Hi Jesse
On 06.11.2008, at 16:31, [EMAIL PROTECTED] wrote:
Classification: NATO UNCLASSIFIED - RELEASABLE TO INTERNET
Fritz,
This sounds a lot like a monitoring problem we are trying to solve
here.
Do you know how we would know if a DFE in an E7 chassis fails in the
"stack"? We had this happen in one switch with two DFEs. One died,
but we
had no alarm or warning until the users complained about the loss of
connectivity.
This is a very interesting question, which we were faced with several
times
in the past ... especially when we lost one module due to hardware
faults.
The simplest solution to this is to keep one local number of
interfaces in your
nms system (which is Spectrum in our case) and compare this number to
the
actual ifnumber attribute. So if the actual ifnumber counter is less
than the
local counter, you either have removed one module from the chassis or
you
must have lost one module. So if you keep the local number up to date
with
all changes in your chassis', then you really get correct alarm events
when
modules fail. Since we have this solution with Spectrum in operation,
we have
had at least two or three cases, when we had red alarms pointing us to
crashed modules in DFE chassis.
Best regards,
--Fritz.
___________________________
University of Bern
Computer Services Department
Fritz Buetikofer
Senior IT Manager
Gesellschaftsstrasse 6
CH-3012 Bern
Switzerland
Tel. +41 (0)31 631 3843
Fax. +41 (0)31 631 3865
Web. http://www.id.unibe.ch
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