Router#test interfaces serial 0

Unanswered Question
Aug 23rd, 2007

Hi, i get this message when testing the serial 0 interface:

Router#test interfaces serial 0

... Failed - timeout problem

What could it be?


I have this problem too.
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jbohla Wed, 08/29/2007 - 14:12

I think you have to increase the time-out if the device is remote, and reduce time-out errors if the problem is on the network.

mohammedmahmoud Wed, 08/29/2007 - 15:03


The test interfaces EXEC command is intended for the factory checkout of network interfaces. It is not intended for diagnosing problems with an operational router, i've used it and i got the same results you've got. The test interfaces output does not report correct results if the router is attached to a "live" network. For each network interface that has an IP address that can be tested in loopback (MCI and ciscoBus Ethernet and all serial interfaces), the test interfaces command sends a series of ICMP echoes. Error counters are examined to determine the operational status of the interface.


Mohammed Mahmoud.


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