Users Guide

The recommendations in the following table 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 may increase or decrease accordingly.
Default VRRP settings may affect the maximum number of groups that you can configure and work efficiently
as a result of hardware throttling VRRP advertisement packets reaching the RP2 processor on the S5000. To
avoid throttling VRRP advertisement packets, Dell Networking recommends increasing the VRRP
advertisement interval to a value higher than the default value of 1 second. The recommendations are as
follows:
CAUTION: Increasing the advertisement interval increases the VRRP Master dead interval, resulting in
an increased failover time for Master/Backup election. Take caution when increasing the advertisement
interval, as the increased dead interval may cause packets to drop during that switch-over time.
Table 90. Recommended VRRP Advertise Intervals on the S5000
Recommended Advertise Interval Groups/Interface
Total VRRP Groups S5000 S5000
Less than 250 1 second 512
Between 250 and 450 2–3 seconds 512
Between 450 and 600 3–4 seconds 512
Between 600 and 800 4 seconds 512
Between 800 and 1000 5 seconds 512
Between 1000 and 1200 7 seconds 512
Between 1200 and 1500 8 seconds 512
VRRP Configuration
By default, VRRP is not configured.
Configuration Task List
The following list specifies the configuration tasks for VRRP.
• Creating a Virtual Router
• Configuring a Virtual IP Address
• Setting VRRP Group (Virtual Router) Priority
• Configuring VRRP Authentication
• Disabling Preempt
• Changing the Advertisement Interval
• Track an Interface or Object
Virtual Router Redundancy Protocol (VRRP) 1208