Cabletron Systems SmartSwitch Router, User'S Reference Manual

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SmartSwitch Router User Reference Manual 119
Chapter 9: OSPF Configuration Guide
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.
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.
Add a stub host to an OSPF area.
ospf add stub-host [to-area
<area-
addr>
|backbone]
[cost
<num>
]
Add a network to an OSPF area for
summarization.
ospf add network
<IPaddr/mask>
[to-area
<area-addr>
|backbone] [restrict]
[host-net]
Specify an OSPF stub area.
ospf set area
<area-num>
stub
Specify the cost to be used to inject a
default route into an area.
ospf set area
<area-num>
stub-cost
<num>
Specify the authentication method
to be used by neighboring OSPF
routers.
ospf set area
<area-num>
[stub]
[authentication-method
none|simple|md5]