Cisco NCS 5500 Series

If all /32s are desired in the high-priority queue or medium-priority queue, configure this single route
map:
prefix-set ospf-medium-prefixes
0.0.0.0/0 ge 32
end-set
Configure OSPFv2 OSPF SPF Prefix Prioritization
Perform this task to configure OSPFv2 OSPF SPF (shortest path first) prefix prioritization.
SUMMARY STEPS
1. configure
2. prefix-set prefix-set name
3. route-policy route-policy name if destination in prefix-set name then set spf-priority {critical |
high | medium} endif
4. Use one of these commands:
• router ospf ospf-name
• router ospfv3 ospfv3-name
5. router ospf ospf name
6. spf prefix-priority route-policy route-policy name
7. commit
8. show rpl route-policy route-policy name detail
DETAILED STEPS
Step 1 configure
Step 2 prefix-set prefix-set name
Example:
RP/0/RP0/CPU0:router(config)#prefix-set ospf-critical-prefixes
RP/0/RP0/CPU0:router(config-pfx)#66.0.0.0/16
RP/0/RP0/CPU0:router(config-pfx)#end-set
Configures the prefix set.
Step 3 route-policy route-policy name if destination in prefix-set name then set spf-priority {critical | high | medium}
endif
Example:
RP/0/RP0/CPU0:router#route-policy ospf-spf-priority
RP/0/RP0/CPU0:router(config-rpl)#if destination in ospf-critical-prefixes then
set spf-priority critical
endif
RP/0/RP0/CPU0:router(config-rpl)#end-policy
Configures route policy and sets OSPF SPF priority.
Routing Configuration Guide for Cisco NCS 5500 Series Routers, IOS XR Release 6.3.x
85
Implementing OSPF
Configure OSPFv2 OSPF SPF Prefix Prioritization