CN101931590A - Method and device for integrating routing - Google Patents
Method and device for integrating routing Download PDFInfo
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- CN101931590A CN101931590A CN2010102673741A CN201010267374A CN101931590A CN 101931590 A CN101931590 A CN 101931590A CN 2010102673741 A CN2010102673741 A CN 2010102673741A CN 201010267374 A CN201010267374 A CN 201010267374A CN 101931590 A CN101931590 A CN 101931590A
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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
Abstract
The invention discloses a method and a device for integrating routing. In the method and the device, partial forwarding information and an outlet index in the routing table can be acquired by transmitting a routing table, a platform software table is searched according to the outlet index so as to acquire outlet and encapsulation information, and complete forwarding information can be integrated according to the routing table and the information in the platform software table. Through the method and the device, the forwarding efficiency can be remarkably improved without secondary searching a hardware table or secondary routing, and the method and the device can ensure that two-level forwarding can be realized on equipment which does not accept repeated table searching, and reduce the equipment cost on the premise of providing the same function.
Description
Technical field
The present invention relates to the communications field, be specifically related to a kind of integrating routing method and apparatus.
Background technology
Continuous development along with Internet and intranet, three layers of vpn (Visual-Private-Network, Virtual Private Network), ECMP (Equal-Cost Multi-Path, equal cost multipath), FRR various technology such as (Fast ReRoute, heavy-routes fast) are used more and more widely.The demand of two-stage ecmp/frr networking is also more and more general.As shown in Figure 1: three layers of vpn networking, far-end purpose CE (Custom Edge Router, Customer Edge router) carries out dual homed, 2 PE of far-end (Provider Edge Router, provider edge router) equipment backs up, the public network that arrives main PE equipment has carried out load balancing again, and so local PE goes up just needs to support multistage ecmp/frr routing forwarding.Existing technology mainly is to rely on repeatedly to search hardware forwarding table, at first looks into routing table according to purpose ip address, if find that outlet is ecmp or frr, then obtains first order outlet index, looks into hardware list according to this index; If find pointed mouthful of list item or ecmp or frr, then explanation is multistage nested, obtains second level index, looks into the ecmp/frr hardware list again one time, obtains real outlet information and encapsulates and transmit.
There is following defective in above-mentioned technology contents:
1, hardware does not support secondary to table look-up or the equipment of secondary route can't be realized the routing forwarding of above-mentioned nested networking;
2, support repeatedly to table look-up or the equipment of route, hardware cost is higher, and need repeatedly search hardware list, and obviously forward efficiency is low.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of integrating routing method and apparatus, guarantees also can realize on the equipment of not supporting repeatedly to table look-up the two-stage forwarding, and improves forward efficiency.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of integrating routing method, this method comprises:
Routing table issues, and obtains wherein part forwarding information and outlet index; According to outlet index search platform software table, obtain outlet and packaging information;
Go out complete forwarding information according to information integrated in routing table and the platform software register.
Search at the described of platform software table, be based on routing table and carry out that circulation searching realizes, comprising:
According to the index relative that is indexed to secondary index by one-level, all secondary indexs under the circulation searching one-level index obtain the platform software table according to this.
Describedly integrate out complete forwarding information and comprise:
From the platform software table that each circulation time obtained, obtain outlet and packaging information, and, finally integrate out complete forwarding information in conjunction with the described part forwarding information that from routing table, obtains.
The index relative of foundation of being based on described outlet index realizes that described index relative comprises:
Address resolution protocol arp is to the index relative of quick heavy-route/equal cost multipath frr/ecmp/ route; Frr is to the index relative of route; Ecmp is to the index relative of route; Public network frr is to the index relative of Virtual Private Network vpnecmp/vpn frr; Public network ecmp is to the index relative of vpn ecmp/vpn frr.
This method further comprises the routing update processing, provides the routing update information that can be used to reference for integrating out complete forwarding information;
Described routing update is jumped the arp change by next and is caused, or is caused by the change of frr group, or is caused by the change of ecmp group.
A kind of integrating routing device, this device comprise routing table processing unit, platform software list processing unit, integral unit; Wherein,
Described routing table processing unit is used to carry out routing table and issues, and obtains wherein part forwarding information and outlet index;
Described platform software list processing unit is used to obtain the resulting outlet index of routing table processing unit, and searches the platform software table in view of the above, obtains outlet and packaging information;
Described integral unit is used to obtain the platform software table that forwarding information that the routing table processing unit obtained and platform software list processing unit are found, and goes out complete forwarding information according to information integrated in routing table of obtaining and the platform software register.
Described platform software list processing unit is searched at the described of platform software table, is based on routing table and carries out that circulation searching realizes; Described platform software list processing unit is used for when searching the platform software table:
According to the index relative that is indexed to secondary index by one-level, all secondary indexs under the circulation searching one-level index obtain the platform software table according to this.
When described integral unit is integrated out complete forwarding information, be used for:
From the platform software table that each circulation time obtained, obtain outlet and packaging information, and, finally integrate out complete forwarding information in conjunction with the described part forwarding information that from routing table, obtains.
The index relative of foundation of being based on described outlet index realizes that described index relative comprises:
Arp is to the index relative of frr/ecmp/ route; Frr is to the index relative of route; Ecmp is to the index relative of route; Public network frr is to the index relative of vpn ecmp/vpn frr; Public network ecmp is to the index relative of vpn ecmp/vpn frr.
This device further comprises the routing update unit, is used for: carry out routing update and the routing update information that can be used to reference is provided for described integral unit;
Described routing update is jumped the arp change by next and is caused, or is caused by the change of frr group, or is caused by the change of ecmp group.
The inventive method and device no longer need secondary to look into hardware list or secondary route, and forward efficiency is improved significantly; And can guarantee on the equipment of not supporting repeatedly to table look-up, also can realize the two-stage forwarding, providing under the identical functions prerequisite, reduced equipment cost.
Description of drawings
Fig. 1 is a two-stage ecmp/frr networking application scenarios schematic diagram;
Fig. 2 is the two-stage ecmp/frr integrating routing flow chart of one embodiment of the invention;
Fig. 3 is the address resolution protocol (arp) of one embodiment of the invention, the adduction relationship schematic diagram between the frr/ecmp route;
Fig. 4 jumps the routing update flow chart that the arp change causes for next of one embodiment of the invention;
Fig. 5 changes the routing update flow chart that causes for the frr group of one embodiment of the invention;
Fig. 6 changes the routing update flow chart that causes for the ecmp group of one embodiment of the invention;
Fig. 7 is the integrating routing general flow chart of one embodiment of the invention;
Fig. 8 is the integrating routing installation drawing of one embodiment of the invention.
Embodiment
In general, can issue routing table by platform software, all right searching platform software register, and integrate out complete outlet information according to routing table and platform software register, again the outlet information of integrating out once is handed down to driving to write hardware list, in subsequent applications, hardware only need can be finished two-stage ecmp/frr and transmit at the hardware list process of once tabling look-up.
The aforesaid operations thinking can may further comprise the steps:
1) routing table issues, and obtains wherein part forwarding information and outlet index.
2) according to outlet index search platform software table, obtain outlet and packaging information.
3) go out complete forwarding information according to information integrated in routing table and the platform software register.
Need to prove that described outlet index comprises ecmp index or frr index.And,, then directly finish if in the platform software table, search less than the outlet index.Complete forwarding information generally includes: purpose ip, and mask, vpn id, the physics outbound port, the outgoing interface index, next jumps ip address, purpose medium access control mac, outgoing label etc.
When practical application, concrete integrating routing flow process as shown in Figure 2, this flow process may further comprise the steps:
Step 201: upper-layer protocol issues the routing table interpolation or triggers routing update.
Step 202: judge whether the route type of exports is next common jumping, if enter step 203; Otherwise, enter step 204.
Step 203: look into the platform software table according to next jumping ip and three layer interface index, obtain purpose mac and physics outbound port.
Step 204: according to outlet frr index or ecmp index search platform software table, judge whether to search successfully, if success enters step 205; Otherwise, return failure and process ends.
Step 205: the value that i is set is zero.
Step 206: whether judge i less than m, if less than, enter step 208; Otherwise, enter step 207.
Step 207: complete forwarding informations such as route prefix information, outlet information are added to driving.
Particularly, route prefix information comprises purpose ip, mask, vpn id etc., and outlet information comprises next jumping ip, physics outbound port, purpose mac, outgoing interface index, next jumping vpn id etc.
Step 208: whether the outlet of judging i next jumping exists secondary index, if exist, enters step 210; Otherwise, enter step 209.
Step 209: the platform software table looked in ip address and three layer interface index according to i next jumping, obtain purpose mac and physics outbound port.
Step 210:, judge whether to search successfully according to outlet frr index or ecmp index search platform software table; If search successfully, enter step 211; Otherwise, return failure and process ends.
Step 211: the value that j is set is zero.
Step 212: whether judge j less than n, if less than, enter step 213; Otherwise, enter step 215.
Step 213: the platform software table looked in ip address and three layer interface index according to j next jumping, obtain purpose mac and physics outbound port.
Step 214: the j that adds up, return step 212.
Step 215: the i that adds up, return step 206.
By above-mentioned flow process as seen,, be based on routing table and carry out that circulation searching realizes at searching of platform software table, as: according to the index relative that is indexed to secondary index by one-level, all secondary indexs under the circulation searching one-level index obtain the platform software table according to this.Based on above-mentioned circulation searching mode, follow-up when integrating out complete forwarding information, then can from the platform software table that each circulation time is obtained before, obtain outlet and packaging information, and, finally integrate out complete forwarding information in conjunction with the part forwarding information that from routing table, obtains.
There is index relative between each index in the above-mentioned flow process, can be in conjunction with the adduction relationship between arp, frr/ecmp and the route, the above-mentioned index relative of application drawing 3 explanations.Referring to Fig. 3, common next jump the ecmp/frr that arp variation can make the route of quoting it or quote it and change, arp changes needs to trigger relevant frr/ecmp and routing update; In like manner, the frr/ecmp variation can make vpn frr, vpn ecmp or the route of quoting it change, need to trigger relevant vpn frr, vpn ecmp and routing update, vpn frr or vpnecmp variation can make the route outlet of quoting it change, and need to trigger relevant routing update.Therefore need to set up the index relative opposite with the adduction relationship direction: promptly arp is to the index relative of frr/ecmp/ route; Frr is to the index relative of route; Ecmp is to the index relative of route; Public network frr is to the index relative of vpn ecmp/vpn frr; Public network ecmp is to the index relative of vpn ecmp/vpn frr.
Can the more new relation between route, next jumping arp, ecmp/frr group be described in conjunction with above-mentioned index.
Particularly, agreement can't all next of perception be jumped the arp variation, need be changed by present integrating routing module responds arp, and the relevant routing update of triggering drives.The moving routing update process that causes of common next saltus step as shown in Figure 4, flow process shown in Figure 4 may further comprise the steps:
Step 401: agreement issues arp and adds, deletes or upgrade and operate.
Step 402: judge whether can find the subnet route of quoting this arp,, enter step 403 if can find according to index relative; Otherwise, enter step 404.
Step 403: specifically handle according to action type.As: if it is arp adds or upgrade operation, then will complete outlet information information integrated and write driving with the route prefix of finding.If the arp deletion action then can the outlet of subnet route be set to transmitted to CPU, reintegrate the outlet of subnet route again behind the wait arp information completely.
Step 404: judge according to index relative whether to find the ecmp group of quoting arp,, enter step 405 if can find; Otherwise, enter step 406.
Step 405: carry out the routing update flow process according to the ecmp index.
Step 406: judge according to index relative whether to find the frr group of quoting arp,, enter step 407 if can find; Otherwise, process ends.
Step 407: carry out the routing update flow process according to the frr index.
Frr group changes the routing update process that causes as shown in Figure 5, and flow process shown in Figure 5 may further comprise the steps:
Step 501: judge whether to upgrade operation, if enter step 502 into the frr group; Otherwise, enter step 510.
Step 502: judge to find platform frr software list item,, enter step 503 if can find according to the frr index; Otherwise, process ends.
Step 503: judge according to index relative whether to find vpn frr or the vpnecmp that quotes this frr group,, enter step 504 if can find; Otherwise, enter step 507.
Step 504: judge to find the platform software list item,, enter step 505 if can find according to vpn frr/vpn ecmp index; Otherwise, enter step 507.
Step 505: judge to find the route a that quotes vpn frr or vpn ecmp,, enter step 506 if can find according to index relative; Otherwise, enter step 507.
Step 506: integrate complete forwarding information, the route a that quotes vpn frr/vpn ecmp is upgraded driving.
Step 507: judge whether and to find the route b that quotes this frr group according to index relative, and in the time finding, enter step 508.
Step 508: if frr renewal or interpolation operation are then integrated complete route b information and upgraded driving; If the frr deletion action, then temporary transient outlet with route b is changed to send cpu, and upgrades driving.Process ends.
Step 510: judge whether to add operation, if enter step 503 into the frr group; Otherwise, enter step 520.
Step 520: judge whether into frr group deletion action, if enter step 507; Otherwise, process ends.
The routing update process that ecmp group change causes as shown in Figure 6, flow process shown in Figure 6 may further comprise the steps:
Step 601: judge whether to upgrade operation, if enter step 602 into the Ecmp group; Otherwise, enter step 610.
Step 602: judge to find platform Ecmp software list item,, enter step 603 if can find according to the Ecmp index; Otherwise, process ends.
Step 603: judge according to index relative whether to find vpn frr or the vpnecmp that quotes this Ecmp group,, enter step 604 if can find; Otherwise, enter step 607.
Step 604: judge to find the platform software list item,, enter step 605 if can find according to vpn frr/vpn ecmp index; Otherwise, enter step 607.
Step 605: judge to find the route a that quotes vpn frr or vpn ecmp,, enter step 606 if can find according to index relative; Otherwise, enter step 607.
Step 606: integrate the information of complete route a and upgrade driving.
Step 607: judge whether and to find the route b that quotes this Ecmp group according to index relative, and in the time finding, enter step 608.
Step 608: if Ecmp upgrades or adds operation, information and the renewal of then integrating complete route b drive; If the Ecmp deletion action, then temporary transient outlet with route b is changed to send cpu, and upgrades driving.Process ends.
Step 610: judge whether to add operation, if enter step 603 into the Ecmp group; Otherwise, enter step 620.
Step 620: judge whether into Ecmp group deletion action, if enter step 607; Otherwise, process ends.
Describe as can be known in conjunction with above flow process, the operation thinking of integrating routing of the present invention can be represented as shown in Figure 7.Referring to Fig. 7, Fig. 7 is the integrating routing general flow chart of one embodiment of the invention, and this flow process may further comprise the steps:
Step 710: routing table issues, and obtains wherein part forwarding information and outlet index.
Step 720:, obtain outlet and packaging information according to outlet index search platform software table.
Step 730: become complete forwarding information according to information integrated in routing table and the platform software register.
In order to guarantee that above-mentioned flow process and operation thinking can realize smoothly, can carry out setting as shown in Figure 8.Referring to Fig. 8, Fig. 8 is the integrating routing installation drawing of one embodiment of the invention, and this device comprises continuous routing table processing unit, platform software list processing unit, integral unit, can also comprise the routing update unit that links to each other with integral unit.
When concrete the application, the routing table processing unit can carry out routing table and issue, and obtains wherein part forwarding information and outlet index; Platform software list processing unit then can obtain the resulting outlet index of routing table processing unit, and searches the platform software table in view of the above, obtains outlet and packaging information.Integral unit can access the platform software table that forwarding information that the routing table processing unit obtained and platform software list processing unit are found, and goes out complete forwarding information according to information integrated in routing table of obtaining and the platform software register.
In addition, the routing update unit can carry out the routing update processing extremely shown in Figure 6 as Fig. 4, and result is notified to integral unit, for integral unit provides the routing update information that can be used to reference when integrating out complete forwarding information.
Need to prove,,, so just can safeguard this adduction relationship as long as the adduction relationship that this unit need be used between arp, the frr/ecmp route carries out associative operation at any unit in each unit shown in Figure 8.The concrete operations that each unit shown in Figure 8 can be realized are the detailed description in aforementioned flow process, does not repeat them here.In addition, for traditional one-level ecmp/frr networking or common networking, aforementioned flow process is suitable equally.
In sum as seen, no matter be method or device, two-stage ecmp/frr integrating routing technology of the present invention compared with prior art, has following beneficial effect:
1, no longer need secondary to look into hardware list or secondary route, forward efficiency is improved significantly.
2, guarantee on the equipment of not supporting repeatedly to table look-up, also can realize the two-stage forwarding,, reduced equipment cost providing under the identical functions prerequisite.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. an integrating routing method is characterized in that, this method comprises:
Routing table issues, and obtains wherein part forwarding information and outlet index; According to outlet index search platform software table, obtain outlet and packaging information;
Go out complete forwarding information according to information integrated in routing table and the platform software register.
2. method according to claim 1 is characterized in that, searches at the described of platform software table, is based on routing table and carries out that circulation searching realizes, comprising:
According to the index relative that is indexed to secondary index by one-level, all secondary indexs under the circulation searching one-level index obtain the platform software table according to this.
3. method according to claim 2 is characterized in that, describedly integrates out complete forwarding information and comprises:
From the platform software table that each circulation time obtained, obtain outlet and packaging information, and, finally integrate out complete forwarding information in conjunction with the described part forwarding information that from routing table, obtains.
4. according to each described method of claim 1 to 3, it is characterized in that described outlet index is based on that the index relative of foundation realizes, described index relative comprises:
Address resolution protocol arp is to the index relative of quick heavy-route/equal cost multipath frr/ecmp/ route; Frr is to the index relative of route; Ecmp is to the index relative of route; Public network frr is to the index relative of Virtual Private Network vpnecmp/vpn frr; Public network ecmp is to the index relative of vpn ecmp/vpn frr.
5. method according to claim 4 is characterized in that, this method further comprises the routing update processing, provides the routing update information that can be used to reference for integrating out complete forwarding information;
Described routing update is jumped the arp change by next and is caused, or is caused by the change of frr group, or is caused by the change of ecmp group.
6. an integrating routing device is characterized in that, this device comprises routing table processing unit, platform software list processing unit, integral unit; Wherein,
Described routing table processing unit is used to carry out routing table and issues, and obtains wherein part forwarding information and outlet index;
Described platform software list processing unit is used to obtain the resulting outlet index of routing table processing unit, and searches the platform software table in view of the above, obtains outlet and packaging information;
Described integral unit is used to obtain the platform software table that forwarding information that the routing table processing unit obtained and platform software list processing unit are found, and goes out complete forwarding information according to information integrated in routing table of obtaining and the platform software register.
7. device according to claim 6 is characterized in that, described platform software list processing unit is searched at the described of platform software table, is based on routing table and carries out that circulation searching realizes; Described platform software list processing unit is used for when searching the platform software table:
According to the index relative that is indexed to secondary index by one-level, all secondary indexs under the circulation searching one-level index obtain the platform software table according to this.
8. device according to claim 7 is characterized in that, when described integral unit is integrated out complete forwarding information, is used for:
From the platform software table that each circulation time obtained, obtain outlet and packaging information, and, finally integrate out complete forwarding information in conjunction with the described part forwarding information that from routing table, obtains.
9. according to each described device of claim 6 to 8, it is characterized in that described outlet index is based on that the index relative of foundation realizes, described index relative comprises:
Arp is to the index relative of frr/ecmp/ route; Frr is to the index relative of route; Ecmp is to the index relative of route; Public network frr is to the index relative of vpn ecmp/vpn frr; Public network ecmp is to the index relative of vpn ecmp/vpn frr.
10. device according to claim 9 is characterized in that, this device further comprises the routing update unit, is used for: carry out routing update and the routing update information that can be used to reference is provided for described integral unit;
Described routing update is jumped the arp change by next and is caused, or is caused by the change of frr group, or is caused by the change of ecmp group.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102673741A CN101931590A (en) | 2010-08-27 | 2010-08-27 | Method and device for integrating routing |
| PCT/CN2011/074318 WO2012024948A1 (en) | 2010-08-27 | 2011-05-19 | Method and apparatus for integrating routing |
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| CN2010102673741A CN101931590A (en) | 2010-08-27 | 2010-08-27 | Method and device for integrating routing |
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| CN104158718A (en) * | 2014-08-25 | 2014-11-19 | 杭州华三通信技术有限公司 | A message processing method and device |
| CN110635988A (en) * | 2019-10-24 | 2019-12-31 | 北京大学 | Data forwarding method and equipment for multipath transmission |
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Also Published As
| Publication number | Publication date |
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| WO2012024948A1 (en) | 2012-03-01 |
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