[51264] in North American Network Operators' Group
Re: sanity check frame question
daemon@ATHENA.MIT.EDU (alex@yuriev.com)
Thu Aug 22 11:06:23 2002
Date: Thu, 22 Aug 2002 11:04:28 -0400 (EDT)
From: alex@yuriev.com
To: Stephen Sprunk <ssprunk@cisco.com>
Cc: Brennan_Murphy@NAI.com, nanog@merit.edu
In-Reply-To: <00b001c249e5$14decf40$dd876540@amer.cisco.com>
Errors-To: owner-nanog-outgoing@merit.edu
> > I have a Frame connection between two sites, A and B. If the router
> > crashes at B, wouldn't A still see the DLCI for
> > B? Is there any scenario where this wouldn't be the case? If
> > B gets blown off the map, shouldnt A's frame interface be
> > in at least an up/down scenario?
>
> In theory, when the remote LMI goes down, or any part of the PVC internal to the
> carrier goes down, the local LMI should go INACTIVE. In practice, this is
> unreliable at best; for some carriers, you will always get ACTIVE status no
> matter what.
For a real frame relay (not the frame relay on customer end that terminates
into the ATM circuit on your end) if you want the interface to go up/down or
down/down when there is a problem on a line, you must configure frame relay
using sub-interfaces. Works like a charm.
Alex
