Enterasys Networks X-PeditionTM manual Vrrp Definitions, XSR1 XSR2

IP Routing Protocols

Figure 5-8 Simple VRRP Topology

VR IP address: 10.10.10.1
XSR1	XSR2
VR Master	VR Backup
10.10.10.1	10.10.10.2
ClientA	ClientB	ClientC

Because the VR uses the IP address of the physical Ethernet interface of XSR1, XSR1 becomes the master VR, also known as the IP address owner. XSR1, as the master VR, assumes the IP address of the VR and is responsible for forwarding packets sent to this IP address.

Clients A, B, and C are configured with the default gateway IP address of 10.10.10.1.

XSR2 is a backup VR. If the master VR fails, XSR2 will take over as the master VR and support the connected LAN hosts. When XSR1 comes back on line, it assumes the role of master VR again.

Figure 5-9illustrates a topology where VRs XSR1 and XSR2 split outgoing traffic between them and provide full system redundancy. ClientA and ClientB install a default route to XSR1’s VR IP address and ClientC and ClientD install a default route to XSR2’s VR IP address. Both XSRs serve dual master/backup roles.

Figure 5-9	Load Balanced, Redundant VRRP Topology
	VR (Group 1)		VR (Group 2)
IP address: 10.10.10.1 IP address: 10.10.10.2
	XSR1		XSR2
VR Master1/Backup2			VR Master2/Backup1
10.10.10.1		10.10.10.2
ClientA	ClientB		ClientC	ClientD

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.

5-28 Configuring IP