CN101164307A - Method and gateway equipment for resuming service after switching status of main/standby gateway device - Google Patents
Method and gateway equipment for resuming service after switching status of main/standby gateway device Download PDFInfo
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- CN101164307A CN101164307A CN200680013610.9A CN200680013610A CN101164307A CN 101164307 A CN101164307 A CN 101164307A CN 200680013610 A CN200680013610 A CN 200680013610A CN 101164307 A CN101164307 A CN 101164307A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/56—Routing software
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/40—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass for recovering from a failure of a protocol instance or entity, e.g. service redundancy protocols, protocol state redundancy or protocol service redirection
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Abstract
A method and a gateway device for service recovery when master and slaving gateway devices switched, the said gateway device includes a VRRP module embedding a switching notify module and a BGP module embedding a VRRP apperceiving module, and the VRRP protocol is functioned between said master and slaving gateway devices. The gateway device uses the VRRP virtual address as the source address of the BGP protocol when the BGP protocol connection between the user device and the gateway device is connected, and the new master gateway device establishes BGP protocol connection with the user device by GR manner, after the gateway devices switching the states between master and slaving, so that it is able to ensure the protocol connection is established smoothly between the user device and the new master gateway device. It can short the service interrupt time caused by switching the master and slaving states of the gateway device, and enhance the network reliability to meet the user's demand by this method.
Description
The method and gateway device technical field of active/standby gateway apparatus state resuming service after switching are the present invention relates to the communications field, more particularly, to the method and gateway device of a kind of active/standby gateway apparatus state resuming service after switching.
Background technology
With the development of network technology, requirement of the user to network reliability is increasingly improved, user equipment is usually required the double gateway devices of access, virtual redundant routing protocol (Virtual Router Redundancy Protocol are run between gateway device, VRRP), make it that switching to user equipment for gateway device is transparent.In some scenarios, user equipment is the three-layer equipments such as router, runs bgp protocol between the gateway device with running VRJRP agreements, each other interaction route.In the prior art, under such a application scenarios, if primary gateway device failure causes gateway device status to switch, user equipment removes the Border Gateway Protocol set up between previous primary gateway device（Border Gateway Protocol, BGP neighborhood), the neighborhood of bgp protocol is set up with new primary gateway device again, the process created again is first deleted in the presence of the forwarding-table item of a bgp protocol generation among these, the long period will be caused（Several seconds, even tens seconds more than ten seconds）Service disconnection, it is difficult to meet the requirement of client's Dui Wang Network reliabilities.
In another existing Wang Network systems, gateway device is without using VRRP functions, bgp protocol is set up between user equipment and double gateway devices using the interface or loop-back address of gateway device to connect, the optimization technique of user equipment by the use of bgp protocol itself selects a gateway device to be used as business upstream egress.When selected gateway device breaks down, user equipment selects another gateway device as business upstream egress using its failure of the convergence technology perception of bgp protocol itself.In the prior art, during user equipment perceives primary gateway device failure and is modified as pointing to standby gateway by the forwarding-table item for pointing to primary gateway device, business is to interrupt, when the forwarding quantity is more, its business interruption time is still long, it is difficult to meet requirement of the user to network reliability.
The content of the invention
The present invention provides the method and corresponding gateway device of a kind of active/standby gateway apparatus state resuming service after switching, and new primary gateway device is set up in the case where not causing service disconnection and is set with user
The connection of bgp protocol between standby.
According to an aspect of the present invention, a kind of method of active/standby gateway apparatus state resuming service after switching, including：
When setting up Border Gateway Protocol (BGP) connection between user equipment and gateway device, gateway device uses Virtual to intend redundant routing protocol VRRP virtual addresses as the source address of bgp protocol；
After the switching of gateway device standby usage state, new primary gateway device is set up BGP with user equipment by the way of Graceful Restart GR and is connected.
Alternatively, the gateway device includes VRRP modules and BGP modules, and the user equipment includes BGP modules；Described new primary gateway device, which is set up BGP with user equipment by the way of GR and is connected, to be specifically included：
Gateway device status handover request is advertised to the BGP modules of the new primary gateway device by the VRRP modules in new primary gateway device；
The BGP modules of the new primary gateway device are received after gateway device status handover request, and the connection request message of bgp protocol is sent to the BGP modules of user equipment；
The BGP modules of the user equipment handle received BGP connection request messages in GR modes.
Alternatively, the connection request message of the BGP modules transmission bgp protocol to user equipment is specifically included：The BGP modules of gateway device are set up in message to be put into neighbours restarts mark, initiates the protocol connection request with user equipment.
Alternatively, this method also includes：
Being set up between gateway device has the connection of IBGP agreements, and new primary gateway device and previous primary gateway device have the route that user equipment is issued；After gateway device status switching, when new primary gateway device is set up BGP with user equipment and is connected, the flow returned from bearer network is transmitted to user equipment by primary gateway device newly using described route.
Alternatively, described new primary gateway device is set up by the way of GR with user equipment
During BGP connections, in addition to：
New primary gateway device acquires the route that previously primary gateway device points to user equipment from user equipment again；
Described routing forwarding is given previous primary net by new primary gateway device by IBGP agreements
Equipment is closed, previously primary gateway device retained the route received and deleted its corresponding route directly acquired from user equipment according to the route received；
After the GR of new primary gateway device and user equipment terminates, new primary gateway device deletes the route of all sensing user equipmenies acquired from previous primary gateway device；Terminate with stylish primary gateway device to previously primary gateway device notice GR, previous primary gateway device deletes all routes directly obtained from user equipment.
Alternatively, described new primary gateway device is terminated by extending VRRP protocol massages to previously primary gateway device notice GR.
Alternatively, when new primary gateway device is set up BGP with user equipment and be connected, the source port numbers different from the port numbers of previous primary gateway device connection are used.
Alternatively, this method also includes：When primary gateway device and user equipment, which are set up, to be connected, primary gateway device notices it with user equipment to standby gateway device by extending VRJ P agreements and sets up the source port number that bgp neighbor is used.
According to another aspect of the present invention, a kind of gateway device, including BGP modules and VRRP modules；Also include VRRP and switch sensing module and switching notice module；Wherein,
Described switching notice module gives VRRP switching sensing modules for noticing gateway device status handover request；
Described VRRP switching sensing modules initiate bgp protocol connection request message according to the gateway device status handover request received to the BGP modules of user equipment, and the process that BGP is connected is set up in startup by the way of Graceful Restart GR with user equipment.
Alternatively, described switching notice module is embedded in VRRP inside modules.
Alternatively, described VRRP switchings sensing module is embedded in the BGP inside modules of gateway device.
Alternatively, the VRRP switchings sensing module is set up in message to be put into neighbours restarts mark, initiates the protocol connection request with user equipment.
The present invention is by when active/standby gateway apparatus state switches, by the way of GR, the connection for the bgp protocol set up between primary gateway device newly and user equipment, from the interruption without causing business.
Further, since set up IBGP neighbours between active/standby gateway apparatus, therefore it can solve from holding
The problem of flow that contained network is returned is interrupted for a long time.
Set up between user equipment and gateway device under the scene of bgp neighbor, the business interruption time that gateway device status switching is caused can effectively be shortened, on the basis of VRRP failure Fast Detection Techniques are combined, the fault time of teleservice can be caused to be less than ls, it is significantly better than more than ten seconds of conventional art, or even tens seconds.
It is base this Group net scheme schematic diagrames that embodiment of the present invention is used to illustrate Fig. 1；
Figure is the flow chart of the embodiment of the method for the present invention；
Fig. 3 is the schematic diagram of the system of one embodiment of the invention.
Embodiment must be more clearly understood to express the object, technical solutions and advantages of the present invention, below in conjunction with the accompanying drawings and specific embodiment the present invention is further detailed explanation.
Fig. 1 is the basic networking plan schematic diagram of embodiment of the present invention.Referring to Fig. 1, assuming that gateway device 111 is default primary gateway device, gateway device 112 is standby gateway device, and the signaling of gateway device is in the interchanger of gateway device 111-one 112 --- interchanger 122 --- carries on the link between gateway device 121.
Virtual redundancy route VRRP agreements are run between described gateway device 111 and 121；Described gateway device 111,121 and user equipment 130 configure Graceful Restart GR technologies.
The connection of bgp protocol is set up between user equipment 130 and primary gateway device 111.The source address that described gateway device 111 is connected using VRRP virtual addresses as bgp protocol；The destination address that described user equipment 130 is connected using VRRP virtual addresses as bgp protocol.
Gateway device 111 and 121 is provided with VRRP modules and BGP modules（It is not shown）, user equipment 130 is provided with BGP modules（It is not shown）.
In addition, configuring the binding relationship of VRRP agreements and bgp protocol on gateway device (including primary gateway device 111 and standby gateway device 121).According to the agreement and specified neighbours（User equipment 130) between the message interaction that carries out influenceed by the gateway device status that it is bound, only primary gateway device 111 can normally receive, send protocol massages between user equipment 130, and standby gateway device 121 then neither receives nor sent protocol massages.Therefore, primary gateway device 111 can set up normal protocol neighbors relation with user equipment 130, and standby gateway device 121
Such a neighborhood can not then be set up.Said for user equipment 130, it is gateway device 111 or gateway device 121 to be not relevant for its protocol neighbors, and the neighbor address of its bgp protocol is gateway address (VRRP Virtual addresses）, correspondingly, the next hop address of the forwarding-table item generated according to bgp protocol is also gateway address（VRRP virtual addresses）, the target MAC (Media Access Control) address that the message of forwarding is instructed by the forwarding-table item is the corresponding MAC Address in VRRP Virtual addresses, according to the principle of VRRP agreements, can only be received by primary gateway device 111 and carry out three layers of forwarding.
Certainly, after occurring the switching of active/standby gateway apparatus state, normal protocol neighbors relation can be set up with user equipment 130 by then only switching to the gateway device 121 of master state, and switch to the gateway device 111 of stand-by state can not then set up such a neighborhood.
The switching of active/standby gateway apparatus generating state includes following situation：A. when gateway device 111 breaks down, gateway device 121 detects the failure of gateway device 111 by VRRP signalings or other modes, switches to primary gateway device；B. the priority between gateway device 111 and gateway device 121 is overturn, and gateway device 121 is configured to contention mode, and gateway device 121 actively switches to primary gateway device；C. the configuration of gateway device 111 is changed, away from gateway backup group, gateway device 121 is received after corresponding signaling message, actively switches to primary gateway device.
After active/standby gateway apparatus state switches, the method for the active/standby gateway apparatus state resuming service after switching that the present invention is provided passes through Graceful Restart（Gracef l Restart, GR) mode, in the connection that the bgp protocol between new primary gateway device and user equipment is set up in the case of not causing service disconnection.
As shown in Fig. 2 the embodiment of the method for the present invention includes：
Step 201, gateway device status switch.
For example, gateway device 111 is previous primary gateway device, after gateway device status switches, gateway device 121 upgrades to new primary gateway device.
Step 202, the VRJ P modules of new primary gateway device notify the BGP modules generating state switching of new primary gateway device.
After gateway device status switches, gateway device status handover request is advertised to BGP modules by VRJ P modules.
Step 203, the BGP modules of new primary gateway device initiate bgp protocol connection request message to the BGP modules of user equipment.
As it was previously stated, gateway device 121 is configured with BGP GR abilities, the gateway device status handover request is understood as GR events, actively initiates to be connected with the agreement of user equipment by the BGP modules of gateway device 121；In OPEN, (neighbours set up such as BGP modules）Restart is put into message (to restart）Mark.
Step 204, the BGP modules of user equipment carry out Graceful Restart according to the connection request message received.
Because user equipment 130 also provided BGP GR abilities, and can not distinguished from message therewith set up connection be gateway device 111 or gateway device 121, therefore, when the BGP modules of gateway device 121 initiate new agreement connection, to trigger the GR abilities of user equipment 130, user equipment 130 can with gateway device 121 it is smooth set up protocol neighbors；Moreover, during the foundation of BGP agreements, the forwarding having built up will not be deleted, it is ensured that the up business of user equipment will not be interrupted.
In addition, in order to solve, from the problem of the flow that bearer network is returned interruption for a long time, in embodiments of the present invention, IBGP neighbours to be set up between primary gateway device and standby gateway device.For example, primary gateway device is gateway device 111, standby gateway device is gateway device 121.Shellfish ' j, gateway device 111 forwards the route learnt from user equipment 130 to gateway device 121, its next hop address is set to not change, and still points to user equipment 130 so that equally have the route that user equipment 130 is issued on gateway device 121.After gateway device status switches, gateway device 111 does not delete the route that the bgp neighbor set up with user equipment 130 is acquired immediately, gateway device 121 does not delete the route for the sensing user equipment 130 acquired from gateway device 111 immediately yet, the flow that bearer network is returned still is transmitted to user equipment 130 using the route, to ensure that the business for returning to user equipment 130 is not interrupted.
During the GR of gateway device 121 and user equipment 130, gateway device 121 can acquire the route for pointing to user equipment 130 again, and the route that gateway device 121 is preferably acquired from user equipment 130 simultaneously forwards it to gateway device 111 by IBGP neighbours.The route that the preferred gateways equipment 121 of gateway device 111 is sent, and delete the corresponding route to preceding gateway device 121 is sent route that is directly being acquired from user equipment 130.After the GR of gateway device 121 and user equipment 130 terminates, gateway device deletes the route of all sensing user equipmenies 130 acquired from gateway device 111, simultaneously by extending other protocol massages such as VRRP protocol massages or IBGP, net is notified
Close the GR of equipment 111 to terminate, gateway device 111 deletes all routes directly obtained from user equipment 130 again.So far, on gateway device 121 it is all point to user equipmenies 130 routes be all to be directly obtained from the bgp neighbor set up with user equipment 130, and on gateway device 111 it is all sensing user equipmenies 130 route be all from the IBGP neighbor learnings set up with gateway device 111 to.In the process, gateway device 111 and gateway device 121 all delete the forwarding for pointing to user equipment 130 without active, but use and update with deleting the technology being combined, the flow for being effectively guaranteed return user equipment 130 is not interrupted because of the switching of gateway device status.
It is appreciated that, it is insensitive when the flow interrupt time that user returns to bearer network, or instructed using the other technologies such as static routing or IBGP agreements are disposed on gateway device 111 and gateway device 121 from when the forwarding of the flow of bearer network return, deployment IBGP agreements are not essential between gateway device 111 and gateway device 121.
In addition, for GR processes, typically requiring that the source port number of newly-established connection is different from the port numbers previously connected, the connection request that otherwise TCP may ignore or error handle is new causes GR failures or GR recovery times elongated.In order to solve this problem, primary gateway device can notice the source port number that bgp neighbor that itself and user equipment set up is used by extending other agreements such as VR P agreements or IBGP to standby gateway device, so as to after the primary gateway device that standby gateway device turns into new, when setting up bgp neighbor with user equipment, it can avoid using this port numbers as source port number.
As shown in Fig. 3, in the gateway device that the present invention is provided, switching notice module 311 and VRRP switching sensing modules 321 are provided with.
Switching notice module 311 can be embedded in inside the VRRP modules 310 of gateway device, and VRRP switching sensing modules 321 can be embedded in inside the BGP modules 320 of gateway device.
Wherein, switching notice module 311 is used to switch the notification gateway equipment state handover request of sensing module 321 to VRRP；
Described VRRP switching sensing modules 321 initiate bgp protocol connection request message according to the gateway device status handover request received to the BGP modules 400 of user equipment.
In embodiment, the gateway device status handover request is understood as GR events by the VRRP switching sensing modules 321 of gateway device, actively initiates to be connected with the agreement of user equipment；For example in OPEN, (neighbours set up）Restart is put into message (to restart）Mark.
The BGP modules 400 of the user equipment carry out Graceful Restart GR according to the bgp protocol connection request message received.
It is described above; the only present invention preferably embodiment, but protection scope of the present invention is not limited thereto, it is any be familiar with the people of the technology disclosed herein technical scope in; the change or replacement that can be readily occurred in, should all be included within the scope of the present invention.
Claims (12)
- Claim1. a kind of method of active/standby gateway apparatus state resuming service after switching, it is characterised in that including：When setting up Border Gateway Protocol (BGP) connection between user equipment and gateway device, gateway device uses virtual redundant routing protocol VRJ P virtual addresses as the source address of bgp protocol；After the switching of gateway device standby usage state, new primary gateway device is set up BGP with user equipment by the way of Graceful Restart GR and is connected.2. the method according to claim 1, it is characterised in that the gateway device includes VRRP modules and BGP modules, the user equipment includes BGP modules；Described new primary gateway device, which is set up BGP with user equipment by the way of GR and is connected, to be specifically included：Gateway device status handover request is advertised to the BGP modules of the new primary gateway device by the VRRP modules in new primary gateway device；The BGP modules of the new primary gateway device are received after gateway device status handover request, and the connection request message of bgp protocol is sent to the BGP modules of user equipment；The BGP modules of the user equipment handle received BGP connection request messages in GR modes.3. method according to claim 2, it is characterised in that the connection request message that the BGP modules to user equipment send bgp protocol is specifically included：The BGP modules of gateway device are set up in message to be put into neighbours restarts mark, initiates the protocol connection request with user equipment.4. according to the method described in claim 1, it is characterised in that also include：Being set up between gateway device has the connection of IBGP agreements, and new primary gateway device and previous primary gateway device have the route that user equipment is issued；After gateway device status switching, when new primary gateway device is set up BGP with user equipment and is connected, the flow returned from bearer network is transmitted to user equipment by primary gateway device newly using described route.5. method according to claim 4, it is characterised in that described new primary gateway device when setting up BGP with user equipment by the way of GR and being connected, in addition to：New primary gateway device acquires the route that previously primary gateway device points to user equipment from user equipment again；Described routing forwarding is given previous primary net by new primary gateway device by IBGP agreements Equipment is closed, previously primary gateway device retained the route received and deleted its corresponding route directly acquired from user equipment according to the route received；After the GR of new primary gateway device and user equipment terminates, new primary gateway device deletes the route of all sensing user equipmenies acquired from previous primary gateway device；Terminate with stylish primary gateway device to previously primary gateway device notice GR, previous primary gateway device deletes all routes directly obtained from user equipment.6. method according to claim 5, it is characterised in that described new primary gateway device is terminated by extending VRJRP protocol massages to previously primary gateway device notice GR.7. according to the method described in claim 1, it is characterised in that when new primary gateway device is set up BGP with user equipment and be connected, use the source port numbers different from the port numbers of previous primary gateway device connection.8. method according to claim 7, it is characterised in that also include：When primary gateway device and user equipment, which are set up, to be connected, primary gateway device notices it with user equipment to standby gateway device by extending VRRP agreements and sets up the source port number that bgp neighbor is used.9. a kind of gateway device, ^ includes BGP modules and VRRP modules；Characterized in that, also including VR P switches sensing module and switching notice module；Wherein,Described switching notice module gives VRRP switching sensing modules for noticing gateway device status handover request；Described VRRP switching sensing modules initiate bgp protocol connection request message according to the gateway device status handover request received to the BGP modules of user equipment, and the process that BGP is connected is set up in startup by the way of Graceful Restart GR with user equipment.10. the gateway device according to claim 9, it is characterised in that described switching notice module is embedded in VRRP inside modules.11. gateway device according to claim 9, it is characterised in that described VRRP switching sensing modules are embedded in the BGP inside modules of gateway device.12. the gateway device according to any one of claim 9 to 11, it is characterised in that the VRRP switchings sensing module is set up in message to be put into neighbours restarts mark, initiates the protocol connection request with user equipment.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510102085 CN1980224A (en) | 2005-12-01 | 2005-12-01 | Method and system for recovering business after apparatus state switching-over based on main and spare netgate |
| CN200510102085.5 | 2005-12-01 | ||
| PCT/CN2006/002080 WO2007062559A1 (en) | 2005-12-01 | 2006-08-16 | A method and gateway device for service recovery when master and slaving gateway devices switched |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101164307A true CN101164307A (en) | 2008-04-16 |
| CN100527716C CN100527716C (en) | 2009-08-12 |
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ID=38091859
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510102085 Pending CN1980224A (en) | 2005-12-01 | 2005-12-01 | Method and system for recovering business after apparatus state switching-over based on main and spare netgate |
| CN200680013610.9A Expired - Fee Related CN100527716C (en) | 2005-12-01 | 2006-08-16 | Method and gateway equipment for resuming service after switching status of main/standby gateway device |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510102085 Pending CN1980224A (en) | 2005-12-01 | 2005-12-01 | Method and system for recovering business after apparatus state switching-over based on main and spare netgate |
Country Status (2)
| Country | Link |
|---|---|
| CN (2) | CN1980224A (en) |
| WO (1) | WO2007062559A1 (en) |
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| US7944926B2 (en) | 2008-02-27 | 2011-05-17 | Huawei Technologies Co., Ltd. | Method and system for migrating a peer in a distributed BGP system |
| WO2012000439A1 (en) * | 2010-06-30 | 2012-01-05 | 中兴通讯股份有限公司 | Call processing method and media gateway |
| CN107769984A (en) * | 2017-12-04 | 2018-03-06 | 阳光凯讯(北京)科技有限公司 | A kind of inexpensive active and standby hot swapping system and method based on gateway |
| CN112073319A (en) * | 2019-06-10 | 2020-12-11 | 烽火通信科技股份有限公司 | Path switching method and system |
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| CN101616069B (en) * | 2008-06-23 | 2012-04-04 | 华为技术有限公司 | Information restoration method based on graceful restart and router |
| CN101340369B (en) * | 2008-08-14 | 2011-01-19 | 杭州华三通信技术有限公司 | Method and router for realizing virtual connection supported optimum restart |
| CN101494604B (en) * | 2009-03-04 | 2013-01-02 | 华为技术有限公司 | Migrating method and migrating device for VRF, and VRF distributed communication system |
| CN101695069B (en) * | 2009-10-22 | 2012-04-04 | 南京科远自动化集团股份有限公司 | Enetgw communication gateway |
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| US8879392B2 (en) | 2012-04-26 | 2014-11-04 | Hewlett-Packard Development Company, L.P. | BGP security update intercepts |
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| CN106656791A (en) * | 2015-10-30 | 2017-05-10 | 华为技术有限公司 | Device state switching method, device and system |
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| CN106911568B (en) * | 2017-02-24 | 2019-11-12 | 新华三技术有限公司 | BGP GR implementation method and device |
| CN109412943B (en) * | 2017-08-18 | 2022-04-05 | 中兴通讯股份有限公司 | SDN controller cluster flow processing method, device, equipment and storage medium |
| CN109067546B (en) * | 2018-09-19 | 2019-06-21 | 杭州数梦工场科技有限公司 | A kind of method, apparatus, equipment and computer storage medium managing safety certificate |
| CN112615914B (en) * | 2020-12-10 | 2022-07-05 | 中国电信股份有限公司江苏分公司 | Method for transmitting multicast hot standby table entries by using border gateway protocol |
| CN112953832B (en) * | 2021-02-20 | 2023-06-23 | 中国联合网络通信集团有限公司 | Processing method and device for MAC address table entry |
| CN116112348B (en) * | 2023-04-12 | 2023-06-27 | 广州河东科技有限公司 | Working mode switching method of intelligent gateway |
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- 2006-08-16 CN CN200680013610.9A patent/CN100527716C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7944926B2 (en) | 2008-02-27 | 2011-05-17 | Huawei Technologies Co., Ltd. | Method and system for migrating a peer in a distributed BGP system |
| WO2012000439A1 (en) * | 2010-06-30 | 2012-01-05 | 中兴通讯股份有限公司 | Call processing method and media gateway |
| CN107769984A (en) * | 2017-12-04 | 2018-03-06 | 阳光凯讯(北京)科技有限公司 | A kind of inexpensive active and standby hot swapping system and method based on gateway |
| CN107769984B (en) * | 2017-12-04 | 2020-08-28 | 阳光凯讯(北京)科技有限公司 | Low-cost active/standby hot switching system and method based on gateway |
| CN112073319A (en) * | 2019-06-10 | 2020-12-11 | 烽火通信科技股份有限公司 | Path switching method and system |
| CN112073319B (en) * | 2019-06-10 | 2022-04-29 | 烽火通信科技股份有限公司 | Path switching method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100527716C (en) | 2009-08-12 |
| CN1980224A (en) | 2007-06-13 |
| WO2007062559A1 (en) | 2007-06-07 |
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