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Configuration Guide - MPLS

S7700 and S9700 V200R011C10

This document describes MPLS configurations supported by the switch, including the principle and configuration procedures of static LSPs, MPLS LDP, MPLS TE, MPLS QoS, MPLS OAM, Seamless MPLS, and MPLS common features, and provides configuration examples.
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The Two Ends of an LSP Are Up and Can Send Hello Messages, but the Peer End Cannot Receive Them. Why?

The Two Ends of an LSP Are Up and Can Send Hello Messages, but the Peer End Cannot Receive Them. Why?

If the two ends of an LSP are Up and can send Hello messages, but the peer end cannot receive the messages, the possible causes are as follows:
  • Devices do not support sending of large packets, for example, the device can send packets whose maximum size is 180 bytes. To check whether the peer end can send large packets, ping the IP address of the peer end using large packets.
  • Run the display cpu-defend statistics slot slot-id command to check whether Hello messages are dropped due to attack defense policies or Hello messages do not reach the cpu-defend module.
  • Check whether statistics on MPLS-related ACL packets exist and ACLs are correctly delivered.
Updated: 2019-10-18

Document ID: EDOC1000178315

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