Layer 3 Hitless Route Purge; Setting The Ipv4 Hitless Purge Timer On The Defatult Vrf; Example For Setting Ipv4 Hitless Purge Timer On The Default Vrf; Setting The Ipv4 Hitless Purge Timer On The Non-Default Vrf - Brocade Communications Systems FastIron Administration Manual

Configured Active Slot = 9
Running-Config Sync Period = (upon "write mem")
=== MP Redundancy Statistics ===
Current Active Session:
Active mgmt slot = 9, Standby mgmt slot = 10 (Absent)
Switchover cause = No Switchover
Start Time
Sxr Sys Hitless Enable Status = 0
Total number of Switchover/Failovers = 0
L3 slib baseline sync status: 0

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.
FastIron Ethernet Switch Administration Guide
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= Jan 1 00:00:09
[complete]

Layer 3 hitless route purge

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