CN101459630B - IGP routing method and apparatus - Google Patents
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- CN101459630B CN101459630B CN2008101846197A CN200810184619A CN101459630B CN 101459630 B CN101459630 B CN 101459630B CN 2008101846197 A CN2008101846197 A CN 2008101846197A CN 200810184619 A CN200810184619 A CN 200810184619A CN 101459630 B CN101459630 B CN 101459630B
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Abstract
The invention relates to the network communication field, and provides an IGP routing method and a device thereof for solving the defect in the prior art that group characters can not be used in an IGP protocol. The method comprises: collocating the group characters for first routing information of an IGP routing unit of a network device A, sending the first routing information to the IGP routing unit of a network device B by the IGP routing unit of the network device A, guiding the first routing information into a routing table of the network device B, guiding second routing information of the IGP routing unit of the network device A into a BGP routing unit of the network device A, sending the second routing information to the BGP routing unit of the network device B, matching the second routing information of the network device B with the first routing information of the network device B, and guiding the second routing information into the routing table of the network device B. The IGP routing method and the device thereof have the beneficial effects that the complexity of routing management can be effectively simplified, and low cost can be realized.
Description
Technical field
The present invention relates to communication technical field, relate in particular to the network security association area, is a kind of IGP method for routing and device concretely.
Background technology
IGRP (IGP:Interior Gateway Protocol) is defined as at the inner Routing Protocol that uses of an autonomous system.The function of IGP Routing Protocol is to finish packet in the inner Route Selection of autonomous system (AS:Autonomous System), in other words, how tells about packet in the inner forwarding of AS.Picture routing information protocol (RIP:Routing Information Protocol) and ospf Routing Protocol (OSPF:Open Shortest Path First) all are typical IGP Routing Protocols.
Exterior Gateway Protocol (EGP:Exterior Gateway Protocol) is defined as the Routing Protocol that uses between a plurality of autonomous systems.It mainly finishes the Route Selection of packet between AS, in other words, tells about packet in order to arrive the purpose network address, needs by which AS.Borde gateway Routing Protocol (BGP:Border Gateway Protocol) is exactly a kind of EGP Routing Protocol.The IGP Routing Protocol only acts on local AS inside, and other AS are known nothing.
The IGP Routing Protocol can offer the routing iinformation that routing policy uses as the matched routings condition and comprise following several:
The purpose network address: when routing policy control was carried out in the application target network address, when needs mated a large amount of purposes network address, the method for application target network address coupling was filtered route and is just become not light or unrealistic fully, and bad control.
Next hop information: be meant the next hop address that arrives the purpose network here.Use next hop information to carry out routing policy control, be merely able to distinguish routing iinformation with different next hop address.It is then powerless to carry out routing policy control for the routing iinformation of identical next hop address.
Mark (Tag): Tag is the distinctive routing property of OSPF Routing Protocol, is used for route is carried out mark, makes things convenient for routing management.But OSPF Routing Protocol regulation, a route can only be provided with a Tag, can not plural Tag be set to a route.Therefore when using Tag as the matching condition of routing policy, exist distribution T ag attribute too much, the problem of difficult management, increased the difficulty of routing policy management.Route A belongs to classification A, and route B belongs to classification B, so just may have route C, makes this route both belong to classification A, belongs to classification B again, is expressed as A+B, the combination of classification that Here it is.Because Tag only is a numerical value, therefore when classifying distribution T ag, also need to be the combination of these classification also distribution T ag value for each.Same, if be the classification distribution T ag in the previous example, just need 4 Tag to distribute: Tag0 shows that this route neither belongs to classification A and do not belong to classification B again, TagA shows that this route belongs to classification A, TagB shows that this route belongs to classification B, TagAB shows that this route had both belonged to classification A, belonged to classification B again.Therefore when carrying out finer minute time-like to route, just need to distribute more Tag, the quantity that Tag distributes is along with increasing of quantity of classification is Exponential growth (the n power Exponential growth with 2, n is the quantity of classification), be illustrated in figure 1 as the schematic diagram of distribution T ag in the prior art, the quantity of classification is 3, just needs to distribute 8 Tag.Need manage so huge Tag number, and the routing policy control that when formulating routing policy, will consider so many Tag, the difficulty that routing policy is managed increased.
In the introducing mode it is herein incorporated.
Summary of the invention
The object of the present invention is to provide a kind of IGP method for routing, the network route mainly relies on the Tag mark in the prior art in order to solve, and causes network router strategy based thereon control complexity problem of higher.
The present invention also aims to provide a kind of IGP route device,, overcome routing policy control complexity problem of higher in the prior art in order to realize said method.
In order to solve above-mentioned existing issue, the embodiment of the invention provides a kind of IGP method for routing, and this method comprises:
For the first via of the IGP routing table of the IGP routing unit of network equipment A by the information configuration group attribute; The IGP routing unit of described network equipment A sends described first routing iinformation to the IGP of network equipment B routing unit, described first routing iinformation is imported the routing table of the IGP routing unit of described network equipment B; The IGP routing unit of described network equipment A is comprised that the secondary route information of group attribute imports the bgp routing table of the BGP routing unit of described network equipment A; The BGP routing unit of described network equipment A sends to described secondary route information the routing table of the BGP routing unit of described network equipment B; The described secondary route information of the BGP routing unit of described network equipment B is imported in the routing table of IGP routing unit of described network equipment B with the corresponding IGP route record of described first routing iinformation in.
According to a further aspect of the described a kind of IGP method for routing of the embodiment of the invention, described secondary route information also comprises the purpose network address and group attribute.
According to another further aspect of the described a kind of IGP method for routing of the embodiment of the invention, the IGP routing unit of described network equipment A comprises to the step that the IGP of network equipment B routing unit sends described first routing iinformation: the IGP routing unit of described network equipment A sends to described first routing iinformation by the IGP Routing Protocol IGP routing unit of network equipment B;
The BGP routing unit of described network equipment A comprises the step that described secondary route information sends to the BGP routing unit of described network equipment B: the BGP routing unit of described network equipment A sends to described secondary route information by the BGP Routing Protocol BGP routing unit of described network equipment B.
According to another further aspect of the described a kind of IGP method for routing of the embodiment of the invention, the IGP routing unit of described network equipment A is comprised that the step of bgp routing table that the secondary route information of group attribute imports the BGP routing unit of described network equipment A comprises; The secondary route information of the IGP routing unit of described network equipment A imports to the bgp routing table of the BGP routing unit of described network equipment A by the mode of heavily distribution.
Another further aspect according to the described a kind of IGP method for routing of the embodiment of the invention, the described secondary route information of the BGP routing unit of described network equipment B is imported in the IGP routing table of IGP routing unit of described network equipment B with in the corresponding IGP route record of described first routing iinformation and also comprise, first routing iinformation of the IGP routing unit of the described secondary route information of the BGP routing unit of described network equipment B and described network equipment B is complementary.
Another further aspect according to the described a kind of IGP method for routing of the embodiment of the invention, first routing iinformation of the IGP routing unit of the described secondary route information of the BGP routing unit of described network equipment B and described network equipment B is complementary to be comprised, the purpose network address in the purpose network address in the described secondary route information and described first routing iinformation is complementary.
Another further aspect according to the described a kind of IGP method for routing of the embodiment of the invention, if at the IGP of described network equipment A routing unit after the IGP of network equipment B routing unit sends described first routing iinformation, the IGP routing unit of described network equipment B is according to the routing table of this this IGP routing unit of first updating route information, then comprises in the step of routing table of IGP routing unit that the described secondary route information with the BGP routing unit of described network equipment B imports the IGP routing unit of described network equipment B: the group attribute in the described secondary route information is added in the corresponding IGP route record of IGP routing unit routing table of described network equipment B.
Another further aspect according to the described a kind of IGP method for routing of the embodiment of the invention, if at the IGP of described network equipment A routing unit after the IGP of network equipment B routing unit sends described first routing iinformation, the IGP routing unit of described network equipment B is according to the kernel route table of this this network equipment of first updating route information B, then comprises in the single table of the route step that the described secondary route information with the BGP routing unit of described network equipment B imports the IGP routing unit of described network equipment B: the group attribute in the described secondary route information is added in the corresponding IGP route record of kernel route table of described network equipment B.
In order to solve above-mentioned existing issue, the embodiment of the invention also provides a kind of IGP route device, and this device comprises: the IGP routing unit, and the BGP routing unit imports and exports the unit, expanding element;
Described IGP routing unit is connected with described BGP routing unit by the described unit that imports and exports, and described expanding element is connected with described IGP routing unit; Described expanding element is used for the first via to the IGP routing table of the described IGP routing unit of described IGP route device by the information configuration group attribute, generates the secondary route information that comprises group attribute; Described IGP routing unit sends to described first routing iinformation routing table of the IGP routing unit of adjacent IGP route device; The described unit that imports and exports imports and derives described secondary route information between the bgp routing table of the IGP of described IGP routing unit routing table and BGP routing unit; Described BGP routing unit sends to described secondary route information the BGP routing unit of above-mentioned adjacent IGP route device.
A further aspect according to the described a kind of IGP route device of the embodiment of the invention, described expanding element is in the routing table of described IGP routing unit, perhaps in the kernel route table of the IGP of described IGP route device routing unit, add the group attribute row, and according to the described group attribute row of user's secondary route information updating input or that receive.
The beneficial effect of the embodiment of the invention is to be used for strengthening the ability of IGP Routing Protocol aspect routing policy into the group attribute in the IGP Routing Protocol introducing BGP Routing Protocol, makes the management of IGP routing policy become convenient and simple; A kind of scheme of introducing group attribute for the IGP Routing Protocol is provided, this scheme does not need to revise the IGP Routing Protocol, utilize the IGP Routing Protocol to transmit normal route, utilize the BGP Routing Protocol to transmit group attribute, so just be reached for the purpose of IGP Routing Protocol transmission group attribute.Complexity that can the effective simplification routing management, and do not need to revise significantly existing equipment and just can realize above-mentioned purpose at lower cost.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, does not constitute limitation of the invention.In the accompanying drawings:
Figure 1 shows that the schematic diagram of distribution T ag in the prior art;
Figure 2 shows that the present invention strengthens the embodiment flow chart of IGP method for routing;
Figure 3 shows that the present invention strengthens the example structure figure of IGP route device;
Figure 4 shows that the present invention uses the embodiment schematic diagram that strengthens the IGP route;
Figure 5 shows that the enhancing IGP route system example structure figure of the present invention corresponding to Fig. 4 network configuration;
Figure 6 shows that the enhancing IGP route workflow diagram of above-mentioned Fig. 4 embodiment.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer,, the present invention is described in further details below in conjunction with execution mode and accompanying drawing.At this, exemplary embodiment of the present invention and explanation thereof are used to explain the present invention, but not as a limitation of the invention.
The embodiment of the invention provides a kind of IGP method for routing and device.The present invention is described in detail below in conjunction with accompanying drawing.
Be illustrated in figure 2 as the embodiment flow chart that the present invention strengthens the IGP method for routing.
In the prior art, store as first routing iinformation in the background technology in the IGP routing table of the IGP routing unit of network equipment A.
Because original IGP routing table is not support group attribute, therefore the part of group attribute as the IGP routing property need be saved in the IGP routing table when realizing.The user can use routing policy as the IGP route in the IGP routing table group attribute to be set as required.
In embodiments of the present invention, the routing iinformation formation secondary route information that comprises group attribute.
The IGP route sends to network equipment B by normal IGP Routing Protocol.Because the routing property that group attribute is not the IGP Routing Protocol to be supported, so the IGP routing iinformation that the IGP routing unit sends is not carry group attribute, only is common IGP routing iinformation.
In this example, can use the heavy distribution function of BGP Routing Protocol, secondary route information heavily is distributed in the routing table of BGP routing unit, in the BGP routing unit, just has the BGP route record of corresponding with the IGP routing unit (the purpose network address is corresponding) like this.When heavily distributing secondary route information, secondary route is write down entrained group attribute also heavily be distributed in the bgp routing table, as a BGP routing property part.Group attribute just enters into the BGP routing unit like this.
This moment, the IGP routing unit just had group attribute, when, just using the group attribute in the IGP routing unit to use as the matching condition of routing policy, thereby determine how this route should be transmitted during by policy control in the enterprising walking along the street of network equipment B.
As preferred embodiment, the BGP routing unit of the B of the network equipment described in the step 205 comprises the corresponding IGP route record that described secondary route information imports the IGP routing unit routing table of described network equipment B, the secondary route information that described IGP routing unit can send according to the BGP routing unit, in the IGP routing table, add the group attribute row, in the group attribute row of the corresponding IGP route record of described secondary route information (can mate), write corresponding group attribute information according to the purpose network address.
As preferred embodiment, in step 202, the IGP routing unit of described network equipment B is according to the kernel route table of the described network equipment B of first updating route information that receives, and the adding group attribute is listed as in described kernel route table; BGP routing unit at the B of the network equipment described in the step 205 comprises the corresponding IGP route record that described secondary route information imports the IGP routing unit routing table of described network equipment B described BGP routing unit upgrades the group attribute row of corresponding IGP route record in the described kernel route table.The step that above-mentioned IGP routing unit upgrades kernel route table can be not limited in the step 202, can be in step 205 the BGP routing unit carry out before upgrading the step of kernel route table.
Be illustrated in figure 3 as the example structure figure that the present invention strengthens the IGP route device.
Comprise IGP routing unit 301, BGP routing unit 302 imports and exports unit 303, expanding element 304.
Described IGP routing unit 301 is connected with described BGP routing unit by importing and exporting unit 303, and described expanding element 304 is connected with described IGP routing unit 301.
Described IGP routing unit 301 is used for the data message in the local AS of route, and can learn adjacent routing device IGP routing iinformation according to the IGP Routing Protocol.
Described BGP routing unit 302 is used for transmitting bgp routing information according to BGP Routing Protocol and described adjacent routing device.
The described unit 303 that imports and exports, be used between described IGP routing unit and BGP routing unit, changing routing iinformation, promptly can and be stored in described BGP routing unit, perhaps with the secondary route information translation of described BGP routing unit and be stored in described IGP routing unit with the secondary route information translation of IGP routing unit.
Described expanding element 304 adds group attribute in described IGP routing iinformation.
As preferred embodiment, the IGP routing table in the described IGP routing unit of described expanding element 304 expansions adds the group attribute row in described IGP routing table, write the group attribute value then in the group attribute row of the corresponding route record of described IGP routing table.
As preferred embodiment, described expanding element 304 extended core routing tables add the group attribute row in this kernel route table, write the group attribute value then in the group attribute row of the corresponding route record of described IGP routing table.
Be illustrated in figure 4 as the present invention and use the embodiment schematic diagram that strengthens the IGP route.
There are two A of branch company and B in enterprise in the present embodiment, each branch company all has the network equipment of oneself, the network equipment A of the A of branch company, the network equipment B of the B of branch company (being illustrated in figure 5 as the enhancing IGP route system example structure figure of the present invention corresponding to Fig. 4 network configuration).All there are four departments in branch company of every family: production division, office department, Finance Department and research and development department.All there is oneself network separately in each department of each tame branch company, links to each other by core network between them.The user wishes the effect that reaches following:
Have only the network visit mutually of identical department, can not visit mutually between the different departments.
Between research and development department and the production division between a shared test, the therefore network that requires research and development department and production division can visit place between this test.
Production division, office department and research and development department all need to inquire about the financial information of department separately, so Finance Department opens up the financial information that a network (tax inquiry network) is inquired about own department for production division, office department and research and development department especially.
Office department need be to the policy of bulletin company of production division and research and development department, therefore need provide one independently network (policy bulletin network) visit for production division and research and development department.
Figure 6 shows that the enhancing IGP route workflow diagram of above-mentioned Fig. 4 embodiment.
On network equipment A, store conventional routing iinformation in the IGP routing unit 301, be called first routing iinformation in this example, the IGP routing iinformation that described first routing iinformation is network equipment A described in the prior art.
Step 601 adds the group attribute row by expanding element 304 to the routing table of IGP routing unit 301, and is as follows about being provided with of group attribute:
For belonging to the route assignment group attribute A of production division, for belonging to the route assignment group attribute B of Finance Department, for belonging to the route assignment group attribute C of research and development department, for belonging to the route assignment group attribute D of office department.Like this for being carried group attribute A, C by the route between the test of production, research and development department's visit, for being carried group attribute A, B, C, D, for being carried group attribute A, C, D by the route of the policy announcement systems of production, research and development, the visit of office department by the route of the tax inquiry system of production, finance, research and development, the visit of office department.
The routing policy rule of formulating is:
If the group attribute of route comprises group attribute A, then route is sent to production division.
If the group attribute of route comprises group attribute B, then route is sent to Finance Department.
If the group attribute of route comprises group attribute C, then route is sent to research and development department.
If the group attribute of route comprises group attribute D, then route is sent to office department.
Owing to can carry a plurality of group attributes (for example a route record comprises above-mentioned group attribute A, B, C) in a route record, therefore distribute group attribute for each classification, combination for these classification, directly use a plurality of group attribute combinations, this need be various sort merges also distribution T ag unlike Tag, thereby reduced the number (the only number of classifying) of the group attribute of management, also just reduced the difficulty of routing management for route.
The secondary route information via that step 602, IGP routing unit 301 will have an above-mentioned group attribute imports and exports the conversion of unit 303, is stored in the BGP routing unit 302.
As preferred embodiment, the BGP routing unit 302 ' of network equipment B described in the described step 605 can be detected the more new situation of IGP routing unit 301 ', if the routing table of IGP routing unit 301 ' is not upgraded, then described BGP routing unit 302 ' is temporary transient earlier preserves described secondary route information, waits until then after the routing table update of described IGP routing unit 301 ' more described secondary route information is stored in the IGP routing table of IGP routing unit 301 ' of described network equipment B by importing and exporting unit 303 '.
The routing table of the IGP routing unit 301 ' of described then network equipment B after according to described renewal carried out routing policy control to route, just uses the routing policy rule of formulating above and carries out the forwarding of route.
Beneficial effect of the present invention is that the group attribute in the IGP Routing Protocol introducing BGP Routing Protocol is used for strengthening the ability of IGP Routing Protocol aspect routing policy, makes the management of IGP routing policy become convenient and simple; A kind of scheme of introducing group attribute for the IGP Routing Protocol is provided, this scheme does not need to revise the IGP Routing Protocol, utilize the IGP Routing Protocol to transmit normal route, utilize the BGP Routing Protocol to transmit group attribute, so just be reached for the purpose of IGP Routing Protocol transmission group attribute.Introduce group attribute for the IGP Routing Protocol like this, configuration is simple, and is easy to use.
Above-described embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above only is the specific embodiment of the present invention; and be not intended to limit the scope of the invention; within the spirit and principles in the present invention all, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. IGP method for routing is characterized in that this method comprises:
For the first via of the IGP routing table of the IGP routing unit of network equipment A by the information configuration group attribute; The IGP routing unit of described network equipment A sends described first routing iinformation to the IGP of network equipment B routing unit, described first routing iinformation is imported the routing table of the IGP routing unit of described network equipment B; The IGP routing unit of described network equipment A is comprised that the secondary route information of group attribute imports the bgp routing table of the BGP routing unit of described network equipment A; The BGP routing unit of described network equipment A sends to described secondary route information the routing table of the BGP routing unit of described network equipment B; The described secondary route information of the BGP routing unit of described network equipment B is imported in the IGP routing table of IGP routing unit of described network equipment B with the corresponding IGP route record of described first routing iinformation in.
2. a kind of IGP method for routing according to claim 1 is characterized in that described secondary route information also comprises the purpose network address.
3. a kind of IGP method for routing according to claim 1, it is characterized in that, the IGP routing unit of described network equipment A comprises that to the step that the IGP of network equipment B routing unit sends described first routing iinformation IGP routing unit of described network equipment A sends to described first routing iinformation by the IGP Routing Protocol IGP routing unit of network equipment B;
The BGP routing unit of described network equipment A comprises the step that described secondary route information sends to the BGP routing unit of the described network equipment B BGP routing unit of described network equipment A sends to described secondary route information by the BGP Routing Protocol BGP routing unit of described network equipment B.
4. a kind of IGP method for routing according to claim 1 is characterized in that, the IGP routing unit of described network equipment A is comprised that the step of bgp routing table that the secondary route information of group attribute imports the BGP routing unit of described network equipment A comprises; The secondary route information of the IGP routing unit of described network equipment A imports to the bgp routing table of the BGP routing unit of described network equipment A by the mode of heavily distribution.
5. a kind of IGP method for routing according to claim 2, it is characterized in that, the described secondary route information of the BGP routing unit of described network equipment B is imported in the IGP routing table of IGP routing unit of described network equipment B with in the corresponding IGP route record of described first routing iinformation and also comprise, first routing iinformation of the IGP routing unit of the described secondary route information of the BGP routing unit of described network equipment B and described network equipment B is complementary.
6. a kind of IGP method for routing according to claim 5, it is characterized in that, first routing iinformation of the IGP routing unit of the described secondary route information of the BGP routing unit of described network equipment B and described network equipment B is complementary to be comprised, the purpose network address in the purpose network address in the described secondary route information and described first routing iinformation is complementary.
7. a kind of IGP method for routing according to claim 6 is characterized in that,
If at the IGP of described network equipment A routing unit after the IGP of network equipment B routing unit sends described first routing iinformation, the IGP routing unit of described network equipment B is according to the routing table of this this IGP routing unit of first updating route information, then comprises in the step of routing table that the described secondary route information with the BGP routing unit of described network equipment B imports the IGP routing unit of described network equipment B: the group attribute in the described secondary route information is added in the corresponding IGP route record of IGP routing table of IGP routing unit of described network equipment B.
8. a kind of IGP method for routing according to claim 6 is characterized in that,
If at the IGP of described network equipment A routing unit after the IGP of network equipment B routing unit sends described first routing iinformation, the IGP routing unit of described network equipment B is according to the kernel route table of this this network equipment of first updating route information B, then comprises in the step of routing table that the described secondary route information with the BGP routing unit of described network equipment B imports the IGP routing unit of described network equipment B: the group attribute in the described secondary route information is added in the corresponding IGP route record of kernel route table of described network equipment B.
9. IGP route device is characterized in that this device comprises:
The IGP routing unit, the BGP routing unit imports and exports the unit, expanding element;
Described IGP routing unit is connected with described BGP routing unit by the described unit that imports and exports, and described expanding element is connected with described IGP routing unit;
Described expanding element is used for the first via to the IGP routing table of the described IGP routing unit of described IGP route device by the information configuration group attribute, generates the secondary route information that comprises group attribute;
Described IGP routing unit sends to described first routing iinformation routing table of the IGP routing unit of adjacent IGP route device;
The described unit that imports and exports imports and derives described secondary route information between the bgp routing table of the IGP of described IGP routing unit routing table and BGP routing unit;
Described BGP routing unit sends to described secondary route information the BGP routing unit of above-mentioned adjacent IGP route device.
10. a kind of IGP route device according to claim 9, it is characterized in that, described expanding element adds the group attribute row in the routing table of described IGP routing unit or in the kernel route table of the IGP of described IGP route device routing unit, and according to the described group attribute row of user's secondary route information updating input or that receive.
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| CN105577543B (en) | 2011-09-30 | 2019-06-11 | 华为技术有限公司 | Method for routing and equipment based on performance |
| CN110226307B (en) * | 2017-01-26 | 2021-01-29 | 华为技术有限公司 | Method and device for issuing route |
| CN113273148B (en) * | 2018-10-19 | 2022-08-19 | 华为技术有限公司 | Border Gateway Protocol (BGP) for routing policy distribution |
| CN111526093B (en) * | 2019-02-02 | 2022-11-08 | 中兴通讯股份有限公司 | Protocol processing method and device, and storage medium |
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| CN1852239A (en) * | 2005-10-12 | 2006-10-25 | 华为技术有限公司 | Method for actualizing route strategy through boundary gateway |
| CN101047651A (en) * | 2007-04-23 | 2007-10-03 | 杭州华为三康技术有限公司 | Method, system and equipment for setting IP priority level |
| CN101133596A (en) * | 2005-04-13 | 2008-02-27 | 思科技术公司 | Method and apparatus for accelerating border gateway protocol convergence |
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| CN101133596A (en) * | 2005-04-13 | 2008-02-27 | 思科技术公司 | Method and apparatus for accelerating border gateway protocol convergence |
| CN1852239A (en) * | 2005-10-12 | 2006-10-25 | 华为技术有限公司 | Method for actualizing route strategy through boundary gateway |
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