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Method for establishing tunnel forwarding table entries, central node and branch nodes

A branch node and central node technology, applied in the field of communications, can solve the problems that the central network cannot send messages from the branch network, the creation of forwarding entries depends on data traffic, and the forwarding efficiency is affected.

Active Publication Date: 2013-01-09
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In a point-to-multipoint GRE tunnel network, the central network cannot actively send packets to the branch network
Only after the center network receives the message from the branch network and establishes a tunnel entry on the center node, the message sent from the center network to the branch network can be successfully forwarded. The creation of the forwarding table depends on the user's data traffic and cannot be actively created. , affecting the forwarding efficiency

Method used

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  • Method for establishing tunnel forwarding table entries, central node and branch nodes
  • Method for establishing tunnel forwarding table entries, central node and branch nodes
  • Method for establishing tunnel forwarding table entries, central node and branch nodes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] see figure 1 , figure 1 It is a schematic flowchart of establishing a tunnel forwarding entry in an embodiment of the present invention. The specific steps are:

[0062] Step 101, the central node receives a RIP routing protocol message sent by any branch node.

[0063] After any of the branch nodes enable the RIP routing protocol, because they are in the active mode, they will actively send RIP routing protocol packets to the central node, and the central node will receive the RIP routing protocol packets sent by the branch nodes.

[0064] Step 102, the central node establishes tunnel forwarding entries and private network routing entries to the branch nodes according to the received RIP routing protocol message.

[0065] In this step, the central node uses the outer public network source IP address and the inner layer source IP address carried by the received RIP routing protocol message as the IP address and the tunnel interface IP address used to establish the tu...

Embodiment 2

[0074] see figure 2 , figure 2 It is a schematic flowchart of a central node enabling any branch node to establish tunnel forwarding entries to other branch nodes in a specific embodiment of the present invention. The specific steps are:

[0075] Step 201, the central node sends a RIP routing protocol message carrying the connected private network routes of all branch nodes learned by itself to any of the branch nodes, so that the branch node learns the routes connected to all branch nodes other than itself. Private network routing, generate private network routing table entries.

[0076] Step 202, the central node receives the user data message sent by the branch node to other branch nodes, performs GRE decapsulation, and enters the IP address in the private network routing table entry according to the inner layer destination IP address of the decapsulated user message Searching, wherein the inner layer destination IP address is the private network address of the user co...

Embodiment 3

[0081] The following describes in detail how a branch node establishes tunnel forwarding entries to other branch nodes through Embodiment 3 with reference to the accompanying drawings.

[0082] see image 3 , image 3 Schematic flow chart of establishing tunnel forwarding entries for any branch node to other branch nodes. The specific steps are:

[0083] Step 301, any branch node receives the RIP routing protocol message sent by the central node and carries the locally learned private network routes connected to each of the branch nodes, and according to the RIP routing protocol message carried in each The private network routes connected to the branch nodes generate private network routing table entries.

[0084] In this step, the process of sending the private network route connected to the branch node learned locally by the central node is as follows:

[0085] The branch node sends the RIP routing protocol message carrying the private network route learned locally to th...

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Abstract

The invention discloses a method for establishing tunnel forwarding table entries. The method includes establishing tunnel forwarding table entries and private-network routing table entries to a branch node according to a received RIP (routing information protocol) routing protocol message when the central node receives an RIP routing protocol message sent by any branch node, and sending the RIP routing protocol message to the branch node. Based on the same conception, the invention further introduces the central node and the branch nodes, and the central node can automatically establish the tunnel forwarding table entries while triggering of user data messages is not needed.

Description

technical field [0001] The present application relates to the technical field of communication, and in particular to a method for establishing a tunnel forwarding entry, a central node and a branch node. Background technique [0002] A traditional Generic Routing Encapsulation (GRE) tunnel is a point-to-point connection. When GRE is applied to an enterprise network, multiple point-to-point GRE tunnels need to be established between the enterprise central node and each branch. When there are many branches of the enterprise, the workload of configuration is huge; moreover, if a new branch is added, the configuration needs to be added on the central node, which increases the burden of network maintenance; The uncertainty of the public network address also increases the complexity of central node configuration. [0003] Dynamic virtual private network (Dynamic Virtual Private Network, DVPN), can learn the corresponding relationship between public network addresses and private n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/46H04L12/701
Inventor 徐伟
Owner NEW H3C TECH CO LTD
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