Master Router; Owner Router - HP ProCurve 6200yl Multicast And Routing Manual

Virtual Router Redundancy Protocol (VRRP)
General Operation
A subnetted VLAN allows multiple, virtual IP addresses. However, if there are
32 or fewer IP addresses in a VLAN interface and you want VRRP support on
multiple subnets, then the recommended approach is to configure a separate
VR instance for each IP address in the VLAN. In cases where VRRP support is
needed for more than 32 IP addresses in the same VLAN, refer to "Associating
More Than One Virtual IP Address With a VR" on page 6-17.

Master Router

The current Master router in a VR operates as the "real", or physical gateway
router for the network or subnet for which a virtual IP address is configured .
Control of Master Selection. Selection of the Master is controlled by the
VRRP priority value configured in the VRID context of each router in the VR.
The router configured as the Owner in the VR is automatically assigned the
highest VRRP priority (255) and, as long as it remains available, operates as
the Master router for the VR. (The other routers belonging to the VR as
Backups are assigned the default priority value (100) and can be reconfigured
to any priority value between 1 and 254, inclusive.) If the current Master
becomes unavailable, the protocol uses the priority values configured on the
other, available routers in the VR to select another router in the VR to take
over the Master function.
Function of the VRRP Advertisement. The current Master router sends
periodic advertisements to inform the other router(s) in the VR of its opera­
tional status. If the backup VR(s) fail to receive a Master advertisement within
the timeout interval, the current Master is assumed to be unavailable and a
new Master is elected from the existing Backups. The timeout interval for a
VR is three times the advertisement interval configured on the VR(s) in the
network or subnet. In the default VRRP configuration, the advertisement
interval is one second and the resulting timeout interval is three seconds.
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 adver­
tisement interval does not match the interval received in an inbound VRRP
packet, then the VR drops that packet.

Owner Router

An Owner router for a VR is the default Master router for the VR, and operates
as the Owner for all subnets included in the VR. As mentioned earlier, the
VRRP priority on an Owner router is always 255 (the highest).
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