User`s guide

XSR User’s Guide 87
Chapter 5 IP Routing Protocols
Configuring IP
Figure 10 Load Balanced, Redundant VRRP Topology
VRRP Definitions
The XSR defines VRRP terms as follows:
VRRP Router - A router running the Virtual Router Redundancy Protocol. It
may participate in one or more VRs.
Virtual Router - An abstract object managed by VRRP that acts as a default
router for hosts on a shared LAN. It consists of a VR Identifier and a set of
associated IP address(es) across a common LAN. A VRRP router may back up
one or more VRs.
IP Address Owner - The VRRP router that has the VR's IP address(es) as real
interface address(es). This is the router that, when up, will respond to packets
addressed to one of these IP addresses for ICMP pings, TCP connections, etc.
VRRP Primary IP Address - An IP address selected from the set of real interface
addresses. One possible selection algorithm is to always select the first
address. VRRP advertisements are always sent using the primary IP address
as the source of the IP packet.
Virtual Router Master - The VRRP router that assumes the responsibility of
forwarding packets sent to the IP address(es) associated with the VR, and
answers ARP requests for these IP address. Note that if the IP address owner
is available, then it will always become the master.
XSR1
VR Master1/Backup2
10.10.10.1
ClientA ClientB
ClientC
10.10.10.2
VR (Group 1)
XSR2
VR Master2/Backup1
ClientD
VR (Group 2)
IP address: 10.10.10.1
IP address: 10.10.10.2