From: Greg Schmitt (gschmitt@xxxxxxxxxxxxx)
Date: Fri Jul 12 2002 - 16:30:17 GMT-3
This is the same issue you will see with OSPF on frame relay networks. The inte
rface type must match on both ends, or you will not
get adjacency.
Cheers,
Greg
Greg Schmitt, CCIE #8105
Internetwork Solutions Engineer
ThruPoint, Inc.
Cell: 443-822-5183
IM: GregThruPoint
email: GSchmitt@thrupoint.net
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Jonathan V Hays
Sent: Friday, July 12, 2002 2:17 PM
To: ccielab@groupstudy.com
Subject: ISIS - subinterface needed?
Group,
I just had an interesting experience configuring ISIS on two routers.
One router (R1) had two serial subinterfaces, one of which was
point-to-point to another router running ISIS (R2). Now R2 was not
configured with subinterfaces, just "interface serial 0" since it was
only connected to R1 (via frame relay). I could not get ISIS routes to
appear in the routing tables of either router.
After I changed R2 to a point-to-point subinterface the ISIS routes
popped into both routing tables.
The question is, why is the point-to-point subinterface necessary on
both ends for ISIS to propagate routes?
Jonathan
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