10.2.23.0/24 10.3.33.2 33 ospf External2 10 110
10.2.29.0/24 10.3.33.2 33 ospf External2 10 110
10.3.31.0/24 10.3.32.1 32 ospf IntraArea 2 110
10.3.31.0/24 10.3.33.2 33 ospf IntraArea 2 110
10.3.32.0/24 VLAN32 32 connected 1 0
10.3.33.0/24 VLAN33 33 connected 1 0
10.3.34.0/24 VLAN34 34 connected 1 0
10.3.37.0/24 10.3.33.2 33 ospf IntraArea 2 110
127.0.0.0/8 reject static 0 0
127.0.0.1/32 lo0 connected 1 0
Host L can now ping host X and, indeed, any other host in any of the three routing domains.
Finer control of inter-domain routing using route policy
The wide variety of match types available with route policy allows you to make finer distinctions when distributing
routes across routing domain boundaries.
Suppose that you want to limit the distribution of the "non-connected" routes in the northern RIP domain to the
"odd-numbered" prefixes—that is, to 10.1.11.x and 10.1.13.x. You can accomplish that by creating a prefix list:
ip prefix-list "Odds" seq 5 permit 10.1.11.1 255.255.255.0 ge 24 le 24
ip prefix-list "Odds" seq 10 permit 10.1.13.1 255.255.255.0 ge 24 le 24
Then matching that prefix-list in a route map:
route-map "PermitOdds" permit seq 10
match ip address prefix-list "Odds"
exit
And finally applying that route map to the redistribution of RIP routes in the North router:
router ospf
area backbone
redistribute connected
redistribute rip route-map "PermitOdds"
exit
The result of this is to permit redistribution of routes 10.1.11.x and 10.1.13.x, and to deny redistribution of routes
10.1.12.x and 10.1.14.x. (Routes 10.1.15.x and 10.1.16.x are redistributed by the
redistribute connected
command.) This occurs throughout the OSPF domain, and is propagated through redistribution by the South
router into the southern RIP domain.
For instance, in the OSPF domain the route map of the East router becomes:
East(config)# show ip route
IP Route Entries
Destination Gateway VLAN Type Sub-Type Metric Dist.
--------------- --------------- ---- --------- ---------- ---------- -----
10.1.11.0/24 10.3.32.1 32 ospf External2 10 110
10.1.13.0/24 10.3.32.1 32 ospf External2 10 110
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Aruba 3810 / 5400R Multicast and Routing Guide for ArubaOS-
Switch 16.08
