Virtual Router Redundancy Protocol (VRRP)
Configuring VRRP
Changing VR Advertisement Interval and Source IP Address
The advertisement interval is used in one of two ways, depending on whether
a VRRP router is operating as a Master or a Backup.
Syntax: advertise-interval < 1 - 255 >
■ When a VRRP router is operating as Master, this value
specifies the interval at which the router sends an
advertisement notifying the other VRRP routers on the
network or subnet that a Master is active.
■ When a VRRP router is operating as a Backup, it uses
this value to calculate a timeout interval ( 3 x advt-
interval).
The VR instance must be disabled (the default VR state) when
using this command.
(Range: 1 - 255 seconds; Default: 1 second)
For information on advertisements and advertisement inter-
vals, see “Function of the VRRP Advertisement” on page 6-9
Note: All VRRP routers belonging to the same VR must be
configured with the same advertisement interval. As required
in RFC 3768, if a locally configured advertisement interval
does not match the interval received in an inbound VRRP
packet, then the VR drops that packet.
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