At a fairly basic level, take a look at the pings which aren't timing out. Are
those pings replying quickly, or are they all nearly timing out?
If you're getting bad response from all your pings, look at things like line
quality - as Dave says, check carrier transitions, dropped packets, and also
check for input errors.
If, on the other hand, you are seeing several quick ping responses followed by a
ping that times out, particularly if it is a regular pattern, check your
routing. If you have multiple routes to a destination, and one of them heads
off into a loop or a black hole, this is what you'll see.
JMcL
---------------------- Forwarded by Jenny Mcleod/NSO/CSDA on 16/08/2000 09:00 am
---------------------------
David Jones <[EMAIL PROTECTED]> on 15/08/2000 10:11:39 pm
Please respond to David Jones <[EMAIL PROTECTED]>
To: "'H.K Braimoh'" <[EMAIL PROTECTED]>
[EMAIL PROTECTED]
cc: (bcc: JENNY MCLEOD/NSO/CSDA)
Subject: RE: Intermittent loss of connectivity
You can check the interface of the router to see if it is getting carrier
transitions or dropping packets. I ran into something similiar once at a
customer's. I set up a new site for them and they supplied the ip
addresses. Come to find out, the ethernet ip's they gave me for the new
site were in use somewhere else. So now, we had two routes going two
different places for the same subnet. Readdressed the new site and took out
the duplicate route.
Dave
-----Original Message-----
From: H.K Braimoh [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, August 15, 2000 6:04 AM
To: [EMAIL PROTECTED]
Subject: Intermittent loss of connectivity
Hi all, I am troubleshooting connectivity problems we have to one of our
sites. there is continuous flapping on the link. For every 5 or 6 ping
requests at least one or two times out. the sites are linked via FRA-ATM,
the router on site is a 2500, has anyone had a similar experience? or has
anyone got any suggestions on where to start troubleshooting?
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