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Cisco IOS XR Training Page 95

RP/0/RSP0/CPU0:R2(config)#router ospf R3R4

RP/0/RSP0/CPU0:R2(config-ospf)#vrf R3R4

Now, lets see what Domain-id types we have – See RFC 4577 for more info on

these.

RP/0/RSP0/CPU0:R2(config-ospf-vrf)#domain-id type ?

0005 Type 0x0005

0105 Type 0x0105

0205 Type 0x0205

8005 Type 0x8005

RP/0/RSP0/CPU0:R2(config-ospf-vrf)#domain-id type 0005 value ?

WORD OSPF domain ID ext. community value in Hex (6 octets)

Now lets set it to a value

RP/0/RSP0/CPU0:R2(config-ospf-vrf)#domain-id type 0105 value AABBCCDDEEFF

When you do this, the routes on CE are now E2 routes:

CE1#sh ip route

Codes: C - connected, S - static, 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

i - IS-IS, su - IS-IS summary, 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

10.0.0.0/8 is variably subnetted, 4 subnets, 2 masks

C 10.1.13.0/24 is directly connected, FastEthernet0/0

C 10.3.3.3/32 is directly connected, Loopback0

O E2 10.4.4.4/32 [110/2] via 10.1.13.1, 01:04:24, FastEthernet0/0

O E2 10.1.24.0/24 [110/1] via 10.1.13.1, 01:04:24, FastEthernet0/0

CE1#

This can also work in reverse, if you want to create a SuperBackbone but the

OSPF processes are different, you can set the domain-id to be the same.

RP/0/RSP0/CPU0:R1(config-ospf-vrf)#domain-id type 0105 value AABBCCDDEEFF

CE1#sh ip route

Codes: C - connected, S - static, 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

i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS

ia - IS-IS inter area, * - candidate default, U - per-user

o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

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