From: ccie2be (ccie2be@nyc.rr.com)
Date: Mon Jun 28 2004 - 12:12:34 GMT-3
Hi guys,
What's the advantage or disadvantage of using a virtual link to connect a
discontinuous ospf backbone area vs using a tunnel to do the same thing?
Besides the authentications available with a virtual link, are there any other
differences?
Also, let's assume I wanted to use a tunnel in the following scenario:
Area0 --- s0 Rx E0 --- Area xy --- fa0/1 Ry s1 --- Area0
Rx and Ry share a common ethernet subnet and each also has a loopback0
interface.
What should the endpoints of the tunnel be?
Should any pair of endpoints work as long as they're consistent on both Rx and
Ry? Why yes or no?
Does it matter what area the physical or loopback interfaces endpoints of the
tunnel are assigned to?
I know that when the loopback interfaces are put in area 0 and the ip addr of
the tunnel itself is assigned to area 0, this config works. But, I tried
other which didn't work but I don't understand why.
Could someone explain why that is?
TIA, Tim
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