R21xx-HP FlexFabric 11900 Series High Availability Command Reference

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In VRRPv2, all routers in an IPv4 VRRP group must have the same interval for sending VRRP
advertisements.
In VRRPv3, the routers in an IPv4 VRRP group can have different intervals for sending VRRP
advertisements. The master in the VRRP group sends VRRP advertisements at the specified interval and
carries the interval attribute in the advertisements. After a backup receives the advertisement, it records
the interval in the advertisement. If the backup does not receive a new VRRP advertisement from the
master when the timer (3 × recorded interval + Skew_Time) expires, it regards the master as failed and
takes over as the master.
HP recommends that you set the VRRP advertisement interval to be greater than 100 centiseconds to
maintain system stability.
Large network traffic might disable a backup from receiving VRRP advertisements from the master within
the specified time and trigger an unexpected master switchover. To solve this problem, you can use this
command to configure a larger interval.
Examples
# Configure the master in IPv4 VRRP group 1 to send VRRP advertisements at an interval of 500
centiseconds.
<Sysname> system-view
[Sysname] interface vlan-interface 2
[Sysname-Vlan-interface2] vrrp vrid 1 timer advertise 500
Related commands
display vrrp
vrrp vrid track
Use vrrp vrid track to associate a VRRP group with a track entry and control master switchover in the
VRRP group in response to changes (such as uplink state changes) detected by the track entry.
Use undo vrrp vrid track to remove the association between a VRRP group and a track entry. If no track
entry is specified, the association between the VRRP group and any track entry is removed.
Syntax
vrrp vrid virtual-router-id track track-entry-number [ reduced priority-reduced | switchover ]
undo vrrp vrid virtual-router-id track [ track-entry-number ]
Default
A VRRP group is not associated with any track entry.
Views
Interface view
Predefined user roles
network-admin
Parameters
virtual-router-id: Specifies an IPv4 VRRP group number in the range of 1 to 255.
track-entry-number: Specifies a track entry by its number in the range of 1 to 1024.