Enables fabric route host mobility mode on a VRRP router.
| vrid | Specifies the VRRP instance for this fabric route host mobility mode configuration. |
Fabric route host mobility mode is disabled.
Interface configuration mode.
VRRP fabric route mode provides for sharing of traffic load for VRRP routers by allowing a VRRP instance in backup state to forward IPv4 and IPv6 traffic that is destined for the VRRP Gateway MAC address. In fabric route mode, asymmetric traffic flows can occur when a host device is moved from a physical server attached to one VRRP router to a physical server attached to another VRRP router. Host-mobility can shorten the time of this asymmetric traffic flow by having OSPF advertise 32-bit host routes for devices on interfaces enabled for host-mobility. When the moved device is installed on the VRRP router, OSPF advertises a 32-bit host route for the installed device. When the VRRP router that previously owned the device receives the new advertisement, it removes the route from its database. Enabling host mobility allows the VRRP router to advertise 32-bit addresses for routes directly connected to the VRRP router.
Directly connected routes that should or should not take part in host mobility can be optionally restricted by assigning an ACL to the fabric route host mobility configuration using vrrp host-mobility-acl (S-, K-Series).
Should the directly attached device be moved to another VRRP router, the full address is advertised by the new VRRP router enabled for fabric route host mobility.
Directly connected routes are not advertised until redistributed by OSPF using redistribute for IPv4 routes and redistribute for IPv6 routes.
The “no” form of this command sets fabric route host mobility to the default state of disabled.
This example enables fabric route host mobility mode on the VRRP backup router on VRID 1:
System(rw)-> System(rw)->configure System(rw-config)->interface vlan 20 System(rw)-config-intf-vlan.0.20)->vrrp host-mobility 1 System(rw)-config-intf-vlan.0.20)->
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