Reference Guide

874 | Virtual Router Redundancy Protocol (VRRP)
www.dell.com | support.dell.com
The recommendations in Table 51-1 may vary depending on various factors like ARP broadcasts, IP
broadcasts, or STP before changing the advertisement interval. When the number of packets processed by
RP2/CP/FP processor increases or decreases based on the dynamics of the network, the advertisement
intervals in may increase or decrease accordingly.
VRRP Configuration
By default, VRRP is not configured.
Configuration Task List for VRRP
The following list specifies the configuration tasks for VRRP:
• Create a Virtual Router (mandatory)
• Assign Virtual IP addresses (mandatory)
• Set VRRP Group (Virtual Router) Priority (optional)
• Configure VRRP Authentication (optional)
• Disable Preempt (optional)
• Change the Advertisement interval (optional)
• Track an Interface (optional)
• VRRP initialization delay
For a complete listing of all commands related to VRRP, refer to
FTOS Command Line Interface.
Between 1000 and
1200
7 seconds 7
seconds
100 100
Between 1200 and
1500
8 seconds 8
seconds
120 120
Note: The 1500 VRRP groups are supported in FTOS Release 6.3.1.0 and later.
Note: Increasing the advertisement interval increases the VRRP Master dead interval, resulting in an
increased failover time for Master/Backup election. Take extra caution when increasing the advertisement
interval, as the increased dead interval may cause packets to be dropped during that switch-over time.
Table 51-1. Recommended VRRP Advertise Intervals
Total VRRP
Groups
Recommended
Advertise Interval Groups/Interface
S-Series
Z-Serie
s
S-Serie
s
Z-Serie
s