CN1878085A - State detection method based on main and backup Ethernet interface - Google Patents
State detection method based on main and backup Ethernet interface Download PDFInfo
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- CN1878085A CN1878085A CNA2005100890837A CN200510089083A CN1878085A CN 1878085 A CN1878085 A CN 1878085A CN A2005100890837 A CNA2005100890837 A CN A2005100890837A CN 200510089083 A CN200510089083 A CN 200510089083A CN 1878085 A CN1878085 A CN 1878085A
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- 238000001514 detection method Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 22
- 230000007257 malfunction Effects 0.000 claims description 17
- 230000004044 response Effects 0.000 claims description 15
- 230000005540 biological transmission Effects 0.000 abstract description 9
- 230000006855 networking Effects 0.000 description 13
- 238000004891 communication Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
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Abstract
The invention discloses a condition detecting method based on main and auxiliary Ethernet interfaces, which is characterized by the following: detecting interface condition according to ARP report for main and auxiliary interfaces separately; switching the equipment interfaces to reinforce the reliability of network transmission; detecting accident among route equipments; improving the wholeness of accident detection.
Description
Technical field
The present invention relates to the network communications technology field, be specifically related to a kind of condition detection method based on active and standby Ethernet interface.
Background technology
In traditional data communication field, it between the communication equipment netted connection, arrive the another one communication equipment from a communication equipment a plurality of reachable paths are arranged, if path failure, after carrying out routing convergence by OSPF Routing Protocols such as (ospfs), use the another one path to carry out communication between two communication equipments.Because the speed of this routing convergence is slow, fault recovery speed is slow, generally greater than 30 seconds, and the fault of appearance differs and is detected timely surely, so this is generally unavailable in field of telecommunications.
At field of telecommunications, particularly in NGN (next generation network) field,, generally use the networking of active and standby interface reliability, shown in accompanying drawing 1, accompanying drawing 2, accompanying drawing 3 for guaranteeing professional reliability.
In Fig. 1, Fig. 2, Fig. 3, access device is meant the equipment that can be linked into IP network by Ethernet interfaces such as FE/GE, as media gateway, SGW, soft switch etc., the R among the figure is a router, L3 is a layer 3 ethernet switch, and L2 is a layer 2 ethernet switch.Access device goes out active and standby two Ethernet interfaces, by active and standby two ethernet links, is linked into one or two R/L3/L2 respectively.Any points such as interface of interface on the transmission path at access device main interface place, ethernet link, R/L3/L2 break down, and the business in the access device main interface can be switched to and be equipped with on the interface, thereby, avoid traffic lost.
At present, the method that the active and standby interface fault of access device detects is: be equipped with the interface physical layer and close, promptly main interface physical layer UP is equipped with interface physical layer Down, make main interface can normally receive and dispatch message, the opposite equip. R/L3/L2 of access device can think that the main interface of access device is effective, thereby, the IP message that is sent to the access device side is forwarded to main interface, access device is sent to the IP message of IP network side, only send from main interface, like this, access device and R/L3/L2 just can cooperatings.Active and standby interface detects active and standby interface fault by the UP/Down signal of physical layer.
In said method, because the interface physical layer that is equipped with of access device is closed, so, can not detecting fully, whether interface has fault, like this, when main interface breaks down, open interface fully again, being equipped with interface also may be fault, and, active and standby interface only detects active and standby interface fault by the UP/Down signal of physical layer, not only to the fault detect more than the physical layer less than, to the fault of a certain section physical layer in the networking of crossing over transmission also detect less than, even under the situation of direct connection networking, if being sent to fault of access device and receiving to normally, present this active and standby interface fault detection method detects to come out yet.
In sum, existing this fault detection method makes that fully interface is capable of illusory, does not really play the effect of active and standby interface backup, thereby, can cause active and standby interface inverting failure, make service disconnection.
Summary of the invention
The objective of the invention is to, a kind of condition detection method based on active and standby Ethernet interface is provided, utilize the ARP message to detect the fault of active and standby interface, realized that the raising fault detect is comprehensive, improve the purpose of service reliability.
For achieving the above object, a kind of condition detection method based on active and standby Ethernet interface provided by the invention comprises: active and standby interface detects Interface status according to the ARP message respectively.
Described method specifically comprises:
A, open active and standby interface physical layer signal, and dispose the IP address of active and standby interface;
B, send the ARP request message from active and standby interface to the opposite end routing device according to the IP address of active and standby interface;
C, determine active and standby Interface status according to physical layer signal, the arp response message of active and standby interface.
Opposite end routing device among the described step b comprises: router, layer 3 ethernet switch, layer 2 ethernet switch.The opposite end routing device that described active and standby interface is corresponding different respectively, or the corresponding same opposite end of described active and standby interface routing device; And the interface of the routing device of described main interface correspondence has identical IP address with the interface of the routing device that is equipped with the interface correspondence.
The MAC Address of described main interface is a virtual mac address, and the described MAC Address that is equipped with interface is the physics MAC Address.
Described step c specifically comprises:
Judge the arp response message that the physical layer signal of active/standby interface, active/standby interface receive;
If the physical layer UP of active/standby interface and active/standby interface receive the arp response message in the interval at the fixed time, determine that active/standby interface is in normal condition;
If the physical layer DOWN of active/standby interface or active/standby interface do not receive the arp response message in the interval at the fixed time, determine that active/standby interface is in malfunction.
Described method also comprises: when determining that interface is in malfunction fully, and alarm and record trouble state information;
Determine that main interface is in malfunction and is equipped with interface when being in normal condition, carries out active and standby interface inverting.
The step of described active and standby interface inverting specifically comprises: the IP address and the MAC Address that exchange active and standby interface.
Described step b specifically comprises: send the ARP request message from the active/standby interface that is in malfunction to the opposite end routing device;
And described method also comprises: when the active/standby interface that is in malfunction receives the arp response message, determine that active/standby interface reverts to normal condition.
Described method also comprises:
During being equipped with interface and reverting to normal condition behind the described active and standby interface inverting, carry out active and standby interface inverting.
Description by technique scheme as can be known, the present invention need not to make special cooperation and revises on the routing device of opposite end, just can realize the active and standby interface detection of access device, and correspondingly carries out active and standby interface inverting, has strengthened the reliability of Network Transmission; Because the widespread popularity of ARP agreement makes simple, the easy row of method of the present invention, and, can both detect to all faults between the routing device R/L2/L3 for access device; Thereby realized that by technical scheme provided by the invention the raising fault detect is comprehensive, improved the purpose of service reliability.
Description of drawings
Fig. 1 is active and standby interface reliability networking schematic diagram one;
Fig. 2 is active and standby interface reliability networking schematic diagram two;
Fig. 3 is active and standby interface reliability networking schematic diagram three;
Fig. 4 is an active and standby Interface status migration schematic diagram of the present invention.
Embodiment
Core of the present invention is: active and standby interface detects Interface status according to the ARP message respectively.
Based on core concept of the present invention technical scheme provided by the invention is further described below.
The invention provides a kind of simple and effective active and standby Interface status and detect and active and standby interface inverting method, active and standby interface wherein can be the primary, spare Ethernet interface in the access device that inserts IP network.
Active and standby interface in the access device is connected with routing device such as router, layer 3 ethernet switch, layer 2 ethernet switch etc. in the IP network respectively, routing device method of attachment in active and standby interface and the IP network can be the connected mode in the dual-homing networking in the field of telecommunications, shown in accompanying drawing 1,2,3.
At first, the physical layer signal that is equipped with interface of access device of the present invention is opened, and then, need be in the active and standby interface configuration of access device different IP addresses is as IP1, IP2.
When the networking mode that adopts as shown in Figure 1, can between two layer 3 ethernet switch L3, dispose VLAN-Trunk (VLAN binding) and VRRP (virtual redundancy router protocol), promptly the IP address of the interface corresponding with the active and standby interface of access device on two L3 is divided among the same VLAN, and shares identical IP address ip 3.
When the networking mode that adopts as shown in Figure 2, can on the interface of two routers of the active and standby interface correspondence of access device, dispose VRRP, the interface of above-mentioned two routers externally uses identical IP address ip 3.
When the networking mode that adopts as shown in Figure 3, the interface on two R/L3 of the active and standby interface correspondence of access device can be divided in same VLAN, the interface on above-mentioned two R/L3 externally uses identical IP address ip 3.
The present invention does not limit the connected mode of dual-homing networking in the field of telecommunications, as adopting distortion networking mode based on above three kinds of connected modes, be connected other L2, the physical layer transmission equipment etc. crossed over before with R/L3/L2 as access device, no matter adopt which kind of connected mode, the configuration of the present invention's active and standby interface on access device, active and standby interface fault detection method, active and standby interface fault reverse method are basic identical.
Active and standby interface configuration in the access device of Fig. 1, Fig. 2, Fig. 3 has different IP addresses, is that IP1, the IP address that is equipped with interface are IP2 as the IP address of main interface, and IP1, IP2 and R/L3/L2 go up the IP3 of configuration at the same network segment.
The main interface of access device, be equipped with interface and all dispose MAC Address, for improving the speed of switching of active and standby interface, can be in configuration virtual MAC Address on the main interface, be equipped with configures physical MAC Address on the interface, dispose identical opposite end routing device on the active and standby interface, be the IP address of default gateway R/L3/L2, i.e. IP3.
After access device started, active and standby interface physical layer all was in the UP state, and active and standby interface uses different IP addresses according to above-mentioned configuration, and the IP address that disposes identical opposite end routing device.
Main interface uses the virtual mac address and the IP1 of configuration, is equipped with interface and uses physics MAC Address and IP2, and active and standby interface all sends the ARP request message, up to the corresponding relation of IP3 that gets access to corresponding routing device and MAC.
The corresponding relation of the IP address of the active and standby interface of ARP request message record access device that the opposite end routing device can send according to active and standby interface, MAC Address, physical port number, but, the corresponding relation difference at active and standby interface of record, the corresponding relation of main interface as record is IP1, virtual mac address, main interface port numbers, and the corresponding relation that is equipped with interface of record is IP2, physics MAC Address, be equipped with the interface end slogan.
After ARP resolved and finishes, access device is distribution service on the IP1 address of main interface only, and distribution service on the IP2 address that is equipped with interface is not equipped with interface and does not manage business, and promptly to being sent to the message of IP network side, all the main interface from access device sends.
To being sent to the message of access device side from the IP network side, R/L3/L2 is the main interface that the message correctly of main interface IP1 address is forwarded to access device according to the forwarding relations I P1, the virtual MAC that generate, main interface port numbers with destination address.
Active and standby Interface status of the present invention detects and is meant the detection to this section of routing device interface path of the active and standby interface from access device, active and standby ethernet link.Active and standby dual-homing networking can only guarantee the reliability in path between access device and the R/L3, and the reliability beyond the R/L3/L2 is guaranteed by data communication network.
The condition detection method of active and standby interface is: the state that detects active and standby interface from interface physical layer, other aspects.
Interface physical layer state: generally can directly detect on hardware such as photosignal, when being UP as the interface physical layer, then the interface physical layer is in normal condition, when the interface physical layer is DOWN, is equipped with the interface physical layer and is in malfunction.
The state of other aspect: detect by sending ARP Request message, the ARP agreement is the standard of RFC 0826 protocol definition, be used for resolving according to peer IP address the MAC Address of opposite end, according to the regulation of ARP, the interface that is in normal condition must real-time response ARP Request message.
After the interface that is in normal condition is meant interface physical layer UP, can correctly receive and dispatch the state of message, under this state, active/standby interface can adopt timed sending or continue to send or at random mode such as transmission send ARP Request request message, if fixed length in the time active/standby interface receive ARP Response message, then active/standby interface still is in normal condition; If active/standby interface continuous several times does not all receive ARPResponse message, promptly at interval interior at the fixed time active/standby interface does not receive ARP Response message always, the perhaps physical layer Down of active/standby interface, then active/standby interface changes malfunction over to by normal condition.The state transition diagram of active and standby interface as shown in Figure 4.
By above-mentioned Interface status testing process, if determine that main interface changes malfunction over to by normal condition, should alarm, and when interface is in normal condition fully, carry out active and standby interface inverting; If definite interface that is equipped with changes malfunction over to by normal condition, then only alarm and write down the relevant information that is equipped with interface fault, be equipped with the interface physical layer as record and be the DOWN state, do not receive ARP Response message etc. in the interval at the fixed time always.
Active and standby interface is nonserviceabled, also to adopt timed sending or continue to send or at random mode such as transmission send ARP Request message, receive ARPResponse message again if be in the active and standby interface of malfunction, then active and standby interface changes normal condition over to by malfunction, otherwise, still be in malfunction.
The reversed process of active and standby interface of the present invention is: the IP address of the active and standby interface of access device is exchanged, making fully, interface conversion is a main interface, new main interface behind the active and standby interface inverting uses the virtual mac address of former main interface, newly is equipped with interface and uses the former physics MAC Address that is equipped with interface.Access device sends service message to the opposite end routing device on new main interface.
Because the corresponding relation of IP address and MAC Address is constant behind the active and standby interface inverting, so, opposite end routing device R/L3/L2 revises the corresponding relation of MAC Address and physical port number by MAC address learning, just can send to new main interface to the IP message correctly that is sent to the access device direction.
After carrying out active and standby interface inverting, new active and standby interface need continue to adopt timed sending or continue to send or at random mode such as transmission send ARP Request message, continue to detect Interface status, if former main interface receives ARP Response message, after promptly determining former main interface fault recovery, can carry out active and standby interface inverting process once more according to user's control or according to the control of system, data service be refunded the former main interface of access device again.
Description by technique scheme as can be known, the present invention need not to make special cooperation and revises on routing device, just can realize the active and standby interface detection method and the active and standby interface inverting method of access device, has strengthened the reliability of Network Transmission; Because the widespread popularity of ARP agreement makes simple, the easy row of method of the present invention, and, can both detect to all faults between the R/L2/L3 for access device.
Though described the present invention by embodiment, those of ordinary skills know, the present invention has many distortion and variation and do not break away from spirit of the present invention, and the claim of application documents of the present invention comprises these distortion and variation.
Claims (10)
1, a kind of condition detection method based on active and standby Ethernet interface is characterized in that, comprising:
Active and standby interface detects Interface status according to the ARP message respectively.
2, a kind of condition detection method based on active and standby Ethernet interface as claimed in claim 1 is characterized in that described method specifically comprises:
A, open active and standby interface physical layer signal, and dispose the IP address of active and standby interface;
B, send the ARP request message from active and standby interface to the opposite end routing device according to the IP address of active and standby interface;
C, determine active and standby Interface status according to physical layer signal, the arp response message of active and standby interface.
3, a kind of condition detection method based on active and standby Ethernet interface as claimed in claim 2 is characterized in that, the opposite end routing device among the described step b comprises: router, layer 3 ethernet switch, layer 2 ethernet switch.
4, a kind of condition detection method based on active and standby Ethernet interface as claimed in claim 2 is characterized in that, the opposite end routing device that described active and standby interface is corresponding different respectively, or the corresponding same opposite end of described active and standby interface routing device;
And the interface of the routing device of described main interface correspondence has identical IP address with the interface of the routing device that is equipped with the interface correspondence.
5, a kind of condition detection method based on active and standby Ethernet interface as claimed in claim 2 is characterized in that, the MAC Address of described main interface is a virtual mac address, and the described MAC Address that is equipped with interface is the physics MAC Address.
6, a kind of condition detection method based on active and standby Ethernet interface as claimed in claim 2 is characterized in that described step c specifically comprises:
Judge the arp response message that the physical layer signal of active/standby interface, active/standby interface receive;
If the physical layer UP of active/standby interface and active/standby interface receive the arp response message in the interval at the fixed time, determine that active/standby interface is in normal condition;
If the physical layer DOWN of active/standby interface or active/standby interface do not receive the arp response message in the interval at the fixed time, determine that active/standby interface is in malfunction.
7, a kind of condition detection method based on active and standby Ethernet interface as claimed in claim 6 is characterized in that described method also comprises:
When determining that being equipped with interface is in malfunction, alarm and record trouble state information;
When definite main interface is in malfunction and interface is in normal condition fully, carry out active and standby interface inverting.
8, a kind of condition detection method based on active and standby Ethernet interface as claimed in claim 7 is characterized in that the step of described active and standby interface inverting specifically comprises:
Exchange the IP address and the MAC Address of active and standby interface.
9, a kind of condition detection method based on active and standby Ethernet interface as claimed in claim 6 is characterized in that described step b specifically comprises:
Send the ARP request message from the active/standby interface that is in malfunction to the opposite end routing device;
And described method also comprises:
When the active/standby interface that is in malfunction receives the arp response message, determine that active/standby interface reverts to normal condition.
10, a kind of condition detection method based on active and standby Ethernet interface as claimed in claim 9 is characterized in that described method also comprises:
During being equipped with interface and reverting to normal condition behind the described active and standby interface inverting, carry out active and standby interface inverting.
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| CNB2005100890837A CN100466540C (en) | 2005-08-05 | 2005-08-05 | State detection method based on main and backup Ethernet interface |
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| CNB2005100890837A CN100466540C (en) | 2005-08-05 | 2005-08-05 | State detection method based on main and backup Ethernet interface |
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| CN100466540C CN100466540C (en) | 2009-03-04 |
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