Commands

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Module 6: OSPF

6.3.1

Configuring OSPF on routers within a single area

> Router(config)#router ospf process-id
> Router(config-router)#network network-address wild-card-mask area area-id

6.3.2

Optional configuration commands

> Configuring a Loopback Address:
> Router(config)#interface loopback number
> Router(config-if)#ip address ip-address subnet-mask
> Modifying OSPF Router Priority
> Router(config-if)#ip ospf priority number

6.3.3

Optional configuration commands (con’t)

> Router(config-if)#ip ospf cost number
> Router(config)#interface s(number)
> Router(config-if)#bandwidth (number)
> Configuring Authentication:
> Router(config-if)#ip ospf authentication-key password
> Router(config-router)#area number authentication [message-digest]
> Configuring OSPF Timers:
> Router(config-if)#ip ospf message-digest-key key-id md5 [encryption-type] password
> Router(config-if)#ip ospf hello-interval seconds
> Router(config-if)#ip ospf dead-interval seconds

6.3.5

Clear and Debug Commands

> Router#clear ip route {network [mask] | *}
> Router#debug ip ospf adj
> Router#debug ip ospf events
> Router#debug ip ospf flood
> Router#debug ip ospf lsa-generation
> Router#debug ip ospf packet
> Router#debug ip ospf retransmission
> Router#debug ip ospf spf
> Router#debug ip ospf tree

6.4.4

Point-to-Multipoint OSPF

> Router(config-if)#ip ospf network point-to-multipoint
> Router(config-if)#frame-relay map ip address dlci broadcast

6.6.2

Configuring OSPF route summarization

> Router(config-router)#area area-id range address mask
> Router(config-router)#summary-address address mask

6.6.3

Verifying multiarea OSPF operation

> Router#show ip ospf border-routers
> Router#show ip ospf virtual-links
> Router#show ip ospf process-id
> Router#show ip ospf database

6.7.3

Configuring stub and totally stubby areas

> Router(config-router)#area area-id stub [no-summary]
> Router(config-router)#area area-id default-cost cost

6.7.8

Configuring NSSA

> Router(config-router)#area area-id nssa [no-summary]
> Router(config-router)#summary-address prefix mask [not-advertise] [tag tag]

6.8.2

Configuring virtual links

> Router(config-router)#area area-id virtual-link router-id

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