By default, how often are VRRP-E hello messages sent from the master?

In Virtual Router Redundancy Protocol Extended (VRRP-E) configurations on RUCKUS ICX switches, the master router sends hello messages at regular intervals to indicate its active status. By default, these hello messages are sent every 1 second.

Key Points:

Hello Interval: The frequency at which the master router sends hello messages to backup routers.

Default Value: 1 second.

Purpose: To inform backup routers of the master's presence and operational status. If backup routers do not receive hello messages within a specified dead interval, they assume the master is down and initiate a failover.

Configuration:

Viewing Current Settings:

To display the current VRRP-E configuration, including hello intervals:

sql

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show vrrp

Modifying the Hello Interval:

To change the hello interval, enter VRRP-E configuration mode for the specific virtual router instance and use the following command:

php

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vrrp advertisement-interval

: Virtual Router ID.

: Desired interval in seconds.

Example:

To set the hello interval to 2 seconds for VRID 1:

bash

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enable

configure terminal

interface ethernet 1/1/1

vrrp 1

advertisement-interval 2

exit

write memory

Considerations:

Network Stability: Setting the hello interval too low can lead to unnecessary failovers due to transient network issues. Conversely, setting it too high can delay failover detection.

Consistency: Ensure that all routers in the VRRP-E group have consistent hello and dead interval settings to prevent configuration mismatches.

References:

Ruckus FastIron Layer 3 Routing Configuration Guide, 08.0.91

Ruckus FastIron Command Reference Guide, 08.0.70