[28641] in North American Network Operators' Group
Strange result while ping serial interface
daemon@ATHENA.MIT.EDU (Yu Ning)
Wed May 10 21:41:57 2000
Message-ID: <008301bfbae9$9fc69080$9c0361ca@odie_ibm.chinanet.cn.net>
From: "Yu Ning" <yuning@cndata.com>
To: "nanog-post" <nanog@merit.edu>
Date: Thu, 11 May 2000 09:37:20 +0800
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Hi nanog,
Strange thing happens everyday. When I were troubleshooting yestoday,
I found a ping to my local serial interface (no matter it's 155M POS,
or 2M Serial interface) takes nearly twice delay compared with a ping
to the remote side of the serial interrface ! When I trace to my local
serial interface, I got the first hop to the remote end, then second
hop back to my local interface !
For example, 202.97.2.1 is local serial interface, while 2.2 is remote
side. A trace on 2.1 to 2.1 first go to 2.2, then back to 2.1. And this
situation can be verified on both side.
Have you ever seen this situation ? Is it due to our misconfiguration?
or it's sheerly a mis-display of result in Cisco box (can't believe it)
The background is: we're using ISIS as IGP, and utilized level-1/2 link.
thanks for any input.
regards,
Yu Ning
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(Mr.) Yu(2) Ning(2)
ChinaNet Backbone Operation
Networking Dep.,Datacom Bureau
China Telecom.,Beijing(100088),P.R.C
+86-10-66418121/66418122/66418123(fax)
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