IS-IS on mains and subs...

From: Jonathan R. Charles (jrcdehc@ameritech.net)
Date: Sun Sep 05 2004 - 03:10:19 GMT-3


Quicky scenario.

 

No main interfaces on hub router, no subinterfaces on spokes.

 

Set up IS-IS between main and one of the spokes (which is is a
point-to-point).

 

Now, you will get a network type mismatch between a multipoint (the main)
and a ptp (the sub).

 

I have seen two methods on how to fix this.

 

First, create a tunnel between the hub and spoke. Fine, a little clunky, but
it works.

 

Second, say 'screw it' and make the ptp sub on the hub into a multipoint and
just connect normally.

 

Now, both will work.

 

Which one would you recommend, or is there a third method my slowly
shrinking brain hasn't thought of?

 

 

 

 

 

Jonathan Charles

SBC

CCNP/CCDP, NNCSE, NNCSS, MCSE



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