Cisco Router Challenge 35

Outline

This challenge involves the configuration of OSPF. The objectives of this challenge are to:

• Setup OSPF
• Define networks within a given area.
• Define OSPF parameters.

Commands

> en

# config t

(config)# router ospf 146

(config-router)# network 211.79.208.0 0.0.0.255 area 0

(config-router)# network 130.184.0.0 0.0.0.255 area 0

(config-router)# network 206.198.48.0 0.0.0.255 area 0

(config-router)# area 0 range 192.168.64.0 255.255.255.0

(config-router)# exit

(config)# int e0

(config-if)# ip address 211.79.215.7 255.255.255.0

(config-if)# ip ospf hello-interval 26

(config-if)# ip ospf dead-interval 9

Example

> en

# config t

(config)# router ospf ?

<1-65535> Process ID

(config)# router ospf 146

(config-router)# ?

Router configuration commands:

area OSPF area parameters

auto-cost Calculate OSPF interface cost according to bandwidth

capability Enable specific OSPF feature

compatible OSPF compatibility list

default Set a command to its defaults

default-information Control distribution of default information

default-metric Set metric of redistributed routes

discard-route Enable or disable discard-route installation

distance Define an administrative distance

distribute-list Filter networks in routing updates

domain-id OSPF domain-id

domain-tag OSPF domain-tag

exit Exit from routing protocol configuration mode

help Description of the interactive help system

ignore Do not complain about specific event

log-adjacency-changes Log changes in adjacency state

maximum-paths Forward packets over multiple paths

neighbor Specify a neighbor router

network Enable routing on an IP network

no Negate a command or set its defaults

passive-interface Suppress routing updates on an interface

redistribute Redistribute information from another routing protocol

router-id router-id for this OSPF process

summary-address Configure IP address summaries

timers Adjust routing timers

traffic-share How to compute traffic share over alternate paths

(config-router)# network 211.79.208.0 0.0.0.255 area 0

(config-router)# network 130.184.0.0 0.0.0.255 area 0

(config-router)# network 206.198.48.0 0.0.0.255 area 0

(config-router)# area ?

<0-4294967295> OSPF area ID as a decimal value

A.B.C.D OSPF area ID in IP address format

(config-router)# area 0 ?

authentication Enable authentication

default-cost Set the summary default-cost of a NSSA/stub area

nssa Specify a NSSA area

range Summarize routes matching address/mask (border routers only

stub Specify a stub area

virtual-link Define a virtual link and its parameters

(config-router)# area 0 range ?

A.B.C.D IP address to match

(config-router)# area 0 range 192.168.64.0 ?

A.B.C.D IP mask for address

(config-router)# area 0 range 192.168.64.0 255.255.255.0

(config-router)# exit

(config)# int e0

(config-if)# ip address 211.79.215.7 255.255.255.0

(config-if)# ip ospf ?

authentication Enable authentication

authentication-key Authentication password (key)

cost Interface cost

database-filter Filter OSPF LSA during synchronization and flooding

dead-interval Interval after which a neighbor is declared dead

demand-circuit OSPF demand circuit

hello-interval Time between HELLO packets

message-digest-key Message digest authentication password (key)

mtu-ignore Ignores the MTU in DBD packets

network Network type

priority Router priority

retransmit-interval Time between retransmitting lost link state

advertisements

transmit-delay Link state transmit delay

(config-if)# ip ospf hello-interval ?

<1-65535> Seconds

(config-if)# ip ospf hello-interval 26

(config-if)# ip ospf dead-interval 9