Table of Contents
Advertisement
Chapter 7: OSPF Configuration Guide
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.
To configure virtual links, enter the following commands in the Configure mode:
Create a virtual
link.
Set virtual link
parameters.
Configuring Autonomous System External (ASE) Link
Advertisements
These parameters specify the defaults used when importing OSPF AS External (ASE)
routes into the routing table and exporting routes from the routing table into OSPF ASEs.
To specify AS external link advertisements parameters, enter the following commands in
the Configure mode:
Specify the interval which AS
external link advertisements
will be generated and flooded
to an OSPF AS.
Specify the number of AS
external link advertisements
which will be generated and
flooded to an OSPF AS.
Specify AS external link
advertisement default
parameters.
88
ospf add virtual-link
<area-num>
[transit-area
ospf set virtual-link
[state disable|enable] [cost
[retransmit-interval
<num>
[priority
[router-dead-interval
ospf set export-interval
ospf set export-limit
ospf set ase-defaults [preference
[cost
[inherit-metric]
<number-or-string>
[neighbor
]
<number-or-string>
<num>
<num>
] [transit-delay
<num>
] [hello-interval
<num>
] [poll-interval
<num>
<num>
] [type
<num>
Internet Appliance User Reference Manual
<IPaddr>
]
]
<num>
]
]
<num>
]
<num>
<num>
]
]
Advertisement
Table of Contents
