You use the router ID of the remote router in the
virtual link command. This will be the highest IP on a
loopback interface. If you have multiple routers in a
area use the show ip ospf commands to find out what
the router ID is the router is forming an adjanency
with, and used that for the virtual link command
otherwise it will not come up. You should also reboot
or stop your process and restart it so the OSPF
process's and router IDs are correct. This way if you
set up a virtual link on a new configuration and don't
reboot and get it working, then go away... and at a
later time the router reboots your virtual link router
ID is correct.
- Keith Townsend <[EMAIL PROTECTED]> wrote:
> When creating a virtual link between an ABR
> non-directly connected are to an
> ABR in the backbone should you always use the
> loopback address for the
> virtual link. Doyle does this on page 943 of his
> Routing TCP/IP book.
> Secondly is there a route to the loopback of these
> two routers. Maybe I'm
> forgetting something but how do the two routers find
> routes to each other if
> you're not advertising L0 and there is no static
> routes to the L0.
>
> Thanks,
>
> Keith
>
>
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