Verify that you do not have the same IP address and subnet mask defined for
both the interface and subinterface on the router that you are pinging from.
Try pinging to remote device (versus the remote router interface) and if you
have no packet loss, then the FR is not the problem. You mentioned that the
problem is specifically with pings...so my best guess diagnosis follows.
If you ping router to router across the serial and see alternating 40/60%
packet loss...it is probably a misconfiguration similar to this:
Serial0 is up, line protocol is up
Hardware is HD64570
Internet address is 10.0.0.22 255.255.255.252
Serial0.1 is up, line protocol is up
Hardware is HD64570
Internet address is 10.0.0.22 255.255.255.252
Explanation would be that pings to 10.0.0.21 would be load balanced across
both the serial interface and the 0.1 subinterface, but only the
subinterface would correctly point to the FR DLCI. Routes learned via
routing protocols (i.e. routes to the remote subnets) would have been
learned over the subinterface and thus route all traffic over the
subinterface resulting in the difference in packet loss (40/60 vs 0) over
the same circuit.
Anson
----Original Message Follows----
From: [EMAIL PROTECTED]
Reply-To: [EMAIL PROTECTED]
To: <[EMAIL PROTECTED]>
Subject: Figure this one out!!! (damn telco)
Date: Wed, 16 Aug 2000 15:34:50 EDT
Hey Group,
Got another issue for you all to give opinions on. We have a client's
router attached to the telco's FR cloud. We seem to have a problem with
strickly the ping command. When we ping an IP in the telco's net, we get
dropped packets. Maybe 60% will go through. Then maybe 100%, and so on. When
other traffic goes through the line everything is normal. The telco said
that there is not a problem on their side and they don't see anything wrong
(as usual). We have looked at everything, ACL's, CIR's, DE bits. We cant
figure why this is happening and why packets are being dropped, especially
at the low rate of traffic that is being sent. It almost seems like when you
grab a water hose and bend it to stop the water from flowing and then let it
go the let the water flow again...strange stuff. What do you all think.
Mark Z ~ CCNA, CCDA
Unisys e-@ction net manag. services
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