Multicast and Routing Guide K/KA/KB.15.15

match ip address prefix-list "Odds"
set tag 1
exit
route-map "TagIn" permit seq 20
match ip address prefix-list "Evens"
set tag 2
exit
Set up a separate route map to match the connected routes, and assign the same tag value you
used for the odd routes. This allows you to propagate both the odd and the connected routes, but
not the even routes, to the southern RIP domain.
route-map "TagConn" permit seq 10
match source-protocol connected
set tag 1
exit
Redistribute the routes to the OSPF domain using the route maps:
router ospf
area backbone
redistribute connected route-map "TagConn"
redistribute rip route-map "TagIn"
exit
On the South router set up a route map with three sequences:
• One to permit routes with tag values of 1
• One to deny routes with tag values of 2
• One to permit OSPF routes (this propagates all the routes from the OSPF domain
The route map looks like this:
route-map "TagOut" permit seq 10
match tag 1
exit
route-map "TagOut" deny seq 20
match tag 2
exit
route-map "TagOut" permit seq 30
match source-protocol ospf
This arrangement permits the odd routes from the northern RIP domain and the RIP routes that were
connected to the North router. It denies the even routes from the northern RIP domain, and it permits
the OSPF routes. The route table from the Southeast router shows the results:
Southeast(config)# show ip route
IP Route Entries
Destination Gateway VLAN Type Sub-Type Metric Dist.
--------------- --------------- ---- --------- ---------- ---------- -----
10.1.11.0/24 10.2.21.1 21 rip 2 120
10.1.13.0/24 10.2.21.1 21 rip 2 120
10.1.15.0/24 10.2.21.1 21 rip 2 120
10.1.16.0/24 10.2.21.1 21 rip 2 120
10.2.21.0/24 VLAN21 21 connected 1 0
10.2.22.0/24 VLAN22 22 connected 1 0
10.2.23.0/24 VLAN23 23 connected 1 0
10.2.29.0/24 10.2.21.1 21 rip 2 120
10.3.31.0/24 10.2.21.1 21 rip 2 120
10.3.32.0/24 10.2.21.1 21 rip 2 120
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
Using route policy in route redistribution 223