Cabletron Systems SmartSwitch manual Configuring an Ospf Area, Create an Ospf area

Chapter 9: 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

Configuring 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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