HP 3500YL - Manual (Page 336)

Virtual Router Redundancy Protocol (VRRP)
General Operation
Figure 6-1, below, illustrates a virtual router on VLAN 100 supported by Router
1 (R1) and Router 2 (R2).
Router 1 Configuration
VRID: 1
Status: Owner
Virtual IP Addr: 10.10.100.1
MAC Addr: 00-00-5E-00-01-01
Priority: 255
Router 1 (R1)
VLAN VID: 100
IP: 10.10.100.1
Router 2 (R2)
VLAN VID: 100
IP: 10.10.100.5
Switch
Intranet
Host “A”
Router 2 Configuration
VRID: 1
Status: Backup
Virtual IP Addr: 10.10.100.1
MAC Addr: 00-00-5E-00-01-01
Priority: 100
VR 1
Host “A” Gateway: 10.10.100.1
As long as R1 remains available, it
operates as the Master. If R1 fails,
then R2 takes over as Master.
Figure 6-1. Example of Using VRRP To Provide Redundant Network Access
VR
Parameter
Router 1 VR
Configuration
Router 2 VR
Configuration
Operation
VRID 1 1 All routers in the same VR have the same VRID.
(Virtual
Router ID)
Status Owner Backup One Owner and one or more Backups are
allowed in a given VR.
Virtual IP
Address 10.10.100.1 10.10.100.1 The IP address configured for VLAN 100 in R1
(the Owner) is also configured as the Virtual IP
Address for VRRP in both R1 and R2.
VR Source
MAC
Address 00-00-5E-00-01-01 For any VR in any VLAN, this is always defined
as 00-00-5E-00-01-< VRID >, and is not
configurable.
Priority 255
(Default)
100
(Default)
The router configured as Owner in any VR is
automatically assigned the highest priority
(255). Backup routers are assigned a default
priority of 100, which can be reconfigured.
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