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Cisco OSPF Route Redistribution

Configuration Example 7: Modifying the Metric of Redistributed Routes Using a Route Map

In the first configuration example for Figure 14-3, the EIGRP routes were redistributed into OSPF with a default metric of 20. For this example, modify the configuration on Router B to change the metric of the classful routes to 100 and the metric of the classless routes to 200.

Router B
router ospf 1
 redistribute eigrp 1 subnets route-map control-eigrp
!
access-list 1 permit 6.0.0.0 0.15.255.255
access-list 1 permit 146.6.0.0 0.0.15.255
access-list 1 permit 206.6.6.0 0.0.0.15
access-list 1 permit 10.1.1.4 0.0.0.3
route-map control-eigrp permit 10
 match ip address 1
 set metric 200
!
route-map control-eigrp permit 20
 set metric 100

Verification

Verify that the new metric has been applied to the redistributed EIGRP routes. On Router A you can look at the IP routing table and the OSPF database.

rtrA#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
    D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
    N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
    E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
    i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
    * - candidate default, U - per-user static route, o - ODR
    P - periodic downloaded static route
Gateway of last resort is not set
   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 [110/100] via 10.1.1.2, 00:01:53, Serial0/1
   206.6.6.0/28 is subnetted, 1 subnets
O E2  206.6.6.0 [110/200] via 10.1.1.2, 00:01:53, Serial0/1
O E2 5.0.0.0/8 [110/100] via 10.1.1.2, 00:01:53, Serial0/1
   6.0.0.0/12 is subnetted, 1 subnets
O E2  6.0.0.0 [110/200] via 10.1.1.2, 00:01:53, Serial0/1
   172.16.0.0/24 is subnetted, 1 subnets
C    172.16.1.0 is directly connected, Ethernet0/0
O E2 145.5.0.0/16 [110/100] via 10.1.1.2, 00:01:54, Serial0/1
   10.0.0.0/30 is subnetted, 2 subnets
C    10.1.1.0 is directly connected, Serial0/1
O E2  10.1.1.4 [110/200] via 10.1.1.2, 00:01:55, Serial0/1
   146.6.0.0/20 is subnetted, 1 subnets
O E2  146.6.0.0 [110/200] via 10.1.1.2, 00:01:55, Serial0/1
rtrA#show ip ospf database external 5.0.0.0
      OSPF Router with ID (1.1.1.1) (Process ID 1)
        Type-5 AS External Link States
 Routing Bit Set on this LSA
 LS age: 254
 Options: (No TOS-capability, DC)
 LS Type: AS External Link
 Link State ID: 5.0.0.0 (External Network Number )
 Advertising Router: 2.2.2.2
 LS Seq Number: 80000002
 Checksum: 0x8BB6
 Length: 36
 Network Mask: /8
    Metric Type: 2 (Larger than any link state path)
    TOS: 0
    Metric: 100
    Forward Address: 0.0.0.0
    External Route Tag: 0
rtrA#show ip ospf database external 206.6.6.0
      OSPF Router with ID (1.1.1.1) (Process ID 1)
        Type-5 AS External Link States
 Routing Bit Set on this LSA
 LS age: 297
 Options: (No TOS-capability, DC)
 LS Type: AS External Link
 Link State ID: 206.6.6.0 (External Network Number )
 Advertising Router: 2.2.2.2
 LS Seq Number: 80000003
 Checksum: 0x51C4
 Length: 36
 Network Mask: /28
    Metric Type: 2 (Larger than any link state path)
    TOS: 0
    Metric: 200
    Forward Address: 0.0.0.0
    External Route Tag: 0
8. Configuration Example 8: Modifying the Metric Type of Redistributed Routes Using a Route Map | Next Section Previous Section