The connection is actually from OSPF router ID ( RID ) to router i.d.
In the case of Doyle, his example is so nicely numbered that the RIDs and
the loopback addresses are the same. ;->
I am guessing that this is one of the gotcha's that evil lab proctors might
throw into the break-fix, or maybe one of the gotcha's that may cause the
loss of points in the early phases of the lab.
In the CCIE Lab prep advice I have been circulating
www.chuck.to/CCIEAdvice.txt ) two different CCIE's mention the value of
preparing a solid IP addressing scheme prior to beginning lab configuration.
One of them warns about issues like changing RID's when routers are reloaded
during the lab ( and in real life too :-> )
Chuck
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of
Keith Townsend
Sent: Thursday, November 09, 2000 11:01 AM
To: [EMAIL PROTECTED]
Subject: OSPF Area virtual links
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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