Brocade FastIron Ethernet Switch Administration Guide - Manual (Page 124)

Total number of Switchover/Failovers = 0
L3 slib baseline sync status: 0 [complete]
Layer 3 hitless route purge
Layer 3 traffic is forwarded seamlessly during a failover, switchover, or OS upgrade when hitless
management is enabled.
Some protocols support non-stop routing. On enabling non-stop routing, after switchover the
management module quickly re-converge the protocol database. Whereas, some protocols support
graceful restart, in which the protocol state is re-established with the help of neighboring devices.
Once all the protocols converge the routes which were removed from the network during the
convergence period, the routes are deleted from the devices. You can set the route purge timer per
VRF instance. Configure the timer to set the duration for which the routes should be preserved after
switchover. Once this period elapses, the route purging starts, if by then all other protocols have
finished non-stop routing or graceful restart.
When switchover occurs, the route purge timer starts. If non-stop routing or graceful restart is also
configured, the route validation and purging starts only when they are complete and the purge timer
has elapsed. If for some reason more delay is expected in learning the routes, you can configure a
larger period for the purge timer.
Setting the IPv4 hitless purge timer on the defatult VRF
To configure the purge timer, enter the ip hitless-route-purge-timer command in global configuration
mode.
Example for setting IPv4 hitless purge timer on the default VRF
The following example shows how to set the IPv4 hitless purge timer on the default VRF:
Brocade(config)# ip hitless-route-purge-timer 60
Setting the IPv4 hitless purge timer on the non-default VRF
1. Enter the VRF configuration mode using the vrf command.
2. Configure route distinguisher using the rd command.
3. Enter IPv4 address family configuration mode using the address-family ipv4 command.
4. Configure the router purge timer using the ip hitless-route-purge-timer command.
Example for setting the IPv4 hitless purge timer on the non-default
VRF
The following example shows how to set the IPv4 purge timer on the non-default VRF:
Brocade(config)# vrf blue
Brocade(config-vrf-blue)# rd 10:10
Brocade(config-vrf-blue)# address-family ipv4
Brocade(config-vrf-blue-ipv4)# ip hitless-route-purge-timer 60
Layer 3 hitless route purge
124 FastIron Ethernet Switch Administration Guide
53-1003075-02