Cisco commands to verify OSPF

The following commands are in addition to the Cisco commands used for RIP (see Example 7-39):

sh ip ospf neighbor Lists the OSPF neighbors of the current switch.

sh ip ospf database Provides a dump of the OSPF topology database, which includes all switches in the same area as the one where the command is issued.

Example 7-39 Cisco commands to verify OSPF

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, E - EGP

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 9.42.171.3 to network 0.0.0.0

9.0.0.0/24 is subnetted, 1 subnets

C9.42.171.0 is directly connected, GigabitEthernet0/24 10.0.0.0/24 is subnetted, 7 subnets

O10.10.0.0 [110/2] via 10.46.0.244, 00:25:13, Vlan46 [110/2] via 10.36.0.243, 00:25:13, Vlan36

O10.20.0.0 [110/2] via 10.46.0.244, 00:25:13, Vlan46

[110/2] via 10.36.0.243, 00:25:13, Vlan36

C10.46.0.0 is directly connected, Vlan46

O10.45.0.0 [110/2] via 10.46.0.244, 00:25:13, Vlan46

O10.35.0.0 [110/2] via 10.36.0.243, 00:25:13, Vlan36

C 10.36.0.0 is directly connected, Vlan36

C 10.99.0.0 is directly connected, GigabitEthernet0/24

S* 0.0.0.0/0 [1/0] via 9.42.171.3

 

 

 

Core2#sh

ip ospf neighbor

 

 

 

Neighbor

ID

Pri

State

Dead Time

Address

Interface

9.42.171.244

1

FULL/DR

00:00:31

10.46.0.244

Vlan46

10.10.0.243

1

FULL/BDR

00:00:39

10.36.0.243

Vlan36

Core2#sh ip ospf database

OSPF Router with ID (10.56.0.246) (Process ID 9)

Router Link States (Area 0.0.0.9)

Link ID

ADV Router

Age

Seq#

Checksum Link count

9.42.171.243

9.42.171.243

1750

0x80000012

0x00AC14 4

9.42.171.244

9.42.171.244

1567

0x80000017

0x006D2D 4

10.10.0.243

10.10.0.243

1537

0x80000003

0x00491C 4

10.56.0.246

10.56.0.246

1532

0x80000010

0x0023D5 2

Net Link States (Area 0.0.0.9)

 

 

Link ID

ADV Router

Age

Seq#

Checksum

10.10.0.244

9.42.171.244

1577

0x80000007

0x00405B

10.20.0.244

9.42.171.244

1577

0x80000007

0x00C7C9

136Nortel Networks L2/3 Ethernet Switch Module for IBM Eserver BladeCenter

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IBM L2/3 manual Example 7-39 Cisco commands to verify Ospf