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A kind of ldp remote neighbor configuration method and device

A technology of remote neighbors and configuration methods, applied in the field of communication, can solve problems such as LSRCPU busy, LDP neighbor information or other protocol negotiation errors, and achieve the effect of improving security

Active Publication Date: 2016-01-20
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this mechanism also brings some risks to LDP
For example, an attacker can forge LDP protocol packets and send a large number of forged packets to the LSR, causing LDP neighbor information or other protocol negotiation errors, LSRCPU is busy, etc.

Method used

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  • A kind of ldp remote neighbor configuration method and device
  • A kind of ldp remote neighbor configuration method and device
  • A kind of ldp remote neighbor configuration method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] based on figure 1 The network architecture shown, figure 2 A schematic diagram of the process of establishing a remote LDP neighbor is shown, which describes the process of LSR2 verifying the validity of the message and performing corresponding processing according to the verification result after LSR1 sends the LDPTargetHello message to LSR2. As shown, the process can include:

[0040] Step 201, after LSR2 receives the LDPTargetHello message sent by LSR1, the LDP module of LSR2 sends a forwarding hop count acquisition request to the OSPF module, which carries a source address and a destination address. Next, the source address refers to the address of LSR2, and the destination address refers to the source address of the LDPTargetHello message (that is, the address of LSR1).

[0041] In step 202, the OSPF module queries the OSPF routing table according to the destination address, and searches whether there is a matching route according to the longest match principle....

Embodiment 2

[0118] In order to reduce the reverse ABRTTL calculation overhead of the router, Embodiment 2 of the present invention improves Embodiment 1 above. That is, after the LDP proxy device (including the area proxy or / and backbone area proxy) performs the reverse ABRTTL calculation, the calculation result is saved or updated locally; or, the LDP proxy device receives the proxy response returned by other LDP proxy devices , save or update the reverse ABRTTL calculation result carried in the response locally. If the relevant information of the reverse ABR calculation result is saved in the form of a proxy table, each entry can contain the following information: initial neighbor, source address, destination address, proxy next hop, forwarding hops (such as including the lower limit of hops, The upper limit of the number of hops) may further include routing information, SPF information, and the like. in:

[0119] Start Neighbor: When a proxy request message is received from a neighbo...

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Abstract

The present invention opens the LDP remote neighbor's configuration method and equipment, which is applied to multiple regional networks. There are proxy devices in various areas; this method includes: after the router receives the LDP packet or initiates LDP packets to the end, calculates it to it to the end, and it is calculated to calculate it to the end.If the number of forwarding jumps is within the specified range, the LDP neighbor will be established with the end; the number of reposts to the end of the pair of pairs includes: the pairing address is used as the destination address to match, and and and and and.Determine the type of the routing after matching the routing; if it is the internal routing of the area, the root node of the forwarding jump is calculated based on the destination address, and the number of repost jumps from the root node to the router; if it is the area is the areaThe route is obtained through the proxy device to obtain the number of forwarding jumps from the root node to the router. Among them, the root node is determined according to the destination address.The use of the present invention can improve the security of the configuration of LDP remote neighbors.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to an LDP remote neighbor configuration method and equipment. Background technique [0002] LDP (LabelDistributionProtocol, Label Distribution Protocol), as a basic protocol of MPLS (MultiprotocolLabelSwitching, Multiprotocol Label Switching), is widely used in fields such as operators. [0003] There are two types of LDP peer discovery mechanisms: [0004] Basic discovery mechanism: used to discover local LDP peers, that is, LSRs (LabelSwitchRouter, label switching routers) directly connected through the link layer. In this mode, the LSR periodically sends an LDP link Hello message to the multicast address 224.0.0.2 of "all routers in the subnet", so that the directly connected LSRs at the link layer can discover this LDP peer. [0005] Extended discovery mechanism: used to discover remote LDP peers, that is, LSRs that are not directly connected through the link la...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/70H04L29/12H04L29/08H04L45/02
Inventor 赵昌峰马臻
Owner NEW H3C TECH CO LTD