Chapter 5: OSPF Configuration Guide

Specify the number of seconds

ospf set interface <name-or-IPaddr>all

required to transmit a link state

transit-delay <num>

update on an OSPF interface.

 

 

 

Specify the time a neighbor router

ospf set interface <name-or-IPaddr>all

will listen for OSPF hello packets

router-dead-interval <num>

before declaring the router down.

 

 

 

Disable IP multicast for sending OSPF

ospf set interface <name-or-IPaddr>all

packets to neighbors on an OSPF

no-multicast

interface.

 

 

 

Specify the poll interval on an OSPF

ospf set interface <name-or-IPaddr>all

interface.

poll-interval <num>

 

 

Specify the identifier of the key chain

ospf set interface <name-or-IPaddr>all

containing the authentication keys.

key-chain<num-or-string>

 

 

Specify the authentication method to

ospf set interface <name-or-IPaddr>all

be used on this interface.

authentication-method

 

nonesimplemd5

 

 

Configure an OSPF Area

OSPF areas are a collection of subnets that are grouped in a logical fashion. These areas communicate with other areas via the backbone area. Once OSPF areas are created, you can add interfaces, stub hosts, and summary ranges to the area.

In order to reduce the amount of routing information propagated between areas, you can configure summary-ranges on Area Border Routers (ABRs). On the SSR, summary-ranges are created using the ospf add network command – the networks specified using this command describe the scope of an area. Intra-area Link State Advertisements (LSAs) that fall within the specified ranges are not advertised into other areas as inter-area routes. Instead, the specified ranges are advertised as summary network LSAs.

To create areas and assign interfaces, enter the following commands in the Configure mode.

Create an OSPF area.

ospf

create area <area-num>backbone

 

 

 

Add an interface to an OSPF area.

ospf

add interface <name-or-IPaddr>

 

[to-area <area-addr>backbone]

 

[type broadcastnon-broadcast]

 

 

 

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SmartSwitch Router User Reference Manual

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Cabletron Systems 9032578-02 manual Configure an Ospf Area, Create an Ospf area, Add an interface to an Ospf area

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