Voyager Reference Guide
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VRRP (Virtual Router Redundancy Protocol)
VRRP Description
Virtual Router Redundancy Protocol (VRRP) provides dynamic fail-over of
IP addresses from one router to another in the event of failure. It is used on
shared media where end hosts are configured with a static default route. In
this environment, normally the loss of the default router results in a
catastrophic event, isolating all end hosts that are unable to detect any
alternate path that may be available. Using VRRP, a router can automatically
assume responsibility for forwarding IP traffic sent to the default router's
address, should the default router fail. This allows a higher availability default
path without requiring configuration of dynamic routing or router discovery
protocols on every end host.
Virtual Routers
To back up a default router using VRRP, a Virtual Router must be created for
it. A Virtual Router consists of a unique Virtual Router ID (VRID), and the
default router's IP address(es) on the shared LAN.
The Virtual Router is created on the default router by specifying the router's
interface to the shared LAN and by specifying the VRID by which this
router's addresses will be identified in the LAN. The default router's IP
addresses are added to the Virtual Router automatically.
Once a Virtual Router has been created on the default router, other routers can
be configured as backup routers. This is done by configuring the default
router's Virtual Router information (its VRID and IP addresses) on each of the
backup routers. They will then use VRRP to take over the default router's
addresses, should it fail.
Summary of Contents for Network Voyager
Page 1: ...Voyager Reference Guide Part No N450820002 Rev A Published December 2003 ...
Page 4: ...4 Voyager Reference Guide ...
Page 30: ...2 How to Use Voyager 30 Voyager Reference Guide ...
Page 32: ...3 Command Line Utility Files 32 Voyager Reference Guide ...
Page 220: ...5 Configuring Interfaces 220 Voyager Reference Guide ...
Page 446: ...7 Configuring Traffic Management 448 Voyager Reference Guide ...
Page 618: ...10 Configuring Security and Access 620 Voyager Reference Guide ...
Page 668: ...14 Configuring IPv6 670 Voyager Reference Guide ...
Page 672: ...15 IPSO Process Management 674 Voyager Reference Guide ...
Page 700: ...Index 702 Voyager Reference Guide ...