CN105554175A - ARP backup method in PW (Pseudo-wires) redundancy scene - Google Patents

ARP backup method in PW (Pseudo-wires) redundancy scene Download PDF

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Publication number
CN105554175A
CN105554175A CN201510990959.9A CN201510990959A CN105554175A CN 105554175 A CN105554175 A CN 105554175A CN 201510990959 A CN201510990959 A CN 201510990959A CN 105554175 A CN105554175 A CN 105554175A
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CN
China
Prior art keywords
arp
primary
network equipment
backup
spare
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CN201510990959.9A
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Chinese (zh)
Inventor
付华楷
高璐晓
刘程
陈佳
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WUHAN FIBERHOME TECHNICAL SERVICES CO., LTD.
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Fiberhome Telecommunication Technologies Co Ltd
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Priority to CN201510990959.9A priority Critical patent/CN105554175A/en
Publication of CN105554175A publication Critical patent/CN105554175A/en
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00Network arrangements or network protocols for addressing or naming
    • H04L61/10Mapping of addresses of different types; Address resolution
    • H04L61/103Mapping of addresses of different types; Address resolution across network layers, e.g. resolution of network layer into physical layer addresses or address resolution protocol [ARP]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00Network-specific arrangements or communication protocols supporting networked applications
    • H04L67/10Network-specific arrangements or communication protocols supporting networked applications in which an application is distributed across nodes in the network
    • H04L67/1095Network-specific arrangements or communication protocols supporting networked applications in which an application is distributed across nodes in the network for supporting replication or mirroring of data, e.g. scheduling or transport for data synchronisation between network nodes or user terminals or syncML

Abstract

The invention discloses an ARP backup method in PW redundancy scene, comprising: respectively setting ARP hot backup modules on master and secondary B devices, wherein the master and secondary B devices are connected through a direct connection port, ARPs are synchronized between the master and secondary B devices in real time or in batches through a UDP communication mode; enabling ARP backup functions on the interfaces of the master and secondary B devices connected with an A device; initiatively sending notification messages to secondary and master network devices for notifying ARP item updating conditions through the master and secondary ARP hot backup modules by the master and secondary network devices according to dynamically learned ARP items; when a B device operating on the ARP backup group generates a fault, forwarding the traffic to be sent to a user to a backup B device according to the respectively recorded ARP information by the B device, wherein the device packages traffic messages according to the respectively recorded ARP information and sends to a host. According to the invention, the business is rapidly and effectively switched; and the network stability and security are increased.

Description

ARP backup method under a kind of PW redundancy scene
Technical field
The present invention relates to network communication technology field, be specifically related to ARP backup method under a kind of PW redundancy scene.
Background technology
The application of tradition private network has impelled the growing of the performance of enterprises, but traditional private network is difficult to meet the requirement of enterprise to the aspect such as flexibility, fail safe, economy, autgmentability of network.This promotes a kind of generation of new alternative scheme---in existing IP network, simulate traditional private network, i.e. virtual private network (VirtualPrivateNetwork).The switching technology that MPLS (Multi-ProtocolLabelSwitch) is high as a kind of cost performance and professional ability is strong, utilize the virtual private network business that MPLS switching technology can very easily realize based on IP technology, meet the demand of Virtual Private Network extensibility and management.
MPLSVPN has L2VPN and L3VPN two kinds of modes; Wherein, L2VPN is the Layer 2 data of transparent transmission user in an mpls network, and L2VPN application technology comprises VPWS (VirtualPrivateWireService) and VPLS (VirtualPrivateLanService) two kinds.
At the Access Layer of wireless backhaul network, general use VPWS realizes service bearer, PW (Pseudo-wires) is a kind of implementation that carrier network provides VPWS to serve for user, a PW can be set up as public network tunnel between PE (operator edge device) and PE, CE (customer edge) can be communicated with by PE with CE like this, by many PW, a LAN is formed to client, thus form a L2VPN.And in order to provide the self-healing ability of network, general by disposing one or more PW for subsequent use for two communication nodes, primary, spare PW forms a redundancy PW group, the PW of redundancy PW group can carry out traffic forwarding, whenever only transmit flow with a PW, the network equipment being configured with redundancy PW group can Sampling network mistake be switched to rapidly by flow to continue the service that provides on PW for subsequent use, namely when primary PW lost efficacy, is switched to fast by flow on PW for subsequent use and transmits.When equipment requirement by flow switchback to primary PW time, if primary PW is effective, must flow switchback be carried out.
Fig. 1 is the networking schematic diagram under mobile Internet return network scene, is described foregoing below in conjunction with Fig. 1, and BTS (BaseTransceiverStation, base station) is Customer Premises Network equipment; A equipment is customer access equipment, is generally the data communications equipment supporting VPWS function, for the access user side network equipment; B equipment is wireless traffic side gateway, is equivalent to the network equipment for the purpose of convergence-level data communications equipment RNC (RadioNetworkController, radio network controller); Uplink service refers to the business between BTS to RNC, and downlink business refers to the business between RNC to BTS.
Wherein, BTS is by AC (AttachmentCircuit, place in circuit) access A equipment, primary, spare PW is set up by L2 interface between A equipment and two B equipment, L2VE and L3VE interface is bound by B Equipments Setting VEGroup (Virtual Ethernet group), realizes the termination of L2 business.Under normal circumstances, uplink service and downlink business are carried by primary PW; After primary PW breaks down (link failure or primary B device looses power), uplink service and downlink business switch to PW for subsequent use and carry; After fault recovery, uplink service and downlink business return in primary PW.When disposing VPNFRR or VPNECMP technology in L3 network, A equipment only has service traffics with the primary website of B equipment, primary B equipment has ARP learning process and arp entry, only just can have a small amount of service traffics with A equipment, have a small amount of arp entry.If there is link failure or primary B device looses power in primary PW, B equipment for subsequent use just needs the ARP re-starting ARP study or need to learn other, uplink and downlink business can not realize switching fast, so just easily cause business packet loss, in addition, send switch between master and slave at PW, again during switchback, arp entry before former host apparatus lost after restarting, needs again to send whole ARP study, can cause business packet loss equally.
Summary of the invention
Technical problem to be solved by this invention is when disposing VPNFRR or VPNECMP technology in L3 network, there is no arp entry above the stand-by equipment of wireless traffic side gateway or only have part arp entry, when host apparatus failover is to stand-by equipment, need to learn the ARP of disappearance, and primary, spare equipment again switchback time, arp entry before former host apparatus lost after restarting, need again to learn whole ARP, cause the problem causing business packet loss in ARP learning process.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is to provide ARP backup method under a kind of PW redundancy scene, comprises the following steps:
The primary, spare network equipment arranges primary, spare ARP hot standby module respectively, and the primary, spare network equipment is connected by a direct-connected mouth, adopt reliable UDP communication mode between the hot standby module of primary, spare ARP, by ARP with the form of the hot standby message of ARP real-time or batch be synchronized to the other side;
On the primary, spare network device interface be connected with customer access equipment, the hot standby module of enable ARP;
The primary, spare network equipment, by the arp entry of dynamic learning, initiatively sends notification packet to standby, the primary network equipment by the hot standby module of primary, spare ARP, informs arp entry update status;
When the network equipment run in ARP backup group breaks down, this network equipment needs the ARP information according to self record, by the traffic forwarding of user of giving to be sent to backup network equipment, customer flow is encapsulated traffic messages according to user's ARP information of self record by backup network equipment, sends to main frame.
In the above-mentioned methods, the hot standby module of described primary, spare ARP is also provided with ARP and remains ageing time and ARP source identification two key parameters, and ARP remains ageing time and is used for carrying out burin-in process to arp entry; The Dynamic ARP that ARP source identification is used for identifying that our station learns or back up the Dynamic ARP of coming from other website, and the hot standby module of primary, spare ARP only by the arp entry real-time update of self dynamic learning to other website.
In the above-mentioned methods, the hot standby message of described ARP comprises:
Sequence of message field, being used for coupling request command and one receives the response;
Command field, comprises REQUEST_ALL, REQUEST_ALONE, UPDATE, ACK tetra-command words; Wherein, the ARP that REQUEST_ALL is used for asking opposite equip. all backs up; REQUEST_ALONE is for asking all ARP backups under certain interface of opposite equip.; The ARP that local terminal newly learns for primary B equipment by UPDATE is advertised to B equipment for subsequent use; ACK is used for confirmation solicited message;
Error code field, responds abnormal ARP backup request for enable ARP hot-backup function one end network equipment to the other end;
Groupid field, for representing ARP backup group ID, interface joins in different ARP backup groups according to consistent rule by the active and standby network equipment of enable ARP hot-backup function, and represents grouping with Groupid;
Arp entry digital section, for representing arp entry number entrained in this message;
Arp entry content field, this field is made up of several arp entrys.
In the above-mentioned methods, when L3 network adopts VPNFRR technology, the hot standby module of the enable primary, spare ARP of the primary, spare network equipment, the primary, spare network equipment needs to send request mutually all arp entrys of acquisition the other side, and all Dynamic ARP items for information that the primary network equipment is learnt simultaneously are synchronized on backup network equipment.
In the above-mentioned methods, when L3 network adopts VPNECMP technology, the hot standby module of the enable primary, spare ARP of the primary, spare network equipment, send request mutually between the primary, spare network equipment and obtain all arp entrys of the other side, the Dynamic ARP items for information of study is synchronized on standby, the primary network equipment by the primary, spare network equipment respectively.
In the above-mentioned methods, when the primary, spare network equipment complete Dynamic ARP entry synchronous after, failed network device restarts, failed network device sends request to normal job network equipment and obtains all arp entrys of the other side, after normal job network equipment receives request, arp entry in this backup group is sent data cached and data sent in buffering area all to empty, then by the whole Batch sendings of Dynamic ARP entry all in this network equipment to the failed network device of restarting.
In the above-mentioned methods, when the primary, spare network equipment complete Dynamic ARP entry synchronous after, after primary, spare network equipment dynamic learning to arp entry, by by UPDATE message by dynamic learning to arp entry send to standby, the primary network equipment, standby, the primary network equipment upgrades principle according to arp entry and upgrades local arp entry information.
In the above-mentioned methods, when the primary, spare network equipment complete Dynamic ARP entry synchronous after, when the primary, spare network equipment has arp entry aging, this aging arp entry by asynchronous on opposite equip..
In the above-mentioned methods, when main or backup network equipment initiatively to standby or the primary network equipment obtains all arp entrys of certain ARP backup group time, after the standby or primary network equipment receives request REQUEST_ALL message, if do not configure this backup group on this equipment, then reply an error code and be greater than the ACK message of 0 to main or backup network equipment, record this error message after main or backup network equipment receives this error code information, and continue to send REQUEST_ALL request with the fixed cycle.
In the above-mentioned methods, when having new interface to join in the ARP backup group of master or backup network equipment after active and standby ARP hot standby module work a period of time of the primary, spare network equipment, new interface joins after in backup group by main or backup network equipment, first will send REQUEST_ALONE message, ask the arp entry information of corresponding interface in standby or the primary network equipment; If have corresponding interface to add backup group in the standby or primary network equipment, then reply the ACK message that an error code is 0; If do not have corresponding interface to add backup group, then reply the ACK message that an error code is greater than 0.
The present invention adopts the hot standby module of ARP to carry out batch synchronization and real-time synchronization to the ARP between B equipment main website and standby station; solve when PW redundancy protecting because Dynamic ARP entry learns the problem that causes the business long period to be interrupted; not only realize switching fast and effectively of business, and increase stability, the fail safe of network.
Accompanying drawing explanation
Fig. 1 is the mobile Internet return network schematic diagram that the present invention relates to;
Fig. 2 be the active and standby B equipment that the present invention relates to the hot standby module of ARP between circulate a notice of message format;
Fig. 3 be the present invention be applied in L3 network adopt VPNFRR technology time scene schematic diagram, arrow is direction of the traffic;
Fig. 4 is the synchronous flow chart of arp entry of the embodiment of the present invention one;
Fig. 5 is the scene schematic diagram that the present invention is applied in that L3 network adopts VPNECMP technology, and arrow is direction of the traffic;
Fig. 6 is the synchronous flow chart of arp entry of the embodiment of the present invention two active and standby B equipment;
Fig. 7 be in the present invention when B equipment home site and standby website complete Dynamic ARP entry synchronous after, the flow chart restarted after home site fault;
Fig. 8 be in the present invention when B equipment home site and standby website complete Dynamic ARP entry synchronous after, the flow chart restarted after standby site disasters;
Fig. 9 is that in the present invention, B equipment home site carries out the synchronous flow chart of Dynamic ARP entry;
Figure 10 is that in the present invention, B equipment carries out the synchronous flow chart of Dynamic ARP entry for website;
Figure 11 be in the present invention B equipment home site initiatively to the flow chart of all arp entrys of standby certain ARP backup group of station for acquiring;
Figure 12 adds new interface to the flow chart in the ARP backup group of home site when B equipment home site with after standby website ARP hot standby module work a period of time in the present invention.
Embodiment
In order to solve when PW redundancy protecting because the study of Dynamic ARP entry causes the business long period to be interrupted, cause the problem of business packet loss, the present invention adopt the hot standby module of ARP to B equipment main website and standby stand between ARP carry out batch synchronization and real-time synchronization.And introduce ARP residue ageing time and ARP source identification two key parameters by the hot standby module of this ARP, wherein, ARP remains ageing time and is used for carrying out burin-in process to arp entry, when calculating arp entry residue ageing time, we suppose that the hot standby module of home site ARP is sent to the standby hot standby module time time delay of website ARP and can ignores; ARP source identification, for identifying the Dynamic ARP that our station learns or backing up the Dynamic ARP of coming from other website, only has the ARP of our station point dynamic learning just to need real-time update to arrive other website, thus prevents ARP from backing up loop generation.
Below in conjunction with Figure of description and specific embodiment, the present invention is described in detail.
ARP backup method under a kind of PW redundancy scene provided by the invention, is applied to scene as shown in Figure 1, comprises the following steps:
Step 10, the hot standby module of primary, spare ARP is set respectively on primary, spare B equipment, and primary, spare B equipment is connected by a direct-connected mouth, makes the hot standby message of ARP be undertaken alternately by the direct-connected mouth between primary, spare B equipment; Adopt reliable UDP communication mode that real-time for ARP or batch is synchronized to the other side between the hot standby module of primary, spare ARP.
In the present invention, when " in real time " refers to that ARP has a renewal (arp entry increases newly, or when arp entry MAC, interface change) need this ARP to back up to the other side; When " in batches " referring to that the other side requires to back up the ARP of our station, the Dynamic ARP that our station learn is backed up to the other side by the mode of batch by our station, and is carrying out in two equipment mutually backed up, and the hot standby module of ARP does not have active and standby dividing, equal.So in actual applications, if time a link has occurred that problem is switched to an other link, avoid Dynamic ARP study, thus accelerated the convergence time of whole link.
In the present invention, the hot standby module of primary, spare ARP is also provided with ARP and remains ageing time and ARP source identification two key parameters, ARP remains ageing time and is used for carrying out burin-in process to arp entry, the Dynamic ARP that ARP source identification is used for identifying that our station learns or back up the Dynamic ARP of coming from other website; The hot standby module of primary, spare ARP of the present invention only by the arp entry real-time update of self dynamic learning to other website, back up loop generation to prevent ARP.
The hot standby message of ARP of the present invention is realize the intercommunication message in ARP hot-backup function process in ARP backup group between each B equipment, and the hot standby message format of ARP, as shown in Figure 2, comprising:
Sequence of message field, being used for coupling request command or one receives the response;
Command field, comprises REQUEST-ALL, REQUEST_ALONE, UPDATE, ACK tetra-command words; Wherein, the ARP that REQUEST-ALL is used for asking opposite equip. (B equipment primary or for subsequent use) all backs up; REQUEST_ALONE is for asking all ARP backups under certain interface of opposite equip.; The ARP that local terminal newly learns for primary B equipment by UPDATE is advertised to B equipment for subsequent use; ACK is used for confirmation solicited message;
Error code field, one end network equipment for enable ARP hot-backup function responds abnormal ARP backup request to the other end;
Groupid field, for representing ARP backup group ID, interface joins in different ARP backup groups according to consistent rule by the active and standby network equipment (active and standby B equipment) of enable ARP hot-backup function, and represents grouping with Groupid;
Arp entry digital section, for representing arp entry number entrained in this message;
Arp entry content field, this field is made up of several arp entrys.
Step 20, on the primary, spare B equipment interface be connected with A equipment, enable ARP backup functionality.
Step 30, the primary, spare network equipment, by the arp entry of dynamic learning, initiatively send notification packet to standby, the primary network equipment by the hot standby module of primary, spare ARP, inform arp entry update status.
When step 40, the primary B equipment run in ARP backup group break down, this B equipment needs the ARP information according to self record, gives B equipment for subsequent use by the traffic forwarding of the user of giving to be sent.If B equipment for subsequent use receives to be sent to the flow of user, the user's ARP information according to self record is encapsulated as traffic messages, and is forwarded by traffic messages.After the equipment broken down in ARP backup group recovers, this ARP backup group (primary, spare B equipment) can continue the ARP information of timing interactive user.Thus achieve the quick switching of business, avoid packet loss.
Embodiment one.
As shown in Figure 3, for the present invention be applied in L3 network adopt VPNFRR technology time scene schematic diagram, service traffics are passed through from B equipment home site, B equipment home site have the arp entry information of all dynamic learnings of base station; The standby station of B equipment is upper because do not have flow to pass through, so B equipment is for arp entry information website not having dynamic learning.In this kind of scene, after home site and standby website enable the hot standby module of respective ARP, active and standby website needs to send mutually REQUEST_ALL request and obtains all arp entrys of the other side, and home site needs all Dynamic ARP items for information learnt to be synchronized on standby website; Because standby website there is no the arp entry of dynamic learning, so only need to reply ACK acknowledge message, represent that receiving the other side asks, and without batch backup arp entry, as shown in Figure 4.
Embodiment two.
As shown in Figure 5, for the present invention is applied in the scene schematic diagram that L3 network adopts VPNECMP technology, a service traffics part can pass through from B equipment home site, and another part can pass through from B equipment for website, the arp entry information that such home site and standby website have partial dynamic to learn.In this kind of scene, after home site and standby website enable the hot standby module of respective ARP, send mutually REQUEST_ALL request between home site and standby website and obtain all arp entrys of the other side, home site needs the Dynamic ARP items for information of study to be synchronized on standby website, and standby website needs the Dynamic ARP items for information learnt to be synchronized on home site, as shown in Figure 6.
Embodiment three.
Fig. 7, Fig. 8 be respectively when B equipment home site and standby website complete Dynamic ARP entry synchronous after, the flow chart restarted after B equipment home site, standby site disasters.In this kind of scene, after fault website (home site or standby website) normal startup, fault website sends REQUEST_ALL request to normal working terminal (standby website or home site), after normal working terminal receives REQUEST_ALL request, arp entry in this backup group is sent data cached and data sent in buffering area all to empty, then by the whole Batch sendings of Dynamic ARP entry all in this station to the fault website of restarting.
Embodiment four.
Fig. 9, Figure 10 are respectively B equipment home site, standby website carries out the synchronous flow chart of Dynamic ARP entry, after home site dynamic learning to arp entry, by UPDATE message by dynamic learning to arp entry send to standby website, standby website upgrades principle according to arp entry and upgrades local arp entry information; After standby website dynamic learning to arp entry, also by UPDATE message by dynamic learning to arp entry send to home site, home site upgrades principle according to arp entry and upgrades local arp entry information.
In the present invention, when B equipment home site and standby website complete Dynamic ARP entry synchronous after, time active and standby website has arp entry aging, this aging arp entry will be asynchronous on opposite end website (for website and home site).
Embodiment five.
If Figure 11 is that B equipment home site is initiatively to the flow chart of all arp entrys of standby certain ARP backup group of station for acquiring, when B equipment home site initiatively sends all arp entry of REQUEST_ALL acquisition request for certain backup group (such as group_id is 5) to standby website, after standby website receives request message, if find this website does not configure this backup group, then reply an error code and be greater than the ACK message of 0 to home site, record error message after master receives this error code information with website, and continue to send REQUEST_ALL request with the fixed cycle; If this website there is this backup group, then process by embodiment one and embodiment three.
The flow process that B equipment initiatively obtains all arp entrys of certain ARP backup group to home site for website is identical with said process, does not repeat them here.
Embodiment six.
This embodiment is when B equipment home site and adds new interface after standby website ARP hot standby module work a period of time to home site or for the scene in the ARP backup group of website, be described for home site in this scene, as shown in figure 12, when in home site, new interface being joined in backup group, first REQUEST_ALONE message will be sent, the arp entry information of corresponding interface in the standby website of request; If have corresponding interface to add backup group in standby website, then reply the ACK message that an error code is 0, if do not have corresponding interface to add backup group, then reply the ACK message that an error code is greater than 0.
In the present invention, after B equipment home site and standby website ARP hot-backup function work a period of time, need some interface to remove from hot standby group of the ARP of home site and standby website, the ARP information of the interface removed no longer will carry out synchronized update.
In the present invention, when there is primary, spare dish in primary, spare B equipment (the active and standby website of B equipment), primary, spare B equipment complete Dynamic ARP entry synchronous after, after the primary dish of B equipment main or for subsequent use is out of order, the dish for subsequent use of B equipment main or for subsequent use rises to primary dish, now, the new primary dish risen can't send the arp entry batch backup request of REQUEST_ALL to opposite end (standby or primary B equipment).
In the present invention, when B equipment home site and standby website are in the process of synchronous dynamic arp entry, after home site or standby website restart because of fault, standby website or home site are only synchronized part home site or the arp entry information for website, may have lost the arp entry information of part, after home site or standby website normally start, carry out arp entry synchronizing information with reference to embodiment three.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.

Claims (10)

1. an ARP backup method under PW redundancy scene, is characterized in that, comprise the following steps:
The primary, spare network equipment arranges primary, spare ARP hot standby module respectively, and the primary, spare network equipment is connected by a direct-connected mouth, adopt UDP communication mode between the hot standby module of primary, spare ARP, by ARP with the form of the hot standby message of ARP real-time or batch be synchronized to the other side;
On the primary, spare network device interface be connected with customer access equipment, the hot standby module of enable ARP;
The primary, spare network equipment, by the arp entry of dynamic learning, initiatively sends notification packet to standby, the primary network equipment by the hot standby module of primary, spare ARP, informs arp entry update status;
When the network equipment run in ARP backup group breaks down, this network equipment needs the ARP information according to self record, by the traffic forwarding of user of giving to be sent to backup network equipment, customer flow is encapsulated traffic messages according to user's ARP information of self record by backup network equipment, sends to main frame.
2. the method for claim 1, is characterized in that, the hot standby module of described primary, spare ARP is also provided with ARP and remains ageing time and ARP source identification two key parameters, and ARP remains ageing time and is used for carrying out burin-in process to arp entry; The Dynamic ARP that ARP source identification is used for identifying that our station learns or back up the Dynamic ARP of coming from other website, and the hot standby module of primary, spare ARP only by the arp entry real-time update of self dynamic learning to other website.
3. the method for claim 1, is characterized in that, the hot standby message of described ARP comprises:
Sequence of message field, being used for coupling request command and one receives the response;
Command field, comprises REQUEST_ALL, REQUEST_ALONE, UPDATE, ACK tetra-command words; Wherein, the ARP that REQUEST_ALL is used for asking opposite equip. all backs up; REQUEST_ALONE is for asking all ARP backups under certain interface of opposite equip.; The ARP that local terminal newly learns for primary B equipment by UPDATE is advertised to B equipment for subsequent use; ACK is used for confirmation solicited message;
Error code field, responds abnormal ARP backup request for enable ARP hot-backup function one end network equipment to the other end;
Groupid field, for representing ARP backup group ID, interface joins in different ARP backup groups according to consistent rule by the active and standby network equipment of enable ARP hot-backup function, and represents grouping with Groupid;
Arp entry digital section, for representing arp entry number entrained in this message;
Arp entry content field, this field is made up of several arp entrys.
4. the method for claim 1, it is characterized in that, when L3 network adopts VPNFRR technology, the hot standby module of the enable primary, spare ARP of the primary, spare network equipment, the primary, spare network equipment needs to send request mutually all arp entrys of acquisition the other side, and all Dynamic ARP items for information that the primary network equipment is learnt simultaneously are synchronized on backup network equipment.
5. the method for claim 1, it is characterized in that, when L3 network adopts VPNECMP technology, the hot standby module of the enable primary, spare ARP of the primary, spare network equipment, send request mutually between the primary, spare network equipment and obtain all arp entrys of the other side, the Dynamic ARP items for information of study is synchronized on standby, the primary network equipment by the primary, spare network equipment respectively.
6. the method for claim 1, it is characterized in that, when the primary, spare network equipment complete Dynamic ARP entry synchronous after, failed network device restarts, failed network device sends request to normal job network equipment and obtains all arp entrys of the other side, after normal job network equipment receives request, arp entry in this backup group is sent data cached and data sent in buffering area all to empty, then by the whole Batch sendings of Dynamic ARP entry all in this network equipment to the failed network device of restarting.
7. method as claimed in claim 3, it is characterized in that, when the primary, spare network equipment complete Dynamic ARP entry synchronous after, after primary, spare network equipment dynamic learning to arp entry, by by UPDATE message by dynamic learning to arp entry send to standby, the primary network equipment, standby, the primary network equipment upgrades principle according to arp entry and upgrades local arp entry information.
8. the method for claim 1, is characterized in that, when the primary, spare network equipment complete Dynamic ARP entry synchronous after, when the primary, spare network equipment has arp entry aging, this aging arp entry by asynchronous on opposite equip..
9. method as claimed in claim 3, it is characterized in that, when main or backup network equipment initiatively to standby or the primary network equipment obtains all arp entrys of certain ARP backup group time, after the standby or primary network equipment receives request REQUEST_ALL message, if do not configure this backup group on this equipment, then reply an error code and be greater than the ACK message of 0 to main or backup network equipment, record this error message after main or backup network equipment receives this error code information, and continue to send REQUEST_ALL request with the fixed cycle.
10. method as claimed in claim 3, it is characterized in that, when having new interface to join in the ARP backup group of master or backup network equipment after active and standby ARP hot standby module work a period of time of the primary, spare network equipment, new interface joins after in backup group by main or backup network equipment, first will send REQUEST_ALONE message, ask the arp entry information of corresponding interface in standby or the primary network equipment; If have corresponding interface to add backup group in the standby or primary network equipment, then reply the ACK message that an error code is 0; If do not have corresponding interface to add backup group, then reply the ACK message that an error code is greater than 0.
CN201510990959.9A 2015-12-23 2015-12-23 ARP backup method in PW (Pseudo-wires) redundancy scene Pending CN105554175A (en)

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CN106231002A (en) * 2016-07-22 2016-12-14 杭州华三通信技术有限公司 A kind of method and device safeguarding ARP table
CN107277187A (en) * 2017-06-07 2017-10-20 烽火通信科技股份有限公司 The system and method for ARP Hot Spare Fast synchronizations
CN107835126A (en) * 2017-10-19 2018-03-23 盛科网络(苏州)有限公司 A kind of message forwarding method and system
CN110572317A (en) * 2019-07-16 2019-12-13 烽火通信科技股份有限公司 Method and system for realizing dynamic ARP hot backup in telecommunication network
WO2020125645A1 (en) * 2018-12-18 2020-06-25 华为技术有限公司 Proxy gateway for processing message for hot standby system, and communication method

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CN103001868A (en) * 2012-12-31 2013-03-27 杭州华三通信技术有限公司 Method and device used for synchronous ARP (Address Resolution Protocol) list item of virtual router redundancy protocol backup set

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Publication number Priority date Publication date Assignee Title
CN106231002A (en) * 2016-07-22 2016-12-14 杭州华三通信技术有限公司 A kind of method and device safeguarding ARP table
CN107277187A (en) * 2017-06-07 2017-10-20 烽火通信科技股份有限公司 The system and method for ARP Hot Spare Fast synchronizations
CN107277187B (en) * 2017-06-07 2019-09-06 烽火通信科技股份有限公司 The system and method for ARP warm back-up Fast synchronization
CN107835126A (en) * 2017-10-19 2018-03-23 盛科网络(苏州)有限公司 A kind of message forwarding method and system
WO2020125645A1 (en) * 2018-12-18 2020-06-25 华为技术有限公司 Proxy gateway for processing message for hot standby system, and communication method
CN110572317A (en) * 2019-07-16 2019-12-13 烽火通信科技股份有限公司 Method and system for realizing dynamic ARP hot backup in telecommunication network

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