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Configuration Guide - Reliability

CloudEngine 12800 and 12800E V200R002C50

This document describes the configurations of Reliability, including BFD Configuration, VRRP Configuration, DLDP Configuration, Smart Link and Monitor Link Configuration, EFM Configuration, and CFM Configuration.
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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. 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.

    The mode switching function takes effect when the interface only has attribute configurations (for example, shutdown and description configurations). Alternatively, if configuration information supported by both Layer 2 and Layer 3 interfaces exists (for example, mode lacp and lacp system-id configurations), no configuration that is not supported after the working mode of the interface is switched can exist. If unsupported configurations exist on the interface, delete the configurations first and then run the undo portswitch command.

    NOTE:

    If many Ethernet interfaces need to be switched to Layer 3 mode, run the undo portswitch batch interface-type { interface-number1 [ to interface-number2 ] } &<1-10> command in the system view to switch these interfaces to Layer 3 mode in batches.

  4. Run vrrp check ttl disable

    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.

  5. Run commit

    The configuration is committed.

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Updated: 2019-03-21

Document ID: EDOC1000166606

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