User`s guide

90 XSR User’s Guide
IP Routing Protocols Chapter 5
Configuring IP
VRRP Features
Multiple Virtual IP Addresses per VR
The XSR permits specifying multiple virtual IP addresses on the VR (up to 11)
to support multiple logical IP subnet on a LAN segment. This functionality is
specified by the
vrrp <group> ip command.
The primary physical IP address in that interface will be selected as a VRRP
primary IP address, which is used for the VRRP advertisement. The
advertisement timer is set using the
vrrp <group> adver-int command.
If the one of the virtual IP address of a VR is the real physical address of the
interface, then all other virtual IP addresses of that VR will also have to be the
real physical addresses of that interface.
Obversely, if any of the virtual IP addresses is not the real physical address of
that interface, then all of the virtual IP address of that VR cannot be the real
physical address of that interface.
Multiple VRs Per Router
The XSR supports multiples VRs per router as follows:
 A maximum of four VRs are supported per router.
 The scope of a VR is limited to a single LAN segment.
 The VR ID can be reused in a different scope.
Authentication
The XSR supports one type of authentication - simple password
authentication - which is meant to avoid careless misconfiguration, not
provide security. It is invoked with the
vrrp <group> authentication
command. Authentication is set per VR.
Load Balancing
The XSR provides load balancing according to the following rules:
 Load balancing depends on how your network is designed.
 Load balancing is supported by separate physical VRRP routers and
not supported on the same physical router which has two LAN ports
on the same LAN segment with the same subnet.