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S12700 V200R010C00 Configuration Guide - Reliability

This document describes the configuration of BFD, DLDP, VRRP, SmartLink, CFM, EFM, Y.1731 and MAC swap loopback to ensure reliability on the device.
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(Optional) Disabling VRRP TTL Check

(Optional) Disabling VRRP TTL Check

Context

The system checks the TTL value in received VRRP Advertisement packets, and discards VRRP Advertisement packets with TTL values other than 255. On a network where devices of different vendors are deployed, if TTL check is enabled on the device, the device may incorrectly discard valid packets. In this case, disable TTL check so that devices of different vendors can communicate.

Procedure

  1. Run:

    system-view

    The system view is displayed.

  2. Run:

    interface interface-type interface-number

    The interface view is displayed.

  3. (Optional) On an Ethernet interface, run undo portswitch

    The interface is switched to Layer 3 mode.

    By default, an Ethernet interface works in Layer 2 mode.

  4. Run:

    vrrp un-check ttl

    The device is configured not to check the TTL value in VRRP Advertisement packets.

    By default, the system checks the TTL value in VRRP Advertisement packets.

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Updated: 2019-04-20

Document ID: EDOC1000142090

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