492
C
HAPTER
17: V
IRTUAL
R
OUTER
R
EDUNDANCY
(VRRP)
✓
3500
✓
9000
9400
3900
9300
ip vrrp define
For CoreBuilder 9000: Applies to Layer 3 switching modules only.
Defines a virtual router on the system.
Valid Minimum Abbreviation
ip v def
Important Considerations
■
Authentication passwords can be up to eight alphanumeric
characters.
Primary Routers
■
You can define
one
Primary router per VLAN.
■
Primary routers own the IP addresses that you associate with a virtual
router.
■
When you define a Primary virtual router, the possible VLANs that you
can select are the IP VLANs on the router that have no virtual routers
configured.
■
The virtual router ID (VRID) must be unique across all locally attached
LAN segments and unique for the local router.
■
When you define a Primary virtual router, you cannot use the VRID of
a virtual router that is already defined on the system or the VRID of a
neighboring VRRP router.
Backup Routers
■
Backup routers back up the primary router of a specified virtual router
and assume Master state responsibilities for the virtual router should
the primary router fail.
■
When you define a Backup virtual router, you cannot use the VRID of a
primary router that is defined on the system. You cannot define a
Primary and Backup VRRP router for the same virtual router on the
same routing device.
Address Mode
■
In
auto-learn
mode, systems learn the IP addresses to associate
with the specified VRID.
■
In
IP address
mode, the system prompts you to select the interface
index from a list.
■
After a reboot, the address learning process restarts for each virtual
router in auto-learn address mode.
■
When you define a Primary virtual router, selecting
auto-learn
as
the address mode automatically adds all IP addresses that are
associated with the selected VLAN to the primary virtual router.
