Configuring Ospf Area Parameters; Creating Virtual Links - Cabletron Systems SmartSwitch Router User's Reference Manual

Add a stub host to an OSPF area.
Add a network to an OSPF area for
summarization.

Configuring OSPF Area Parameters

The SSR allows configuration of various OSPF area parameters, including stub areas, stub
cost and authentication method. Stub areas are areas into which information on external
routes is not sent. Instead, there is a default external route generated by the ABR, into the
stub area for destinations outside the autonomous system. Stub cost specifies the cost to
be used to inject a default route into a stub area. An authentication method for OSPF
packets can be specified on a per-area basis.
To configure OSPF area parameters, enter the following commands in the Configure
mode.
Specify an OSPF stub area.
Specify the cost to be used to inject a
default route into an area.
Specify the authentication method
to be used by neighboring OSPF
routers.

Creating Virtual Links

In OSPF, virtual links can be established:
• To connect an area via a transit area to the backbone
• To create a redundant backbone connection via another area
Each Area Border Router must be configured with the same virtual link. Note that virtual
links cannot be configured through a stub area.
SmartSwitch Router User Reference Manual
Chapter 9: OSPF Configuration Guide
ospf add stub-host [to-area
addr>
|backbone]
<num>
[cost ]
ospf add network
<area-addr>
|backbone] [restrict]
[host-net]
<area-num>
ospf set area
<area-num>
ospf set area
<area-num>
ospf set area
[authentication-method
none|simple|md5]
<area-
<IPaddr/mask>
[to-area
stub
<num>
stub-cost
[stub]
119