Reference Guide

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 77. 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
• Setting VRRP Initialization Delay
For a complete listing of all commands related to VRRP, refer to Dell Networking OS Command Line
Reference Guide.
Virtual Router Redundancy Protocol (VRRP)
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