Configuring vrrp groups, Load sharing, Vrrp g – LevelOne GTL-2691 User Manual

Page 640

HAPTER

| Configuring Router Redundancy

Configuring VRRP Groups

– 640 –

Figure 395: Several Virtual Master Routers Configured for Mutual Backup
and Load Sharing

OTE

Load sharing can be accomplished by assigning a subset of

addresses to different host address pools using the DHCP server. (See

"Configuring Address Pools" on page 607

)

ONFIGURING

VRRP G

ROUPS

Use the IP > VRRP pages to configure VRRP. To configure VRRP groups,

select an interface on each router in the group that will participate in the

protocol as the master router or a backup router. To select a specific device

as the master router, set the address of this interface as the virtual router

address for the group. Now set the same virtual address and a priority on

the backup routers, and configure an authentication string. You can also

enable the preempt feature which allows a router to take over as the

master router when it comes on line if it has a higher priority than the

currently active master router.

CLI R

EFERENCES

◆

"VRRP Commands" on page 1381

OMMAND

SAGE

Address Assignment –

◆

To designate a specific router as the VRRP master, the IP address

assigned to the virtual router must already be configured on the router

that will become the Owner of the group address. In other words, the

IP address for the virtual router exists on one, and only one, router in

the virtual router group, and the network mask for the virtual router

address is derived from the Owner. The Owner will also assume the role

of the Master virtual router in the group.

◆

If a virtual address is assigned to the group which does not exist on any

of the group members, then the master router is selected based on

Router 1

VRID 23 (Master)
IP(R1) = 192.168.1.3
IP(VR23) = 192.168.1.3
VR Priority = 255

VRID 25 (Backup)
IP(R1) = 192.168.1.3
IP(VR25) = 192.168.1.5
VR Priority = 100

Router 2

VRID 23 (Backup)
IP(R1) = 192.168.1.5
IP(VR23) = 192.168.1.3
VR Priority = 100

VRID 25 (Master)
IP(R1) = 192.168.1.5
IP(VR25) = 192.168.1.5
VR Priority = 255

Hosts (192.168.1.10-99)

Hosts (192.168.1.100-250)

LAN Segment A

LAN Segment B