CN110351129B - Packet transmission cross-domain protection method and system - Google Patents
Packet transmission cross-domain protection method and system Download PDFInfo
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- CN110351129B CN110351129B CN201910569446.9A CN201910569446A CN110351129B CN 110351129 B CN110351129 B CN 110351129B CN 201910569446 A CN201910569446 A CN 201910569446A CN 110351129 B CN110351129 B CN 110351129B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
- H04L41/0668—Management of faults, events, alarms or notifications using network fault recovery by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure
Abstract
The invention discloses a packet transmission cross-domain protection method and a system, and relates to the field of packet transmission network protection. The method comprises the following steps: on each interconnection node of the MC-LAG, the AC side link state, the network side link state and the network side preferred link of the interconnection node are associated to form a protection switching triple group; the AC side link state and the network side link state comprise a normal state and an abnormal state; and after all the interconnection nodes of the same MC-LAG select the protection switching triple group with the highest priority, carrying out protection switching on the AC side and the network side according to the interconnection node corresponding to the protection switching triple group with the highest priority. The invention can realize the cross-domain protection switching of the packet transmission under the principle that the link failure in the domain protection domain is not transmitted to the outside of the domain.
Description
Technical Field
The invention relates to the field of packet transmission network protection, in particular to a packet transmission cross-domain protection method and a system.
Background
The packet transmission network adopts layered domain-division networking to realize flexible expansion, different subnetworks protect respective services, and high reliability requirements of cross-domain (layered domain-division) transmission can be realized among different subnetworks by utilizing a dual-node interconnection protection technology; that is, 2 domains on the AC side and the network side are interconnected through 2 nodes:
under the Ethernet export scene of the AC side (client access side), MC-LAG (Multi-Chassis Link Aggregation Group) dual-homing protection technology (namely, 2 interconnected nodes form 1 Group of Link Aggregation working Group) is mostly adopted, and the network side can deploy pseudo-wire redundancy protection to realize the dual-homing protection of the service so as to resist the wind of service interruption caused by single point failure of the end-to-end service and provide the redundancy protection function of inter-domain interconnected network equipment.
At present, the existing cross-domain protection method is as follows: after the protection switching (i.e. main/standby switching) occurs in the domain, the domain informs other domains, and the other domains perform corresponding protection switching according to the switched link in the domain; for example, after the protection switching of the network side link occurs, the AC side is often informed by disconnecting the link with the fault, so as to prompt the AC side to perform the corresponding protection switching, which violates the principle that the link fault in the sub-domain protection domain is not transmitted to the outside of the domain.
Disclosure of Invention
Aiming at the defects in the prior art, the invention solves the technical problems that: the protection switching of packet transmission across domains is realized under the principle that the link failure in the domain protection domain is not transmitted outside the domain.
In order to achieve the above object, the present invention provides a packet transmission cross-domain protection method, which comprises the following steps: on each interconnection node of the MC-LAG, the AC side link state, the network side link state and the network side preferred link of the interconnection node are associated to form a protection switching triple group; the AC side link state and the network side link state comprise a normal state and an abnormal state; and after all the interconnection nodes of the same MC-LAG select the protection switching triple group with the highest priority, carrying out protection switching on the AC side and the network side according to the interconnection node corresponding to the protection switching triple group with the highest priority.
On the basis of the above technical solution, the acquiring manners of the AC side link status, the network side link status, and the network side preferred link include: the AC side link state and the network side link state are both initially normal states, and the network side preferred link is specified in advance.
On the basis of the technical scheme, the method further comprises the following steps: when the interconnection node monitors that the AC side link fails, the AC side link state of the node is modified into an abnormal state; when monitoring that the network side link fails, the interconnection node modifies the state of the network side link of the node into an abnormal state and modifies the network side preferred link correspondingly.
On the basis of the above technical solution, selecting a protection switching triple with the highest priority from all interconnected nodes of the same MC-LAG, includes the following steps: and selecting the protection switching triple with the highest priority of the network side preferred link from the protection switching triples of the interconnection nodes with the AC side link state and the network side link state both in normal states as the selected protection switching triple with the highest priority.
On the basis of the above technical solution, the performing protection switching between the AC side and the network side according to the interconnect node corresponding to the protection switching triple with the highest priority includes the following steps: and selecting the interconnection node corresponding to the protection switching triple with the highest priority as a main node, selecting the AC side link of the main node as a main AC side link, and selecting the network side preferred link of the main node as a main network side link.
The invention provides a packet transmission cross-domain protection system, which comprises a protection switching triple creating module, a protection switching triple electing module and a protection switching module;
the protection switching triplet creating module is configured to: on each interconnection node of the MC-LAG, the AC side link state, the network side link state and the network side preferred link of the interconnection node are associated to form a protection switching triple group; the AC side link state and the network side link state comprise a normal state and an abnormal state;
the protection switching triple election module is configured to: selecting a protection switching triple with the highest priority from protection switching triples of the same MC-LAG;
the protection switching module is used for: and carrying out protection switching on the AC side and the network side according to the interconnected node corresponding to the protection switching triple with the highest priority.
On the basis of the above technical solution, the acquiring manners of the AC side link status, the network side link status, and the network side preferred link include: the AC side link state and the network side link state are both initially normal states, and the network side preferred link is specified in advance.
On the basis of the above technical solution, the protection switching triplet creating module is further configured to: when the AC side link is monitored to have a fault, the state of the AC side link is modified into an abnormal state; when the network side link is monitored to have a fault, the state of the network side link is modified into an abnormal state, and the network side preferred link is correspondingly modified.
On the basis of the above technical solution, the work flow of the protection switching triple election module includes: and selecting the protection switching triple with the highest priority of the network side preferred link from the protection switching triples of the interconnection nodes with the AC side link state and the network side link state both in normal states as the selected protection switching triple with the highest priority.
On the basis of the above technical solution, the work flow of the protection switching module includes: and selecting the interconnection node corresponding to the protection switching triple with the highest priority as a main node, selecting the AC side link of the main node as a main AC side link, and selecting the network side preferred link of the main node as a main network side link.
Compared with the prior art, the invention has the advantages that:
the invention can directly carry out protection switching of the AC side and the network side according to the protection switching triple (AC side link state, network side link state and network side preferred link). Therefore, the triggering condition for protection switching in the invention is the change of the triple information, namely the triple information changes to prompt the fault of the corresponding link, thereby avoiding the situation that the fault of the link in the domain is transmitted to the outside of the domain in the prior art. Therefore, the invention can always find a correct channel to transmit the client service from end to end through the protection switching triple group under the condition of conforming to the principle that the link failure in the domain protection is not transmitted to the outside of the domain, thereby realizing the cross-domain cooperative protection switching of the packet transmission.
Drawings
FIG. 1 is a schematic diagram of a single-CE dual-homing PW redundancy protection scenario;
fig. 2 is a schematic diagram of single-CE dual-homing PW redundancy protection AC side link failure protection switching;
fig. 3 is a schematic diagram of single-CE dual-homed PW redundancy protection network side link failure protection switching;
fig. 4 is a schematic diagram of single-CE dual-homed PW redundant protection interconnection node failure protection switching;
FIG. 5 is a schematic diagram of a multi-CE dual-homing PW redundancy protection scenario;
fig. 6 is a schematic diagram of multi-CE dual-homing PW redundancy protection AC side link failure protection switching;
fig. 7 is a schematic diagram of single link failure protection switching at a multi-CE dual-homed PW redundancy protection network side;
fig. 8 is a schematic diagram of protection switching loss of a single node due to 2-link continuous failure at the multi-CE dual-homed PW redundancy protection network side;
fig. 9 is a schematic diagram of multi-node loss-of-link protection switching caused by 3-link continuous failure at the multi-CE dual-homed PW redundancy protection network side;
fig. 10 is a schematic diagram of failure protection switching of a multi-CE dual-homed PW redundant protection interconnect node.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
The packet transmission cross-domain protection method in the embodiment of the invention comprises the following steps:
on each interconnection node of the MC-LAG, the AC side link state, the network side link state and the network side preferred link of the interconnection node are associated to form a protection switching triple group; the AC side link state and the network side link state comprise a normal state and an abnormal state. And after all the interconnection nodes of the same MC-LAG select the protection switching triple group with the highest priority, carrying out protection switching on the AC side and the network side according to the interconnection node corresponding to the protection switching triple group with the highest priority.
Therefore, the protection switching method and the protection switching device can directly carry out protection switching on the AC side and the network side according to the protection switching triple (the AC side link state, the network side link state and the network side preferred link), and further avoid the situation that the link failure in the domain is transmitted to the outside of the domain in the prior art. Therefore, the invention can always find a correct channel to transmit the client service from end to end through the protection switching triple group under the condition of conforming to the principle that the link failure in the domain protection is not transmitted to the outside of the domain, thereby realizing the cross-domain cooperative protection switching of the packet transmission.
The method of the present invention is illustrated by the following six examples.
The first embodiment is as follows:
the method for acquiring the AC side link state, the network side link state and the network side preferred link comprises the following steps: the AC side link state and the network side link state are both initially normal states, and the network side preferred link is specified in advance (in the same way as in the prior art).
Example two:
the method further comprises the following steps: and when the interconnection node monitors that the AC side link fails, the AC side link state of the node is modified into an abnormal state. When monitoring that the network side link fails, the interconnection node modifies the state of the network side link of the node into an abnormal state and modifies the network side preferred link correspondingly, because the network side link fails, the network side preferred link represents that the previous network side preferred link cannot communicate, and therefore the network side preferred link needs to be modified into a network side link which can communicate and has the highest priority.
Example three:
in the method, all interconnected nodes of the same MC-LAG select a protection switching triple with the highest priority, and the method comprises the following steps:
s101: determining whether at least one of the following two situations occurs:
in case one, the AC side link states of all the interconnection nodes of the same MC-LAG are all abnormal states;
in case, the network side link states (failed interconnection node exclusion) of all interconnection nodes of the same MC-LAG are all abnormal states;
if yes, all links are proved to be incapable of communicating, at this time, direct error reporting is finished, otherwise, the process goes to S102.
S102: and selecting a protection switching triple group with the highest priority of a network side preferred link from the protection switching triple groups of the interconnection nodes with the AC side link state and the network side link state both in normal states, wherein the protection switching triple group is the protection switching triple group with the highest priority selected by all the interconnection nodes of the same MC-LAG.
Example four:
the method carries out protection switching of an AC side and a network side according to an interconnected node corresponding to a protection switching triple with the highest priority, and comprises the following steps:
and selecting the interconnection node corresponding to the protection switching triple with the highest priority as a main node, and taking other interconnection nodes as standby nodes. Through negotiation with an access side device by an LACP (Link Aggregation Control Protocol), an AC side Link of a master node is selected as an Active AC side Link (that is, the Link is set to an automatic communication state Active), and an AC side Link of a Standby node is selected as a Standby AC side Link (that is, the Link is set to a Standby state Standby). Selecting a network side preferred link of the main node as a main network side link, and activating an available pseudo wire with the highest priority in the main network side link; and taking other available network side links of the main node as standby links.
Example five: referring to fig. 1, the application scenario is to configure a dual-homing service from CE1 (client side device) to NE3 after passing through NE1 (network side device) or NE2, respectively, that is, the AC side links are 2: CE1 to NE1, CE1 to NE2, network side links are 2: NE1 to NE3 (primary path), NE2 to NE3 (backup path); NE1 and NE2 are interconnection nodes on the AC side and the network side, and PW redundancy is configured on NE3, that is, a plurality of pseudowires are configured to communicate with NE1 and NE3, respectively.
The packet transmission cross-domain protection method under the scene comprises the following steps:
the dual-homing service from CE1 to NE1 and NE2, respectively, is implemented by configuring MC-LAG of NE1 and NE2 (i.e. NE1, NE2, and CE1 form a 1-group link aggregation working group), and the MC-LAG is configured as a non-load-sharing working mode (i.e. a master-slave switching working mode).
Acquiring AC side link states and network side link states of NE1 and NE2, wherein the normal state is marked by 0, and the abnormal state is marked by 1;
the AC side link state and the network side link state in the initial state are both 0. The network side preferred links of NE1 and NE2 are specified in the following mode: the node priority NE1> NE2> NE3 is specified, and the network side preferred link is identified by a head-to-tail two-end node binary group; the network side preferred link of NE1 is NE1-NE3 and the network side preferred link of NE2 is NE2-NE3, although the network side preferred link may also be configured directly.
Referring to fig. 1, it can be seen that the protection switching triplet of NE1 is <0, 0, NE1-NE3>, the protection switching triplet of NE2 is <0, 0, NE2-NE3>, and since the priority of NE1-NE3 is higher than that of NE2-NE3, the interconnect node corresponding to the protection switching triplet with the highest priority is NE 1.
The MC-LAG election NE1 is a main node, the NE1 sets NE1-CE1 (primary AC side link) as Active, and informs the NE1-NE3 that the network side link state is 0; the MC-LAG election NE2 is a Standby node, the NE2 sets the NEs 2-CE1 (Standby AC side link) to Standby (blocking), and notifies the NEs 2-NE3 that the network side link status is 1.
If NE3 is not a dual-homed node, it considers that the AC side link (bit marked in fig. 1) of NE3 is always in Active state, and advertises that the network side link states of NE3-NE1 and NE3-NE2 are both 0; because the network side links at the two ends of the NE1-NE3 are both 0, the NE1-NE3 are selected as the main network side link, the network side links at the two ends of the NE2-NE3 are respectively 0 and 1, and the NE2-NE3 is selected as the standby network side link.
Referring to fig. 1, the bidirectional ingress corresponding to a link in the figure respectively identifies W-E (West-East) direction traffic from CE1 to NE3 and E-W direction traffic from NE3 to CE1, the working mode of the active network side link is W, the protection mode of the standby network side link is W, the bracket (X) indicates the priority of the network side link, the priority of 0 is higher than 1, the priority of the network side link is set to 0 or 1 depending on the AC side forwarding state, the network side link is in the active state only when the priorities of both ends of the network side link are 0, and only the working state of the network side link in the direction is identified in fig. 1.
Referring to fig. 2, when an AC side link fails, for example, a CE1-NE1 link fails, NE1 detects the failure, modifies the protection switching triplet to be <1, 0, NE1-NE3>, and determines that the protection switching triplet of NE2 has the highest priority after cross-device negotiation between NE1 and NE 2.
And according to the interconnection node corresponding to the protection switching triple with the highest priority, carrying out protection switching on the AC side and the network side:
referring to fig. 2, the MC-LAG election NE2 is a master node, the NE2 sets the NE2-CE1 (primary AC side link) as Active, and notifies the network side link status of the NE2-NE3 as 0; the MC-LAG election NE1 is a Standby node, NE1 sets NE1-CE1 (Standby AC side link) to Standby, and notifies NE1-NE3 that the network side link state is 1. At this time, the network side links at both ends of NE2-NE3 are both 0, so NE2-NE3 are selected as the primary network side link, and the network side links at both ends of NE1-NE3 are respectively 0 and 1, and NE2-NE3 is selected as the backup network side link.
Referring to fig. 3, when a network side link fails, such as a failure of NE1-NE3, NE1 detects a failure of NE1-NE3, and modifies the protection switching triple to be <0, 1, NE1-NE3>, and since there is only one network side link of NE1, there is no other available network side link, therefore, NE1-NE3 in the triple can be set to be empty or reserved, and no way whatsoever will affect the subsequent flow. After cross-device negotiation between NE1 and NE2, the protection switching triplet of NE2 is determined to have the highest priority. And performing protection switching on the AC side and the network side according to the interconnected node corresponding to the protection switching triple with the highest priority, wherein the specific flow is the same as that described above.
Referring to fig. 4, when a node fails, for example, NE1 fails, NE2 detects an opposite end failure, and performs protection switching between the AC side and the network side according to the interconnection node corresponding to the protection switching triple with the highest priority, where the specific flow is the same as that described above.
And if other links and/or nodes fail or the links and/or nodes recover from the failure state, performing protection switching between the AC side and the network side according to the interconnection node corresponding to the protection switching triple with the highest priority in the manner described above.
Example six: referring to fig. 5, the application scenario is that NE1 and NE2 are configured to be connected from CE1 in a dual-homing manner, and NE1 and NE2 establish LAG protection of LACP with CE1 through MC-LAG (the priority of MC-LAG adopts the generation mechanism proposed by scenario one); CE2 is connected with NE3 and NE4 in a double-homing way, and NE3 and NE4 establish LAG protection of LACP through MC-LAG and CE 2.
Referring to fig. 5, since the MC-LAG node of the scenario is dually homed to other nodes through two redundant PWs, that is, there are 2 network-side links (e.g., NE1-NE3, NE1-NE4) per interlink node; therefore, there are 2 groups of protection switching triplets in this scenario.
The packet transmission cross-domain protection method under the scene comprises the following steps:
the AC side link state and the network side link state of NE1 to NE4 in the initial state are both 0. And the network side preferred links of the NE1, the NE2, the NE3 and the NE4 are specified in the following mode: node priorities NE1> NE2> NE3> NE4 are specified, namely NE1-NE3 and NE3-NE1 are preferred links on the network side of NE1 in the order of W-E direction and E-W; the network side preferred links of NE2 are NE2-NE3, NE3-NE 2; the network side preferred links of NE3 are NE1-NE3, NE3-NE1, and the network side preferred links of NE4 are NE1-NE4, NE4-NE 1.
Referring to fig. 5, it can be seen that the protection switching triplets from NE1 to NE4 are in turn <0, 0, NE1-NE3>, <0, 0, NE2-NE3>, <0, 0, NE1-NE3> and <0, 0, NE1-NE4 >; since NE1-NE3 has higher priority than NE2-NE3 and NE1-NE4, the interconnect nodes corresponding to the protection switching triplets with the highest priority are NE1 and NE 3.
The MC-LAG election NE1 is a main node, the NE1 sets NE1-CE1 (primary AC side link) as Active, and informs the NE1-NE3 that the network side link state is 0; the MC-LAG election NE2 is a Standby node, NE2 sets NE2-CE1 (Standby AC side link) to Standby, and notifies NE2-NE3 that the network side link state is 1.
Referring to fig. 5, the MC-LAG election NE3 is a master node, the NE3 sets the NE3-CE2 (primary AC side link) as Active, and notifies the network side link status of the NE1-NE3 as 0; the MC-LAG election NE4 is a Standby node, NE4 sets NE4-CE2 (Standby AC side link) to Standby, and notifies NE1-NE4 that the network side link state is 1.
Referring to fig. 5, since the network side links at both ends of NE1-NE3 are both 0, the active network side links of NE1 and NE3 are both NE1-NE3, and the other links whose both ends are not both 0 are the standby network side links of the corresponding nodes.
Referring to fig. 6, when an AC side link fails, for example, a CE1-NE1 link fails, NE1 detects the failure, modifies the protection switching triplet to be <1, 0, NE1-NE3>, and determines that the protection switching triplet of NE2 has the highest priority after cross-device negotiation between NE1 and NE 2.
And according to the interconnection node corresponding to the protection switching triple with the highest priority, carrying out protection switching on the AC side and the network side:
referring to fig. 6, the MC-LAG election NE2 is a master node, the NE2 sets the NE2-CE1 (primary AC side link) as Active, and notifies the network side link status of the NE2-NE3 as 0; and the MC-LAG elects NE1 as a Standby node, NE1 sets NE1-CE1 (Standby AC side link) as Standby, and informs NE1-NE3 and NE1-NE4 that the network side link states are 1. At this time, the network side links at both ends of NE2-NE3 are both 0, so NE2-NE3 are selected as the primary network side link.
Referring to fig. 7, when a single link on the network side fails, such as a failure of NE1-NE3, both NE1 and NE3 detect a failure of NE1-NE3, NE1 modifies the protection switching triplet to <0, 0, NE1-NE4>, and NE3 modifies the protection switching triplet to <0, 0, NE2-NE3 >. After cross-device negotiation between NE1 and NE2, determining that the protection switching triplet of NE1 has the highest priority; after cross-device negotiation between NE3 and NE4, the protection switching triplet of NE4 is determined to have the highest priority. And performing protection switching on the AC side and the network side according to the interconnected node corresponding to the protection switching triple with the highest priority, wherein the specific flow is the same as that described above.
Referring to fig. 8, when network side 2 link fails, such as NE1-NE3 and NE1-NE4, NE1, NE3 and NE4 all detect the failure. Since all network side links of the NE1 fail, the NE1 modifies the protection switching triplet to be <0, 1, NE1-NE3 >; the NE3 modifies the protection switching triplet to <0, 0, NE2-NE3>, and the NE4 modifies the protection switching triplet to <0, 0, NE2-NE4 >. After cross-device negotiation between NE1 and NE2, determining that the protection switching triplet of NE2 has the highest priority; after cross-device negotiation between NE3 and NE4, the protection switching triplet of NE3 is determined to have the highest priority. And performing protection switching on the AC side and the network side according to the interconnected node corresponding to the protection switching triple with the highest priority, wherein the specific flow is the same as that described above.
Referring to fig. 9, when a network side 3 link fails, such as NE1-NE3, NE1-NE4, and NE2-NE3, NE1 to NE4 all detect the failure. The NE1 modifies the protection switching triplet to <0, 1, NE1-NE3 >; the NE2 modifies the protection switching triplet to <0, 0, NE2-NE4 >; the NE3 modifies the protection switching triplet to <0, 1, NE1-NE3>, and the NE4 modifies the protection switching triplet to <0, 0, NE2-NE4 >. After cross-device negotiation between NE1 and NE2, determining that the protection switching triplet of NE2 has the highest priority; after cross-device negotiation between NE3 and NE4, the protection switching triplet of NE4 is determined to have the highest priority. And performing protection switching on the AC side and the network side according to the interconnected node corresponding to the protection switching triple with the highest priority, wherein the specific flow is the same as that described above.
Referring to fig. 10, for a node failure, such as a failure of NE1, NE2 to NE4 all detect the failure. The protection switching triplets of NE2 are unchanged, namely <0, 0, NE2-NE3 >; the NE3 modifies the protection switching triplet to <0, 0, NE2-NE3>, and the NE4 modifies the protection switching triplet to <0, 0, NE2-NE4 >. After cross-device negotiation between NE1 and NE2, determining that the protection switching triplet of NE2 has the highest priority; after cross-device negotiation between NE3 and NE4, the protection switching triplet of NE3 is determined to have the highest priority. And performing protection switching on the AC side and the network side according to the interconnected node corresponding to the protection switching triple with the highest priority, wherein the specific flow is the same as that described above.
The packet transmission cross-domain protection system in the embodiment of the invention comprises a protection switching triple creating module, a protection switching triple electing module and a protection switching module.
The protection switching triplet creating module is configured to:
1. on each interconnection node of the MC-LAG, the AC side link state, the network side link state and the network side preferred link of the interconnection node are associated to form a protection switching triple group; the AC side link state and the network side link state comprise a normal state and an abnormal state; the AC side link state and the network side link state are both initially normal states, and the network side preferred link is specified in advance.
2. When the AC side link is monitored to have a fault, the state of the AC side link is modified into an abnormal state; when the network side link is monitored to have a fault, the state of the network side link is modified into an abnormal state, and the network side preferred link is correspondingly modified.
The protection switching triple election module is configured to: selecting a protection switching triple with the highest priority from protection switching triples of the same MC-LAG; the specific work flow comprises the following steps: and selecting the protection switching triple with the highest priority of the network side preferred link from the protection switching triples of the interconnection nodes with the AC side link state and the network side link state both in normal states as the selected protection switching triple with the highest priority.
The protection switching module is used for: performing protection switching on an AC side and a network side according to the interconnected node corresponding to the protection switching triple with the highest priority; the specific work flow comprises the following steps: and selecting the interconnection node corresponding to the protection switching triple with the highest priority as a main node, selecting the AC side link of the main node as a main AC side link, and selecting the network side preferred link of the main node as a main network side link.
It should be noted that: in the system provided in the embodiment of the present invention, when performing inter-module communication, only the division of each functional module is illustrated, and in practical applications, the above function distribution may be completed by different functional modules as needed, that is, the internal structure of the system is divided into different functional modules to complete all or part of the above described functions.
Further, the present invention is not limited to the above-mentioned embodiments, and it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements are also considered to be within the scope of the present invention. Those not described in detail in this specification are within the skill of the art.
Claims (10)
1. A packet transmission cross-domain protection method, comprising the steps of: on each interconnection node of the MC-LAG, the AC side link state, the network side link state and the network side preferred link of the interconnection node are associated to form a protection switching triple group; the AC side link state and the network side link state comprise a normal state and an abnormal state; and after all the interconnection nodes of the same MC-LAG select the protection switching triple group with the highest priority, carrying out protection switching on the AC side and the network side according to the interconnection node corresponding to the protection switching triple group with the highest priority.
2. The packet transmission cross-domain protection method of claim 1, wherein: the acquiring modes of the AC side link state, the network side link state and the network side preferred link comprise: the AC side link state and the network side link state are both initially normal states, and the network side preferred link is specified in advance.
3. The packet transmission cross-domain protection method according to claim 1, further comprising the steps of: when the interconnection node monitors that the AC side link fails, the AC side link state of the node is modified into an abnormal state; when monitoring that the network side link fails, the interconnection node modifies the state of the network side link of the node into an abnormal state and modifies the network side preferred link correspondingly.
4. The packet transmission cross-domain protection method of claim 1, wherein: the method for selecting the protection switching triple with the highest priority from all interconnected nodes of the same MC-LAG comprises the following steps: and selecting the protection switching triple with the highest priority of the network side preferred link from the protection switching triples of the interconnection nodes with the AC side link state and the network side link state both in normal states as the selected protection switching triple with the highest priority.
5. The packet transmission cross-domain protection method according to any one of claims 1 to 4, characterized in that: the protection switching between the AC side and the network side is performed according to the interconnection node corresponding to the protection switching triple with the highest priority, including the following steps: and selecting the interconnection node corresponding to the protection switching triple with the highest priority as a main node, selecting the AC side link of the main node as a main AC side link, and selecting the network side preferred link of the main node as a main network side link.
6. A packet transmission cross-domain protection system is characterized in that: the system comprises a protection switching triple creating module, a protection switching triple electing module and a protection switching module;
the protection switching triplet creating module is configured to: on each interconnection node of the MC-LAG, the AC side link state, the network side link state and the network side preferred link of the interconnection node are associated to form a protection switching triple group; the AC side link state and the network side link state comprise a normal state and an abnormal state;
the protection switching triple election module is configured to: selecting a protection switching triple with the highest priority from protection switching triples of the same MC-LAG;
the protection switching module is used for: and carrying out protection switching on the AC side and the network side according to the interconnected node corresponding to the protection switching triple with the highest priority.
7. The packet transmission cross-domain protection system of claim 6, wherein: the acquiring modes of the AC side link state, the network side link state and the network side preferred link comprise: the AC side link state and the network side link state are both initially normal states, and the network side preferred link is specified in advance.
8. The packet transmission cross-domain protection system according to claim 6, wherein the protection switching triplet creating module is further configured to: when the AC side link is monitored to have a fault, the state of the AC side link is modified into an abnormal state; when the network side link is monitored to have a fault, the state of the network side link is modified into an abnormal state, and the network side preferred link is correspondingly modified.
9. The packet transmission cross-domain protection system of claim 6, wherein: the working process of the protection switching triple election module includes: and selecting the protection switching triple with the highest priority of the network side preferred link from the protection switching triples of the interconnection nodes with the AC side link state and the network side link state both in normal states as the selected protection switching triple with the highest priority.
10. The packet transmission cross-domain protection system according to any one of claims 6 to 9, characterized by: the working process of the protection switching module comprises the following steps: and selecting the interconnection node corresponding to the protection switching triple with the highest priority as a main node, selecting the AC side link of the main node as a main AC side link, and selecting the network side preferred link of the main node as a main network side link.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103516534A (en) * | 2012-06-25 | 2014-01-15 | 中兴通讯股份有限公司 | Method for realizing dual-homing protection switching, and home node |
| CN105656776A (en) * | 2014-12-01 | 2016-06-08 | 中兴通讯股份有限公司 | Pseudo-wire dual-homing protection switching system, method and device |
| CN106452813A (en) * | 2015-08-10 | 2017-02-22 | 中兴通讯股份有限公司 | Hybrid configuration dual-homing protection switching method, device and system for packet transmission network |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102843291B (en) * | 2012-08-16 | 2016-12-07 | 南京中兴软件有限责任公司 | Notifying method, Apparatus and system |
| US9992102B2 (en) * | 2015-08-28 | 2018-06-05 | Ciena Corporation | Methods and systems to select active and standby ports in link aggregation groups |
-
2019
- 2019-06-27 CN CN201910569446.9A patent/CN110351129B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103516534A (en) * | 2012-06-25 | 2014-01-15 | 中兴通讯股份有限公司 | Method for realizing dual-homing protection switching, and home node |
| CN105656776A (en) * | 2014-12-01 | 2016-06-08 | 中兴通讯股份有限公司 | Pseudo-wire dual-homing protection switching system, method and device |
| CN106452813A (en) * | 2015-08-10 | 2017-02-22 | 中兴通讯股份有限公司 | Hybrid configuration dual-homing protection switching method, device and system for packet transmission network |
Non-Patent Citations (2)
| Title |
|---|
| PTN网络保护技术对比分析;迟柏洋;《山东通信技术》;20130331;第33卷(第1期);第17-22页 * |
| 一种基于ITU-T G.8032的多级保护倒换机制;崔素娟等;《光通信研究》;20120831(第4期);第10-12页 * |
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