In this lab, we'll learn how to control redistribution base on the tag. Setup your network as topology, addressing and routing protocol above. Make sure everything working correctly.
Create route-map and set tag using ACL.
filter the traffic we want to control using ACL, in this case we gonna create an ACL group of classless network coming from router C, done on router B
ip access-list standard CLASSLESS
permit 10.1.1.4 0.0.0.3
permit 6.0.0.0 0.15.255.255
permit 146.6.0.0 0.0.15.255
permit 206.6.6.0 0.0.0.15
create a route-map and set the specific tags
route-map SET_TAGS permit 10
match ip address CLASSLESS
set tag 1
!
route-map SET_TAGS permit 20
set tag 2 //we didn't set ant match, anything don't match ant from above will fall under this group
now apply this route-map to be redistribute into OSPF 1
router ospf 1
log-adjacency-changes
redistribute eigrp 1 subnets route-map SET_TAGS
network 10.1.1.2 0.0.0.0 area 0
Below is the final configuration for all the routers
Router A conf
Router B conf
Router C conf
Router D conf
route-map SET_TAGS permit 10
match ip address CLASSLESS
set tag 1
!
route-map SET_TAGS permit 20
set tag 2 //we didn't set ant match, anything don't match ant from above will fall under this group
now apply this route-map to be redistribute into OSPF 1
router ospf 1
log-adjacency-changes
redistribute eigrp 1 subnets route-map SET_TAGS
network 10.1.1.2 0.0.0.0 area 0
show ip route from router A should now show all the network coming from router C
A>sh ip rou
1.0.0.0/32 is subnetted, 1 subnets
C 1.1.1.1 is directly connected, Loopback0
O E2 205.5.5.0/24 [110/20] via 10.1.1.2, 00:30:59, Serial0/1
206.6.6.0/28 is subnetted, 1 subnets
O E2 206.6.6.0 [110/20] via 10.1.1.2, 00:30:59, Serial0/1
O E2 5.0.0.0/8 [110/20] via 10.1.1.2, 00:30:59, Serial0/1
6.0.0.0/12 is subnetted, 1 subnets
O E2 6.0.0.0 [110/20] via 10.1.1.2, 00:30:59, Serial0/1
O E2 145.5.0.0/16 [110/20] via 10.1.1.2, 00:30:59, Serial0/1
10.0.0.0/30 is subnetted, 3 subnets
C 10.1.1.8 is directly connected, Serial0/0
C 10.1.1.0 is directly connected, Serial0/1
O E2 10.1.1.4 [110/20] via 10.1.1.2, 00:30:59, Serial0/1
146.6.0.0/20 is subnetted, 1 subnets
O E2 146.6.0.0 [110/20] via 10.1.1.2, 00:30:59, Serial0/1
now apply redistribution into RIP from OSPF on Router A
router rip
version 2
redistribute ospf 1 metric 1
passive-interface Serial0/1
network 10.0.0.0
no auto-summary
D>sh ip rou
R 205.5.5.0/24 [120/1] via 10.1.1.9, 00:00:15, Serial0/1
206.6.6.0/28 is subnetted, 1 subnets
R 206.6.6.0 [120/1] via 10.1.1.9, 00:00:15, Serial0/1
R 5.0.0.0/8 [120/1] via 10.1.1.9, 00:00:15, Serial0/1
6.0.0.0/12 is subnetted, 1 subnets
R 6.0.0.0 [120/1] via 10.1.1.9, 00:00:15, Serial0/1
R 145.5.0.0/16 [120/1] via 10.1.1.9, 00:00:15, Serial0/1
10.0.0.0/30 is subnetted, 3 subnets
C 10.1.1.8 is directly connected, Serial0/1
R 10.1.1.0 [120/1] via 10.1.1.9, 00:00:15, Serial0/1
R 10.1.1.4 [120/1] via 10.1.1.9, 00:00:15, Serial0/1
146.6.0.0/20 is subnetted, 1 subnets
R 146.6.0.0 [120/1] via 10.1.1.9, 00:00:15, Serial0/1
we already set on router B to tag all the classless network into tag 1, and the rest to tag 2 and allow both of the tag to be redistribute from EIGRP 1 to OSPF 1 and from OSPF 1 to RIP. Now we want tag 1 only to be redistribute from OSPF to RIP.
create a route-map to match tag 1 only on router A
route-map CHECK_TAG permit 10
match tag 1
apply on the RIP
router rip
version 2
redistribute ospf 1 metric 1 route-map CHECK_TAG
passive-interface Serial0/1
network 10.0.0.0
no auto-summary
D>sh ip rou
206.6.6.0/28 is subnetted, 1 subnets
R 206.6.6.0 [120/1] via 10.1.1.9, 00:00:10, Serial0/1
6.0.0.0/12 is subnetted, 1 subnets
R 6.0.0.0 [120/1] via 10.1.1.9, 00:00:10, Serial0/1
10.0.0.0/30 is subnetted, 3 subnets
C 10.1.1.8 is directly connected, Serial0/1
R 10.1.1.0 [120/1] via 10.1.1.9, 00:00:10, Serial0/1
R 10.1.1.4 [120/1] via 10.1.1.9, 00:00:10, Serial0/1
146.6.0.0/20 is subnetted, 1 subnets
R 146.6.0.0 [120/1] via 10.1.1.9, 00:00:10, Serial0/1
notice, only tag 1, which is classless network only on the routing table
Below is the final configuration for all the routers
Router A conf
Router B conf
Router C conf
Router D conf
good and handy
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