Network Router User Manual

SmartSwitch Router User Reference Manual 115
Chapter 11: OSPF Configuration Guide
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 summary-range 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.
Specify the number of seconds
required to transmit a link state
update on an OSPF interface.
ospf set interface <name-or-IPaddr>|all
transit-delay
<num>
Specify the time a neighbor router
will listen for OSPF hello packets
before declaring the router down.
ospf set interface <name-or-IPaddr>|all
router-dead-interval
<num>
Disable IP multicast for sending OSPF
packets to neighbors on an OSPF
interface.
ospf set interface <name-or-IPaddr>|all
no-multicast
Specify the poll interval on an OSPF
interface.
ospf set interface <name-or-IPaddr>|all
poll-interval
<num>
Specify the identifier of the key chain
containing the authentication keys.
ospf set interface <name-or-IPaddr>|all
key-chain
<num-or-string>
Specify the authentication method to
be used on this interface.
ospf set interface <name-or-IPaddr>|all
authentication-method
none|simple|md5
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 broadcast|non-broadcast|
point-to-multipoint]