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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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Association Between a VRRP Group and the Interface Status to Monitor the Uplink Interface

Association Between a VRRP Group and the Interface Status to Monitor the Uplink Interface

A VRRP group can only detect the status change of the interface on which it is configured. VRRP cannot detect faults on the uplink interface or direct uplink of the master, causing service interruptions. To resolve this issue, you can configure association between a VRRP group and the interface status. When the uplink interface or direct uplink of the master fails, the priority of the master is adjusted. This triggers an active/standby switchover and ensures proper traffic forwarding.

A VRRP group can monitor the interface status in Increased or Reduced mode:
  • In Increased mode, when the monitored interface goes Down, the priority of the VRRP device increases.
  • In Reduced mode, when the monitored interface goes Down, the priority of the VRRP device decreases.
Figure 3-8 Association between a VRRP group and the interface status

In Figure 3-8, a VRRP group is configured between SwitchA and SwitchB, which are the master and backup, respectively. Both switches work in preemption mode. On SwitchA, the Reduced mode is used to monitor uplink interface Interface1. When Interface1 becomes faulty, the priority of SwitchA decreases. Then SwitchB becomes the master through negotiation, ensuring that user traffic is forwarded correctly.

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Updated: 2019-03-21

Document ID: EDOC1000166606

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