Extreme Networks ExtremeWare XOS 11.1, Руководство пользователя

Страница: 474 / 496

Glossary
ExtremeWare XOS 11.1 Concepts Guide
474
VRRP Virtual Router Redundancy Protocol. VRRP specifies an election
protocol that dynamically assigns responsibility for a virtual router to
one of the VRRP routers on a LAN. The VRRP router controlling the
IP address(es) associated with a virtual router is called the master
router, and forwards packets sent to these IP addresses. The election
process provides dynamic failover in the forwarding responsibility
should the master router become unavailable. In case the master
router fails, the virtual IP address is mapped to a backup router's IP
address; this backup becomes the master router. This allows any of the
virtual router IP addresses on the LAN to be used as the default first-
hop router by end-hosts. The advantage gained from using VRRP is a
higher availability default path without requiring configuration of
dynamic routing or router discovery protocols on every host. VRRP is
defined in RFC 2338.
VRRP router Any router that is running VRRP. A VRRP router can participate in
one or more virtual routers with VRRP; a VRRP router can be a
backup router for one or more master routers.
V (continued)