1130 | Virtual Router Redundancy Protocol (VRRP)
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The recommendations in Table 58-1 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 version 3
VRRP version 3 defines VRRP for IPv6. The vrrp-ipv6-group command is used to create IPv6 VRRP
groups, and is similar to the
vrrp-group command, which creates an IPv4 VRRP group and moves you from
INTERFACE mode to a group-specific VRRP command sub-mode.
In the VRRP mode, all VRRP commands are supported for IPv4 and IPv6, except for
authentication-type
which is not supported for IPv6. Also, the following EXEC commands are different for IPv4 and IPv6:
• clear:
• IPv4: clear counters vrrp
• IPv6: clear counters vrrp ipv6
• debug:
• IPv4: debug vrrp
• IPv6: debug vrrp ipv6
• show:
• IPv4: show vrrp
• IPv6: show vrrp ipv6
Between 1000 and 1200 7 seconds 7 seconds 7 seconds 512 255 100 100
Between 1200 and 1500 8 seconds 8 seconds 8 seconds 512 255 120 120
Note: 1500 VRRP groups are supported in FTOS Release 6.3.1.0 and later.
CAUTION: 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 58-1. Recommended VRRP Advertise Intervals
Total VRRP Groups
Recommended Advertise Interval Groups/Interface
E-Series C-Series S-Series
E-Series
ExaScale
E-Series
TeraScale C-Series S-Series
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