traffic originally transmitted by the primary node 21 to the working AC to receive the protection AC through the primary node 21.
  • the first DNI PW and the second DNI PW directly form cross protection on the cross-rack devices (the primary node 21 and the standby node 22) in the pseudowire dual-homing protection system, and the respective division of labor is clear,
  • the forwarding direction of the traffic sent by the primary node 21 or the standby node 22 to the first DNI PW and the second DNI PW is also fixed;
  • the user side source node 24 quickly perceives the fault, and The current working state is switched to receive and send traffic through the protection AC; the standby node 22 receives the traffic from the protection AC, and selects to receive the traffic from the protection AC according to the working state of the working AC, and passes the traffic through the first DNI PW.
  • the primary node 21 receives the traffic from the first DNI PW, and sends the traffic to the network side source node 23 directly through the working PW according to the preset traffic forwarding direction; and from the network side to the user side, the primary node
  • the node 21 receives the traffic coming from the working PW
  • the traffic is sent to the standby node 22 through the first DNI PW, and the standby node 22 directly passes the traffic sent from the first DNI PW according to the preset traffic forwarding direction to protect the AC.
  • the standby node 22 in the cross-rack device realizes the fast flow according to the preset forwarding direction before sensing the user-side fault and performing the handover. Forward correctly, preventing packet loss;
  • the network side source node 23 quickly senses the fault and sends the network side traffic through the protection PW.
  • the standby node 22 receives the traffic from the protection PW, according to the working state of the current working PW, the traffic is used.
  • the second DNI PW and the protection AC are respectively sent to the user-side source node 24.
  • the primary node 21 receives the traffic from the second DNI PW, the primary node 21 also forwards the traffic to the user-side source through the working AC according to the preset forwarding direction. From the user side to the network side, the user-side source node 24 sends traffic to the network-side source node 23 through the working AC and the protection AC, respectively.
  • the primary node 21 After receiving the traffic sent by the working AC, the primary node 21 senses the working PW. Failure, therefore, the traffic is sent to the standby node 22 through the second DNI PW, whereby the standby node 22 receives the second DNI PW and protects the two traffic sent by the AC, and selects the reception according to the working state of the current working AC. The traffic sent by one link and the other link is blocked. It can be seen that when the network side working PW fails, the solution provided according to the embodiment of the present invention is set across the rack. A spare node 22 prior to the perceived failure and the user side performs switching has been achieved in accordance with the original direction of forwarding traffic forwarded correctly and quickly, preventing the occurrence of packet loss;
  • the user-side source node 24 sends the traffic to the standby node 22 by protecting the AC, and the standby node 22 cannot timely sense that the working PW is faulty and performs The line is switched. Therefore, the traffic is still sent to the active node 21 through the first DNI PW.
  • the primary node 21 receives the traffic sent by the standby node 22, the primary node 21 senses that the working PW is faulty.
  • the node 21 quickly switches the traffic received on the first DNI PW to the second DNI PW and sends it to the standby node 22; afterwards, the standby node 22 directly directly traffices the second DNI PW according to the preset forwarding direction.
  • the network side source node 23 sends the traffic to the standby node 22 through the protection PW, and the standby node 22 passes the traffic through the protection AC and the second DNI PW according to the working state of the current working PW.
  • the traffic is forwarded to the user-side source node 24, and therefore, the traffic from the network side to the user side is not lost.
  • FIG. 3 is an exemplary structural diagram of a pseudo-line dual-homing protection switching system according to an embodiment of the present invention
  • PE1 is a network-side source node
  • PE2 is a primary node
  • PE3 is a standby node
  • PE4 is a user-side source node.
  • Link 1 and 2 are the input and output links of PE1; links 3 and 4 are working PW and protection PW respectively; links 5 and 6 are two DNI PWs set between PE2 and PE3, among them, chain Road 5 is DNI PW1, link 6 is DNI PW2; links 7 and 8 are working AC and protection AC respectively; links 9 and 10 are output links and input links on PE4, respectively;
  • Step S401 When all links work normally and no faults, the PE1 and PE2 node pseudowire protection work in the main, that is, PE1 sends traffic through the working PW (link 3), and PE2 selects the traffic sent by the receiving link 3; the PE4 node
  • the MSP protection works at the primary, that is, PE4 chooses to receive the traffic sent by the working AC (link 7).
  • the primary selection receives traffic (a); the UNI side to the NNI side traffic also has two flows: (a) link 10 ⁇ link 7 ⁇ link 3 ⁇ link 2, (b) link 10 ⁇ Link 8 ⁇ Link 5 ⁇ Link 3 ⁇ Link 2, the PE2 node selects the traffic (a) according to the current working state, and blocks the traffic coming through the link 5.
  • step S402 When the network side link 3 fails, go to step S402; when the user side link 7 fails, go to step S403; when the user side link 8 fails, go to step S404; when the DNI master node PE2 loses power Then go to step S409;
  • Step S402 In the case that the link 3 on the NNI side is faulty, the PE1 and PE2 node pseudowire protection detects that the working link is faulty and quickly switches to the protection link. The UNI side does not perceive, and the PE4 node MSP protection works in the main.
  • step S401 If the network side link 3 failure disappears, go to step S401; if the user side link 7 fails, go to step S405; if the user side link 8 fails, go to step S407;
  • Step S403 When the UNI side link 7 fails, the PE4 node LMSP protection detects that the working link is faulty and quickly switches to the protection link, and the PE1 and PE2 node pseudowire protection work in the main. At this time, the traffic is forwarded. There are two traffic flows from the NNI side to the UNI side: (a) link 1 ⁇ link 3 ⁇ link 7 (fault) ⁇ link 9, (b) link 1 ⁇ link 3 ⁇ Link 5 ⁇ link 8 ⁇ link 9, PE4 works in the alternative receiving traffic (b) according to the current LMSP protection, traffic coming through link 7 is blocked due to link failure; there are also two traffic from UNI side to NNI side.
  • step S401 If the network side link 7 failure disappears, the process goes to step S401; if the user side link 3 fails, the process goes to step S406.
  • Step S404 When the UNI side link 8 fails, the PE4 node LMSP protection currently works in the main, and the detected protection link failure still works in the main, and the PE1 and PE2 node pseudowire protection work in the main.
  • the NNI side there are two traffic flows from the NNI side to the UNI side: (a) link 1 ⁇ link 3 ⁇ link 7 ⁇ link 9, (b) link 1 ⁇ link 3 ⁇ link 5 ⁇ link 8 (fault) ⁇ link 9, PE4 works according to the current MSP protection in the main selection and receiving traffic (a), traffic coming through link 8 is blocked due to link failure; UNI side to NNI side traffic due to link 8 fault has only one traffic: link 10 ⁇ link 7 ⁇ link 3 ⁇ link 2.
  • step S401 If the network side link 8 failure disappears, the process goes to step S401; if the network side link 3 fails, the process goes to step S408.
  • Step S405 If the NNI side link 3 first fails, it is consistent with step S402, and then the UNI side link 7 fails.
  • the PE4 node MSP protection detects the working link failure and quickly switches to the protection link.
  • the traffic forwarding situation has two flows from the NNI side to the UNI side: (a) link 1 ⁇ link 4 ⁇ link 6 ⁇ link 7 (fault) ⁇ link 9, (b) link 1 ⁇ Link 4 ⁇ link 8 ⁇ link 9, the PE4 node works in the alternative receiving traffic (b) according to the current MSP protection, the traffic coming through the link 7 is blocked due to the link failure; the traffic from the UNI side to the NNI side also has two Strip traffic: (a) link 10 ⁇ link 7 (fault) ⁇ link 6 ⁇ link 4 ⁇ link 2, (b) link 10 ⁇ link 8 ⁇ link 4 ⁇ link 2, PE2 node According to the current working state, the traffic is selected (b), and the traffic coming through the link 7 is blocked due to the link failure.
  • Step S406 If the eNB side link 7 first fails, it is consistent with step S403, and then the NNI side link 3 fails.
  • the PE1 and PE2 node pseudowire protection detects the working link failure and quickly switches to the protection link.
  • Step S407 If the NNI side link 3 first fails, it is consistent with step S402, and then the UNI side link 8 fails. At this time, the traffic forwarding situation has two flows from the NNI side to the UNI side: (a) link 1 ⁇ link 4 ⁇ link 6 ⁇ link 7 ⁇ link 9, (b) link 1 ⁇ link 4 ⁇ link 8 (fault) ⁇ link 9, the PE4 node works according to the current MSP protection in the main election receiving traffic (a), the traffic coming through the link 8 is blocked due to the link failure; the UNI side to the NNI side traffic due to the chain The road 8 fault has only one traffic: link 10 ⁇ link 7 ⁇ link 6 ⁇ link 4 ⁇ link 2.
  • Step S408 If the UNI side link 8 first fails, it is consistent with step S404, and then the NNI side link 3 fails.
  • the PE1 and PE2 node pseudowire protection detects the working link failure and quickly switches to the protection link.
  • the traffic forwarding situation has two flows from the NNI side to the UNI side: (a) link 1 ⁇ link 4 ⁇ link 6 ⁇ link 7 ⁇ link 9, (b) link 1 ⁇ link 4 ⁇ link 8 (fault) ⁇ link 9, the PE4 node works according to the current MSP protection in the main election receiving traffic (a), the traffic coming through the link 8 is blocked due to the link failure; the UNI side to the NNI side traffic due to the chain
  • the road 8 fault has only one traffic: link 10 ⁇ link 7 ⁇ link 6 ⁇ link 4 ⁇ link 2.
  • step S404 If the network side link 3 failure disappears, the process goes to step S404.
  • Step S409 The DNI master node PE2 is powered off.
  • PE1 node PW pseudowire protection detects that the working link is faulty and quickly switches to the protection PW link.
  • the PE3 node DNI PW pseudowire protection detects the working link failure and quickly switches to the protection PW link, and the PE4 node LMSP protection A fault is detected on the working link to quickly switch to the protection AC link. At this time, traffic is forwarded.
  • step S401 If the fault of the DNI master node PE2 disappears, the process goes to step S401.
  • the PW APS is a network protection mechanism. It is mainly used for network-side fault detection and service switching. When the working PW fails, the service is switched to the protection PW to protect the services carried on the working PW.
  • the PW APS detects the status of the working PW and the protection PW through the PW (bidirectional forwarding detection) mechanism or the OAM (Operation Administration and Maintenance) detection mechanism.
  • the PE device detects the working PW failure, both ends
  • the PE device exchanges the APS protocol and performs PW APS switching.
  • the service is switched to the protection PW to implement service protection.
  • PW APS supports two networking applications: In-Device Protection Group and Cross-Device (MC-PW APS) Protection Group. Normally, the service is transmitted on the working PW. When the working PW fails, APS protection switching occurs, and the service is transmitted on the protection PW.
  • the PW APS status detection switching process is as follows:
  • Step S501 Enable OAM/BFD packet detection on the working PW of the PE1 device in the pseudo-line protection group, and go to step S502.
  • Step S502 It is determined whether the PW of the working link of the pseudo-line protection group has an OAM/BFD detection alarm. If yes, it is determined that the working PW is faulty. Then, the process goes to step S503.
  • Step S503 On the PE1 device, the APS performs protocol to calculate whether the pseudowire protection group is switched. If yes, go to step S504.
  • Step S504 On the primary PW of the working link of the pseudo-line protection group, the OAM/BFD packet detects that the link is faulty, and the APS performs the protocol calculation. The pseudo-line protection group switches to the protection link protection PW. Then, the process goes to step S505.
  • Step S505 It is determined whether the OAM/BFD detection alarm on the primary PW of the pseudo-line protection working link disappears, and if yes, go to step S506.
  • Step S506 The OAM/BFD detection packet is sent on the primary PW of the pseudowire protection working link, and the link fault is notified to disappear, and the process goes to step S507.
  • Step S507 The OAM/BFD packet detection link failure alarm disappears on the primary PW of the working link of the pseudo-line protection group, and the APS calculates the pseudo-line protection to switch back to the working link main PW, and the process goes to step S502.
  • a LAG is a technology that aggregates multiple Ethernet ports to form a logical port.
  • the LACP protocol is used to dynamically control whether a physical port is added to an aggregation group.
  • each LAG group can be configured with two members to form a 1:1 protection mode.
  • the service is transmitted only on the working port. When the working port is faulty, the protection port can be quickly enabled to ensure normal service traffic. jobs.
  • LMSP is a linear multiplex section protection, mainly used to simulate the protection of narrowband service ports.
  • the LMSP completes the exchange of the switching protocol by the overhead K1/K2 bytes of the multiplex section in the SDH frame.
  • LAG/MSP is mainly used for user side fault detection and link switching.
  • the user side link failure on PE2, PE3, and PE4, and the LAG/LMSP or MC-LAG/LMSP link state detection switching procedure are as follows:
  • Step S601 Enable LAG/SDH packet detection on the active link primary AC (referring to the working AC) of the LAG/LMSP port protection group device, and go to step S602.
  • Step S602 It is determined whether the LAG/LMSP protects the active AC of the working link whether there is a link detection alarm, if there is a step S603.
  • step S603 the detection of the link failure generated on the active AC of the working link is switched to the protection link standby AC (referring to the protection AC), and the process goes to step S604.
  • Step S604 Determine whether the alarm on the primary AC of the LAG/MSP port protection group disappears, and if yes, go to step S605.
  • Step S605 The link fault on the working link primary AC disappears, and the process goes to step S606.
  • Step S606 The link failure alarm of the working link primary AC disappears, and the LAG/LMSP port protection is switched back to the working link primary AC, and the process goes to step S602.
  • a second embodiment of the present invention provides a method for switching a pseudo-line dual-homing protection. As shown in FIG. 4, the method includes the following steps:
  • Step 401 The network side source node sends traffic to the user side device by using the working pseudowire PW or the protection PW, and the user side device sends the traffic to the network side device by using the working AC and the protection AC respectively.
  • Step 402 When the network side source node sends the traffic to the user side source node, the active node protects the working AC through the first DNI PW and carries the traffic coming from the network side source node; the standby node protects the AC through the second DNI PW protection, and Carrying traffic from the source node of the network side;
  • the primary node protects the working AC by using the first DNI PW, including: the primary node sends the traffic to the standby node by using the first DNI PW;
  • the standby node protects the AC through the second DNI PW protection, including: the standby node sends the traffic to the active node through the second DNI PW.
  • the standby node When the primary node sends the traffic to the standby node through the first DNI PW, the standby node sends the traffic coming from the first DNI PW to the network side source node through the protection PW;
  • the primary node forwards the traffic coming from the second DNI PW to the user-side source node through the working AC.
  • Step 403 When the user-side source node sends the traffic to the network-side source node, the active node protects the working PW through the second DNI PW and carries the traffic coming from the user-side source node;
  • the first DNI PW protects the PW and carries traffic from the user-side source node;
  • the primary node protects the working PW by using the second DNI PW, including: the primary node sends the traffic to the standby node by using the second DNI PW;
  • the standby node protects the PW by the first DNI PW protection, including: the standby node sends the traffic to the active node through the first DNI PW.
  • the standby node When the primary node sends the traffic to the standby node through the second DNI PW, the standby node sends the traffic coming from the second DNI PW to the network side source node through the protection PW;
  • the primary node forwards the traffic to the network side source node according to the working state of the working PW.
  • the working status of the working PW includes: fault and no fault;
  • the active node forwards the traffic coming from the first DNI PW to the network side source node through the working PW;
  • the active node quickly switches the traffic received on the first DNI PW to the second DNI PW and sends the traffic to the standby node, and forwards the packet to the network side source node through the standby node.
  • a third embodiment of the present invention provides a method for switching a pseudo-line dual-homing protection. As shown in FIG. 5, the method includes:
  • Step 501 When the network side source node sends the traffic to the user side source node, the active node protects the working AC through the first DNI PW and carries the traffic coming from the network side source node.
  • the primary node protects the working AC by using the first DNI PW, including: the primary node sends the traffic to the standby node by using the first DNI PW;
  • Step 502 When the user side source node sends traffic to the network side source node, the primary node passes the The second DNI PW protects the working PW and carries the traffic coming from the user side source node.
  • the primary node protects the working PW through the second DNI PW, including: the primary node sends the traffic to the standby node through the second DNI PW.
  • the method further includes: when the primary node receives the traffic sent by the standby node through the second DNI PW, forwarding the traffic coming from the second DNI PW to the user side source node through the working AC; the primary node receives the standby node through the first When the traffic sent by a DNI PW is forwarded to the network side source node according to the working state of the working PW.
  • the active node forwards the traffic to the network side source node according to the working state of the working PW, including:
  • the active node forwards the traffic coming from the first DNI PW to the network side source node through the working PW;
  • the active node quickly switches the traffic received on the first DNI PW to the second DNI PW and sends the traffic to the standby node, and forwards the packet to the network side source node through the standby node.
  • a fourth embodiment of the present invention provides a pseudo-line dual-homing protection switching device, which is located on a primary node. As shown in FIG. 6, the device includes: a first DNI PW 61 and a second DNI PW 62;
  • the first DNI PW 61 is configured to protect the working AC and carry the traffic from the network side source node when the network side source node sends the traffic to the user side source node;
  • the second DNI PW 62 is configured to protect the working PW and carry the traffic from the user-side source node when the user-side source node sends the traffic to the network-side source node.
  • the first DNI PW 61 protects the working AC by:
  • the second DNI PW 62 protects the working PW by:
  • the device further includes: a first traffic forwarding module 63 configured to forward the traffic coming from the second DNI PW to the user side source through the working AC when the primary node receives the traffic sent by the standby node through the second DNI PW
  • the node is further configured to: when the primary node receives the traffic sent by the standby node through the first DNI PW, forward the traffic to the network side source node according to the working state of the working PW.
  • the device further includes a determining module 64 configured to determine a current working state of the working PW, the working state including: fault and no fault.
  • the first traffic forwarding module 63 is configured to forward the traffic coming from the first DNI PW 61 to the network side source node through the working PW when the working PW is faultless;
  • the traffic received on the first DNI PW 61 is quickly switched to the second DNI PW 62 and sent to the standby node, and forwarded to the network side source node through the standby node.
  • a fifth embodiment of the present invention provides a pseudowire dual-homing protection switching method. As shown in FIG. 7, the method includes:
  • Step 701 When the network side source node sends the traffic to the user side source node, the standby node protects the AC through the second DNI PW, and carries the traffic coming from the network side source node.
  • the standby node protects the AC through the second DNI PW protection, including: the standby node sends the traffic to the active node through the second DNI PW.
  • Step 702 When the user-side source node sends the traffic to the network-side source node, the standby node protects the PW through the first DNI PW and carries the traffic from the user-side source node.
  • the standby node protects the PW by the first DNI PW protection, including: the standby node sends the traffic to the active node through the first DNI PW.
  • the method further includes: the standby node receiving the primary node sends the first DNI PW When the traffic is sent, the traffic coming from the first DNI PW is sent to the network side source node through the protection PW;
  • the standby node When receiving the traffic sent by the primary node through the second DNI PW, the standby node sends the traffic coming from the second DNI PW to the network side source node through the protection PW.
  • the sixth embodiment of the present invention provides a pseudo-line dual-homing protection switching device, which is located at a standby node. As shown in FIG. 8, the device includes: a third DNI PW 81 and a fourth DNI PW 82;
  • the third DNI PW 81 is configured to protect the PW and carry the traffic from the user-side source node when the user-side source node sends the traffic to the network-side source node.
  • the fourth DNI PW 82 is configured to protect the AC and carry traffic from the network side source node when the network side source node sends traffic to the user side source node.
  • the third DNI PW 81 protects the protection PW by:
  • the fourth DNI PW 82 protects the protection AC by:
  • the device further includes: a second traffic forwarding module 83 configured to: when receiving the traffic sent by the primary node through the first DNI PW, send the traffic coming from the first DNI PW to the network side source node through the protection PW; It is further configured to send the traffic coming from the second DNI PW to the network side source node through the protection PW when receiving the traffic sent by the primary node through the second DNI PW.
  • a second traffic forwarding module 83 configured to: when receiving the traffic sent by the primary node through the first DNI PW, send the traffic coming from the first DNI PW to the network side source node through the protection PW; It is further configured to send the traffic coming from the second DNI PW to the network side source node through the protection PW when receiving the traffic sent by the primary node through the second DNI PW.
  • the first traffic forwarding module 63 and the determining module 64 may be a central processing unit (CPU, Central Processing Unit), a microprocessor (MPU, a digital processing unit), and a digital signal processor in the active node. (DSP, Digital Signal Processor) Or a programmable logic array (FPGA); the second traffic forwarding module 83 can be implemented by a CPU, MPU, DSP or FPGA in the standby node; the first DNI PW 61, the second DNI The PW 62, the third DNI PW 81, and the fourth DNI PW 82 can be implemented by a communication link.
  • CPU Central Processing Unit
  • MPU Microprocessor
  • FPGA programmable logic array
  • Embodiments of the present invention also provide a computer storage medium, the storage medium comprising a set of computer executable instructions for performing a pseudowire dual return protection switching method of an active node.
  • Embodiments of the present invention also provide a computer storage medium, the storage medium comprising a set of computer executable instructions for performing a pseudowire dual return protection switching method of a standby node.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention can take the form of a hardware embodiment, a software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Landscapes

  • Data Exchanges In Wide-Area Networks (AREA)
  • Telephonic Communication Services (AREA)

Abstract

L'invention concerne un système de commutation de protection de pseudo-fil à double anneau, qui comprend : un nœud maître, un nœud de réserve, un nœud source côté réseau et un nœud source côté utilisateur, un PW de travail étant disposé entre le nœud maître et le nœud source côté réseau, un PW de protection étant disposé entre le nœud de réserve et le nœud source côté réseau, un CA de travail étant disposé entre le nœud maître et le nœud source côté utilisateur, un CA de protection étant disposé entre le nœud de réserve et le nœud source côté utilisateur ; un premier et un second PW DNI sont disposés entre le nœud maître et le nœud de réserve ; le premier PW DNI est configuré pour protéger le CA de travail sur le nœud maître et supporter le trafic provenant du nœud source côté réseau et il est également utilisé pour protéger le PW de protection sur le nœud de réserve et supporter le trafic provenant du nœud source côté utilisateur ; et le second PW DNI est configuré pour protéger le PW de travail sur le nœud maître et supporter le trafic provenant du nœud source côté utilisateur et il est en outre configuré pour protéger le CA de protection sur le nœud de réserve et supporter le trafic provenant du nœud source côté réseau. L'invention concerne également un procédé et un dispositif de commutation de protection de pseudo-fil en double anneau.
PCT/CN2015/074617 2014-12-01 2015-03-19 Système, procédé et dispositif de commutation de protection de pseudo-fil en double anneau WO2016086548A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201410715264.5 2014-12-01
CN201410715264.5A CN105656776B (zh) 2014-12-01 2014-12-01 一种伪线双归保护切换系统、方法和装置

Publications (1)

Publication Number Publication Date
WO2016086548A1 true WO2016086548A1 (fr) 2016-06-09

Family

ID=56090898

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2015/074617 WO2016086548A1 (fr) 2014-12-01 2015-03-19 Système, procédé et dispositif de commutation de protection de pseudo-fil en double anneau

Country Status (2)

Country Link
CN (1) CN105656776B (fr)
WO (1) WO2016086548A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114826872A (zh) * 2022-04-02 2022-07-29 烽火通信科技股份有限公司 一种节点保护告警联动优化方法及装置

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109787895B (zh) * 2019-03-29 2020-10-27 烽火通信科技股份有限公司 一种双归保护方法、接入节点、设备及通信网络
CN110351129B (zh) * 2019-06-27 2021-12-14 烽火通信科技股份有限公司 分组传输跨域保护方法及系统
CN112769587B (zh) * 2019-11-05 2024-05-14 中兴通讯股份有限公司 双归设备接入流量的转发方法、设备及存储介质
CN111131035A (zh) * 2019-12-18 2020-05-08 新华三半导体技术有限公司 数据传输方法及装置
CN111865798B (zh) * 2020-06-29 2022-08-05 烽火通信科技股份有限公司 一种mpls-tp双归保护主辅节点ac侧消息通信的实现方法及系统

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102325037A (zh) * 2011-05-25 2012-01-18 中兴通讯股份有限公司 一种伪线双归网络的切换方法、系统和双归属运营商设备
CN102710523A (zh) * 2012-06-14 2012-10-03 中兴通讯股份有限公司 路径的切换方法及系统

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101141330B (zh) * 2007-10-23 2010-06-16 华为技术有限公司 一种为lsp隧道建立bfd检测的方法、系统及设备
CN101257441B (zh) * 2008-02-29 2011-12-21 华为技术有限公司 转发报文的方法、设备、系统和接收报文的设备
CN101616051B (zh) * 2008-06-27 2011-09-14 华为技术有限公司 创建伪线的方法及装置
CN101902353B (zh) * 2009-05-31 2013-06-12 华为技术有限公司 分组网络的保护方法
CN101984591B (zh) * 2010-10-13 2015-05-06 中兴通讯股份有限公司 一种传送多协议标记交换网络中业务收敛的方法及系统
CN102487327B (zh) * 2010-12-01 2015-05-20 中兴通讯股份有限公司 业务切换方法及装置
IL210375A0 (en) * 2010-12-30 2011-03-31 Eci Telecom Ltd Technique for protecting communication traffic in a connection having redundancy
CN102611577A (zh) * 2012-03-02 2012-07-25 中兴通讯股份有限公司 一种基于ldp会话的pw保护方法、装置及系统

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102325037A (zh) * 2011-05-25 2012-01-18 中兴通讯股份有限公司 一种伪线双归网络的切换方法、系统和双归属运营商设备
CN102710523A (zh) * 2012-06-14 2012-10-03 中兴通讯股份有限公司 路径的切换方法及系统

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114826872A (zh) * 2022-04-02 2022-07-29 烽火通信科技股份有限公司 一种节点保护告警联动优化方法及装置
CN114826872B (zh) * 2022-04-02 2023-05-26 烽火通信科技股份有限公司 一种节点保护告警联动优化方法及装置

Also Published As

Publication number Publication date
CN105656776A (zh) 2016-06-08
CN105656776B (zh) 2020-03-27

Similar Documents

Publication Publication Date Title
WO2016086548A1 (fr) Système, procédé et dispositif de commutation de protection de pseudo-fil en double anneau
CN102571426B (zh) 一种双归保护方法和装置
JP4899959B2 (ja) Ｖｐｎ装置
EP1881643B1 (fr) Procede de commutation de protection de pseudo-cable dans le reseau a commutation de paquets et dispositif associe
EP2204947A1 (fr) Procédé et dispositif de n ud de détection de défaillance et de convergence ethernet
US20140211641A1 (en) Using ethernet ring protection switching with computer networks
CN105871674B (zh) 环保护链路故障保护方法、设备及系统
US9467332B2 (en) Node failure detection for distributed linear protection
US9264298B2 (en) Technique for bundling in link aggregation
WO2015196676A1 (fr) Procédé et dispositif de protection de réseau social et élément de réseau de convergence principal dans un réseau social
EP3182645B1 (fr) Procédé de commutation de protection de réseau, dispositif de réseau et support d'informations
WO2017008862A1 (fr) Procédé de restauration pour un réseau en anneau mpls
CN108243114A (zh) 一种转发报文的方法、设备及系统
WO2013178097A1 (fr) Procédé, dispositif et système d'annonce
JP6408615B2 (ja) 二重接続リングネットワーク保護方法及び装置
CN104702431B (zh) 一种虚拟专用网双断保护的方法及装置
CN105681149A (zh) 环网保护方法及装置
JP7027542B2 (ja) 障害がある多層リンク復旧方法およびコントローラ
WO2016161802A1 (fr) Procédé et système pour réaliser une commutation rapide de dni-pw
EP3462681B1 (fr) Appareil et procédé de transmission de service de multidiffusion
WO2016070535A1 (fr) Procédé et appareil de réarrangement dans un réseau en anneau de commutation d'étiquettes multi-protocoles
US11595119B2 (en) Protection switching based on exchange of protection information
WO2016061943A1 (fr) Procédé et appareil pour la mise en oeuvre de commutation de protection de protocole d'arbre recouvrant, et support de stockage informatique
CN107786435B (zh) 伪线保护方法及装置
WO2017124722A1 (fr) Procédé et appareil d'acheminement de service de pseudo-câble

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15864839

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 15864839

Country of ref document: EP

Kind code of ref document: A1