CN102711234A - Method for synchronizing ARP (address resolution protocol) tables between master and slave VRRP (virtual router redundancy protocol) devices and VRRP device - Google Patents
Method for synchronizing ARP (address resolution protocol) tables between master and slave VRRP (virtual router redundancy protocol) devices and VRRP device Download PDFInfo
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Abstract
The invention discloses a method for synchronizing address resolution protocol (ARP) tables between master and slave virtual router redundancy protocol (VRRP) devices and a VRRP device. The method comprises the following steps: after ARP tables in three layers of examples or three layers of virtual private networks (L3VPN) corresponding to a VRRP protection group are packaged into a message by the master VRRP device, the message is transmitted to the slave VRRP device; the received message is analyzed by the slave VRRP device, and the carried ARP table is loaded on the ARP table corresponding to the locality. The VRRB device comprises an ARP table message generating module, an ARP table message transmitting module, an ARP table message analyzing module and an ARP table loading module. After adopting the method provided by the invention, the ARP tables between the master and slave VRRP devices are synchronous through the ARP table information message and are supported on the master and slave VRRP devices, and the method has no additional requirement about an access loop device.
Description
Technical field
The present invention relates to the data field; Relate in particular to a kind of active and standby VRRP (Virtual Router Redundancy Protocol; Virtual Router Redundancy Protocol) synchronous method and the VRRP equipment of the synchronous ARP of equipment room (Address Resolution Protocol, address resolution protocol) table.
Background technology
Along with LTE (Long Term Evolution; Long Term Evolution) development of technology such as; Convergence-level at the mobile retransmission net is introduced three-layer VPN (Virtual Private Network, VPN) technology, and can continue to adopt L2VPN (two-layer VPN) technology at Access Layer.In order to guarantee omnidistance MPLS (Multi-Protocol Label Switching, multiprotocol label switching) label forwarding, need on convergence-level equipment, open two or three layers of bridging functionality; Simultaneously, in order to improve the reliability of network, need on two bridge contact equipment, use the VRRP function.But, after VRRP switches,, VRRP do not have the ARP table on the equipment because being equipped with, need relearn ARP, and this will cause the packet loss of long period, can't satisfy the requirement of switching of carrier class 50ms.
Generally can take dual mode to solve this problem at present:
First access layer equipment is launched the two functions of sending out of ARP; Send ARP information to active and standby VRRP equipment simultaneously; Thereby reach the synchronous purpose of ARP table on active and standby VRRP equipment; But this method requires all access layer equipments all will support the two functions of sending out of ARP, if access layer equipment does not support this function just can't make in this way;
It two is to adopt static configuration ARP table to carry out synchronous mode, generally can be applied to the situation of the static L3VPN of employing (three-layer VPN) PTN (Packet Transport Network, Packet Transport Network) environment under.But when Access Layer has equipment that change takes place, need manual making amendment, workload is bigger, can only be applicable to the environment that topological structure is constant basically.
Summary of the invention
Technical problem to be solved by this invention provides the method and the VRRP equipment of the synchronous ARP table of a kind of active and standby VRRP equipment room, needs access layer equipment to support two of ARP or the pure manual static configuration of needs to carry out synchronous defective synchronously to overcome existing ARP table.
For addressing the above problem, the invention provides the method for the synchronous address resolution protocol of a kind of active and standby Virtual Router Redundancy Protocol (VRRP) equipment room (ARP) table, comprising:
After three layers of instance that the VRRP main equipment is corresponding with this VRRP protection group or the ARP gauge seal in the three-layer virtual special network (L3VPN) install in the message, send to VRRP and be equipped with on the equipment;
Said VRRP is equipped with the said message that equipment interconnection receives and resolves, and the ARP table that wherein carries is loaded in the local corresponding ARP table.
Further,
The said VRRP of sending to is equipped with on the equipment, specifically comprises:
Periodically sending to said VRRP is equipped with on the equipment.
Further,
The said VRRP of sending to is equipped with on the equipment, specifically comprises:
Heartbeat agreement through VRRP is transmitted passage and is sent to said VRRP and be equipped with on the equipment.
Further,
Said the ARP gauge seal is installed in the message, specifically comprises:
Said ARP is shown to be packaged into one or many messages through the mode of label length value (TLV).
Further,
Said ARP is shown to be packaged into one or many messages through the mode of TLV, specifically comprises:
The size information of said APR table is encapsulated in the heading of said message; For each list item in the said ARP table, wherein IP address information and corresponding MAC Address are encoded with the mode of TLV.
Correspondingly, the present invention also provides a kind of Virtual Router Redundancy Protocol (VRRP) equipment, comprising:
ARP(Address Resolution Protocol) statistical tables and reports literary compositions generation module is used at said equipment during as the VRRP main equipment, and the ARP gauge seal in three layers of instance that this VRRP protection group is corresponding or the three-layer virtual special network (L3VPN) installs in the message;
ARP statistical tables and reports literary composition sending module is used for that the said message that said ARP statistical tables and reports literary composition generation module generates is sent to VRRP and is equipped with equipment;
ARP statistical tables and reports literary composition parsing module is used for when said equipment is equipped with equipment as VRRP, the message that receives being resolved, and the ARP table that parsing is obtained sends to the ARP load-on module;
Said ARP table load-on module is used for being loaded into local corresponding ARP table with receiving the said ARP table that said ARP statistical tables and reports literary composition parsing module sends.
Further,
Said ARP statistical tables and reports literary composition sending module is used for that said message is sent to VRRP and is equipped with equipment, specifically comprises:
Said ARP statistical tables and reports literary composition sending module is used for that said message is periodically sent to said VRRP and is equipped with equipment.
Further,
Said ARP statistical tables and reports literary composition sending module is used for that said message is sent to VRRP and is equipped with equipment, specifically comprises:
Said ARP statistical tables and reports literary composition sending module is used for transmitting passage through the heartbeat agreement of VRRP and said message is sent to said VRRP is equipped with equipment.
Further,
Said ARP statistical tables and reports literary composition generation module is used for the ARP gauge seal is installed to message, specifically comprises:
Said ARP statistical tables and reports literary composition generation module is used for said ARP is shown to be packaged into one or many messages through the mode of label length value (TLV).
Further,
Said ARP statistical tables and reports literary composition generation module is used for said ARP is shown to be packaged into one or many messages through the mode of TLV, specifically comprises:
Said ARP statistical tables and reports literary composition generation module is used for the size information of said APR table is encapsulated in the heading at said message; Also be used for each list item, wherein IP address information and corresponding MAC Address encoded with the mode of TLV for said ARP table.
The present invention has following beneficial effect:
(1) the ARP table that carries out active and standby VRRP equipment room through ARP table infomational message only need be supported to get final product on active and standby VRRP equipment synchronously, and the access ring apparatus is not had extra demand;
(2) through regular synchronously; The ARP list item that makes VRRP be equipped with to have on the equipment on the VRRP main equipment is behind the masterslave switchover that VRRP takes place, owing to need not to relearn ARP table information; The packet loss time can effectively be reduced; Under the situation of having used fast detecting such as BFD (Bidirectional Forwarding Detection, two-way forwarding detects) for VRRP, can protection be reduced to less than 50ms switching time.
Description of drawings
Fig. 1 is the method flow diagram of the synchronous ARP table of active and standby VRRP equipment room in the embodiment of the invention;
Fig. 2 is an ARP table synchronizer networking diagram in the embodiment of the invention;
Fig. 3 is that ARP shows main equipment workflow diagram in the synchronizing process in the embodiment of the invention;
Fig. 4 is equipped with the equipment work flow chart in the ARP table synchronizing process in the embodiment of the invention.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, hereinafter will combine accompanying drawing that embodiments of the invention are elaborated.Need to prove that under the situation of not conflicting, embodiment among the application and the characteristic among the embodiment be combination in any each other.
The method of the synchronous ARP table of a kind of active and standby VRRP equipment room, as shown in Figure 1, comprising:
After three layers of instance that step 10:VRRP main equipment is corresponding with this VRRP protection group or the ARP gauge seal among the L3VPN install in the message, send to VRRP and be equipped with on the equipment; Wherein, the attribute of active and standby VRRP equipment is changed with the change of the attribute of VRRP equipment;
When concrete the realization, the process of sending message can be periodic, as whenever sending once at a distance from one minute.In addition, the transmission of message can be sent through the heartbeat agreement forwarding passage of VRRP.
When carrying out the message encapsulation, the VRRP main equipment can be packaged into one or many messages with the mode of ARP table through TLV (label-Length-Value, label length value).Wherein: in heading, include the size information of ARP table, i.e. the list item quantity of ARP table; For each list item in the ARP table, only need extract wherein IP address information and corresponding MAC Address, encode with the TLV mode; To the IP address, the tag value is desirable 00, and length is 4 bytes; Value is the binary numeral of IP address, to MAC Address, and tag value desirable 01; Length is 6 bytes, and value is the binary numeral of MAC Address.The corresponding ARP list item of each group, circulation is programmed into each bar ARP list item in the message according to the ARP table size in the heading.
Step 20:VRRP is equipped with the above-mentioned message that equipment interconnection receives and resolves, and the ARP table that wherein carries is loaded in the local corresponding ARP table, thereby reaches the synchronous purpose of two-shipper ARP table.
Below in conjunction with accompanying drawing and specific embodiment the present invention is done further detailed description.
In the present invention; The ARP table of two-shipper synchronously; Mainly be that the VRRP main equipment is used the heartbeat channel transfer and is equipped with on the equipment to VRRP through after regularly the ARP gauge seal of self being dressed up the ARP infomational message through after disposing active and standby ARP table synchronizer; Be equipped with in the ARP table that equipment is loaded into self after with packet parsing by VPPR, thereby reach the synchronous purpose of two-shipper ARP table.
Carry out the synchronous method of active and standby two-shipper ARP table as Fig. 2 is said, used in the present invention through ARP information table message mode, can be applied in and dispose two three-layer VPN bridge joints, and dispose on two bridge contact equipment of VRRP.This method only needs the support of two bridge contact equipment to get final product.
The synchronous enforcement of active and standby two-shipper ARP table mainly may further comprise the steps:
Step 1, on the bridging nodes that has disposed two or three layers of bridge joint and VRRP, the synchronous master/slave device of configuration ARP table, its activestandby state follows the change of VRRP activestandby state and changes;
Step 2, the regular ARP with in three layers of instance (comprising L3VPN) at VRRP place on this equipment of VRRP main equipment meeting show; Mode through TLV is packaged into one or many ARP table infomational messages, and the heartbeat agreement of using the heartbeat line is transmitted passage and relevant ARP table infomational message is sent to VRRP is equipped with on the equipment;
Step 3 is equipped with on the equipment at VRRP, the ARP that receives table infomational message is resolved, and the ARP table that parses is loaded in the local ARP table upgrades.
The workflow of as shown in Figure 3, VRRP main equipment comprises:
201, in the corresponding three layers of instance (comprising the L3VPN instance) of VRRP; The VRRP main equipment can regularly (generally can be provided with one minute; Time is less than the ageing time of ARP address) form of the table of the ARP in this instance information according to TLV encapsulated, be packaged into one or many ARP table infomational messages;
202, the VRRP main equipment can be used the heartbeat line of VRRP after the message encapsulation is accomplished, and ARP is shown infomational message send.
As shown in Figure 4, VRRP is equipped with the workflow of equipment, comprising:
301, receive ARP table infomational message and then resolve, obtain ARP table information;
302, will resolve the ARP table information that obtains, the normal flow according to ARP study is loaded into ARP and shows in three layers of instance of correspondence (comprising L3VPN) of synchronous slave node.
The synchronous VRRB equipment of a kind of active and standby two-shipper ARP comprises with lower module:
ARP statistical tables and reports literary composition generation module, ARP statistical tables and reports literary composition sending module, ARP statistical tables and reports literary composition parsing module and ARP table load-on module;
Said ARP statistical tables and reports literary composition generation module is used for the main equipment with VRRP, and the ARP table information in corresponding three layers of instance (comprising the L3VPN instance) through the TLV mode, is packaged into one or many ARP statistical tables and reports literary compositions;
Said ARP statistical tables and reports literary composition sending module is used for the main equipment at VRRP, with the ARP statistical tables and reports literary composition that generates, uses the heartbeat line of VRRP, sends on the subsequent use VRRP node.
Said ARP statistical tables and reports literary composition parsing module is used for being equipped with on the equipment at VRRP the ARP statistical tables and reports literary composition that receives is resolved, and obtains the ARP information on the main equipment that comprises in the message.
Said ARP load-on module is used for being equipped with equipment at VRRP, and the ARP table information that will from ARP statistical tables and reports literary composition, be resolved to is synchronized in the corresponding three layers of instance of this VRRP (the comprising L3VPN) instance.
Preferably,
Said ARP statistical tables and reports literary composition sending module is used for that said message is sent to VRRP and is equipped with equipment, specifically comprises:
Said ARP statistical tables and reports literary composition sending module is used for that said message is periodically sent to said VRRP and is equipped with equipment.
Preferably,
Said ARP statistical tables and reports literary composition sending module is used for that said message is sent to VRRP and is equipped with equipment, specifically comprises:
Said ARP statistical tables and reports literary composition sending module is used for transmitting passage through the heartbeat agreement of VRRP and said message is sent to said VRRP is equipped with equipment.
Preferably,
Said ARP statistical tables and reports literary composition generation module is used for the ARP gauge seal is installed to message, specifically comprises:
Said ARP statistical tables and reports literary composition generation module is used for said ARP is shown to be packaged into one or many messages through the mode of label length value (TLV).
Preferably,
Said ARP statistical tables and reports literary composition generation module is used for said ARP is shown to be packaged into one or many messages through the mode of TLV, specifically comprises:
Said ARP statistical tables and reports literary composition generation module is used for the size information of said APR table is encapsulated in the heading at said message; Also be used for each list item, wherein IP address information and corresponding MAC Address encoded with the mode of TLV for said ARP table.
One of ordinary skill in the art will appreciate that all or part of step in the said method can instruct related hardware to accomplish through program, said program can be stored in the computer-readable recording medium, like read-only memory, disk or CD etc.Alternatively, all or part of step of the foregoing description also can use one or more integrated circuits to realize.Correspondingly, each the module/unit in the foregoing description can adopt the form of hardware to realize, also can adopt the form of software function module to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
The above is merely the preferred embodiments of the present invention, is not to be used to limit protection scope of the present invention.According to summary of the invention of the present invention; Also other various embodiments can be arranged; Under the situation that does not deviate from spirit of the present invention and essence thereof, those of ordinary skill in the art are when making various corresponding changes and distortion according to the present invention, and are all within spirit of the present invention and principle; Any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the method for the synchronous address resolution protocol of an active and standby Virtual Router Redundancy Protocol (VRRP) equipment room (ARP) table comprises:
After three layers of instance that the VRRP main equipment is corresponding with this VRRP protection group or the ARP gauge seal in the three-layer virtual special network (L3VPN) install in the message, send to VRRP and be equipped with on the equipment;
Said VRRP is equipped with the said message that equipment interconnection receives and resolves, and the ARP table that wherein carries is loaded in the local corresponding ARP table.
2. the method for claim 1 is characterized in that:
The said VRRP of sending to is equipped with on the equipment, specifically comprises:
Periodically sending to said VRRP is equipped with on the equipment.
3. according to claim 1 or claim 2 method is characterized in that:
The said VRRP of sending to is equipped with on the equipment, specifically comprises:
Heartbeat agreement through VRRP is transmitted passage and is sent to said VRRP and be equipped with on the equipment.
4. the method for claim 1 is characterized in that:
Said the ARP gauge seal is installed in the message, specifically comprises:
Said ARP is shown to be packaged into one or many messages through the mode of label length value (TLV).
5. method as claimed in claim 4 is characterized in that:
Said ARP is shown to be packaged into one or many messages through the mode of TLV, specifically comprises:
The size information of said APR table is encapsulated in the heading of said message; For each list item in the said ARP table, wherein IP address information and corresponding MAC Address are encoded with the mode of TLV.
6. a Virtual Router Redundancy Protocol (VRRP) equipment comprises:
ARP(Address Resolution Protocol) statistical tables and reports literary compositions generation module is used at said equipment during as the VRRP main equipment, and the ARP gauge seal in three layers of instance that this VRRP protection group is corresponding or the three-layer virtual special network (L3VPN) installs in the message;
ARP statistical tables and reports literary composition sending module is used for that the said message that said ARP statistical tables and reports literary composition generation module generates is sent to VRRP and is equipped with equipment;
ARP statistical tables and reports literary composition parsing module is used for when said equipment is equipped with equipment as VRRP, the message that receives being resolved, and the ARP table that parsing is obtained sends to the ARP load-on module;
Said ARP table load-on module is used for being loaded into local corresponding ARP table with receiving the said ARP table that said ARP statistical tables and reports literary composition parsing module sends.
7. equipment as claimed in claim 6 is characterized in that:
Said ARP statistical tables and reports literary composition sending module is used for that said message is sent to VRRP and is equipped with equipment, specifically comprises:
Said ARP statistical tables and reports literary composition sending module is used for that said message is periodically sent to said VRRP and is equipped with equipment.
8. like claim 6 or 7 described equipment, it is characterized in that:
Said ARP statistical tables and reports literary composition sending module is used for that said message is sent to VRRP and is equipped with equipment, specifically comprises:
Said ARP statistical tables and reports literary composition sending module is used for transmitting passage through the heartbeat agreement of VRRP and said message is sent to said VRRP is equipped with equipment.
9. equipment as claimed in claim 6 is characterized in that:
Said ARP statistical tables and reports literary composition generation module is used for the ARP gauge seal is installed to message, specifically comprises:
Said ARP statistical tables and reports literary composition generation module is used for said ARP is shown to be packaged into one or many messages through the mode of label length value (TLV).
10. equipment as claimed in claim 9 is characterized in that:
Said ARP statistical tables and reports literary composition generation module is used for said ARP is shown to be packaged into one or many messages through the mode of TLV, specifically comprises:
Said ARP statistical tables and reports literary composition generation module is used for the size information of said APR table is encapsulated in the heading at said message; Also be used for each list item, wherein IP address information and corresponding MAC Address encoded with the mode of TLV for said ARP table.
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| CN114070781A (en) * | 2020-08-05 | 2022-02-18 | 北京威努特技术有限公司 | Data communication method, device and system and computer equipment |
| CN114070781B (en) * | 2020-08-05 | 2023-08-08 | 北京威努特技术有限公司 | Data communication method, device, system and computer equipment |
| CN113794684A (en) * | 2021-08-10 | 2021-12-14 | 新华三信息安全技术有限公司 | Message processing method and device |
| WO2024001553A1 (en) * | 2022-06-30 | 2024-01-04 | 中兴通讯股份有限公司 | Routing publishing method, electronic device and computer-readable storage medium |
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