Ospf Virtual Links - Bay Networks NauticaRS Reference Manual

NauticaRS 5.5R Reference Guide

OSPF Virtual Links

18-8
When administering OSPF areas, there are times when an area
has no direct link into Area 0 (the backbone). Originally this
meant that the area that cannot find Area 0 is not part of the OSPF
network.
Now, virtual links allow you to link these "lost" areas into the
backbone (Area 0) via another area known as a transit area.
Virtual links are set-up in the ospf# object. Move into the ospf#
object using the following syntax:
[co] ip os
Where co moves BCC into config mode (if required), ip takes the
router into the IP context and os moves you to the ospf# object.
Using the ls -l command at the ospf# object prompt lists any
objects that have been created already. Create a virtual link using
the following syntax:
[co] [ip] [os] vl routerid/transitareaid
Where co moves BCC into config mode (if it is not there already),
ip takes the router into the IP context (if it is not there already), os
moves you to the ospf# object prompt (if it is not there already),
vl is the MTD for Virtual Link, routerid is the ID for the router
that connects to Area 0 and transitareaid is the ID of the Area
you have to pass through to reach the router specified in the
routerid.
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