Multicast and Routing Guide K/KA/KB.15.15

10.3.33.0/24 10.2.21.1 21 rip 2 120
10.3.34.0/24 10.2.21.1 21 rip 2 120
10.3.37.0/24 10.2.21.1 21 rip 2 120
127.0.0.0/8 reject static 0 0
127.0.0.1/32 lo0 connected 1 0
To not lose the "even-numbered" routes (10.1.12.x and 10.1.14.x) in the OSPF domain, reinstate
the original redistribution in the North router:
router ospf
area backbone
redistribute connected
redistribute rip
exit
And move the prefix list, route map, and redistribution from the North router to the South router.
To get the same distribution of routes from the northern RIP to the southern RIP domain, add the
10.1.15.x and 10.1.16.x routes to the prefix list—they will not be redistributed by the
redistribute connected command because they are not directly connected to the South
router. The prefix list would expand to:
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
ip prefix-list "Odds" seq 15 permit 10.1.15.1 255.255.255.0 ge 24 le 24
ip prefix-list "Odds" seq 20 permit 10.1.16.1 255.255.255.0 ge 24 le 24
The route map would move from North to South with no changes:
route-map "Odds" permit seq 10
match ip address prefix-list "PermitOdds"
exit
And the route redistribution would move from the router ospf context to the router rip
context:
router rip
redistribute connected
redistribute ospf route-map "PermitOdds"
exit
This has the desired effect of redistributing all the routes in the OSPF domain, as indicated by the
East router's route table:
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
10.1.12.0/24 10.3.32.1 32 ospf External2 10 110
10.1.13.0/24 10.3.32.1 32 ospf External2 10 110
10.1.14.0/24 10.3.32.1 32 ospf External2 10 110
10.1.15.0/24 10.3.32.1 32 ospf External2 10 110
10.1.16.0/24 10.3.32.1 32 ospf External2 10 110
10.2.21.0/24 10.3.33.2 33 ospf External2 10 110
10.2.22.0/24 10.3.33.2 33 ospf External2 10 110
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
220 Route Policy