Configuring Selective Fib Download - Cisco NCS 5500 Series Configuration Manual

Selective FIB Download
As explained in both the scenarios above, this solution does not affect forwarding performance. There is
Note
no packet redirection from LOW-FIB to HIGH-FIB scale card for route lookup. Therefore, if the HIGH-FIB
card gets reset request or being reloaded, it does not affect the processing of the packet in LOW-FIB card.

Configuring Selective FIB Download

The following example shows how to configure selective FIB Download by marking the route "external-reach":
Router#config
Router(config)#route-policy HIGHLOW_FIB
Router(config-rpl)#if destination in (150.0.0.0/8 le 24) then
Router(config-rpl-if)#set path-color external-reach
Router(config-rpl-if)#pass
Router(config-rpl-if)#else
Router(config-rpl-else)#pass
Router(config-rpl-else)#endif
Router(config-rpl)#end-policy
Router(config)#commit
Router(config)#end
Verification
To verify the "external-reach" attribute for routes, use the following commands:
• show route prefix
• show cef prefix location location detail
• show controllers npu resources [all | encap | exttcamipv4 | exttcamipv6 | lem | lpm] location location
*/Routing Information Base/*
Router#show route 150.0.2.0/24
Routing entry for 150.0.2.0/24
BGP Configuration Guide for Cisco NCS 5500 Series Routers, IOS XR Release 6.2.x
116
Implementing BGP