Interface resets on a down line

Unanswered Question
Jul 19th, 2007


Why does my router get interface resets although the line is down?

Serial1 is up, line protocol is down

Hardware is HD64570


Internet address is

MTU 1500 bytes, BW 64 Kbit, DLY 20000 usec, rely 255/255, load 1/255

Encapsulation HDLC, loopback not set, keepalive set (10 sec)

0 output errors, 0 collisions, 235 interface resets



I have this problem too.
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spremkumar Thu, 07/19/2007 - 01:04


Can you confirm whether the link connected on serial 1 is flapping(fluctuating) ?

Have you observed any interface flap messages on the logs ?


willemvwyk Thu, 07/19/2007 - 02:34

I can't really confirm that the line is not flapping. Although the logs don't indicate the line flapping severely. It shows about 10 flaps, but the "clear counters" time shows over 3 hours and the interface resets are at 200 odd? I find that very weird. I know interface resets are to do with line flaps, but in this instance, the line flaps and interface resets do not correspond. I have few line flaps and many interface resets.




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