3524 Interface change? 1

[jkeeper]

I would ge greatfull for any information regarding this problem.


On our 3524 with only 10 users (LAN) we noticed that 2 of the port 2 and 4 showed interface changes. Port 2 showed 7 interface changes and port 4 showed 3 changes.

What does this mean? If none of the Admins made the changes,
and how can we find more information about these changes and can this be monitored.

Jkeeper

 

[hexn]

When you say interface changes, you mean like "interface changed state to up/down" right?

This just means that the interface was no longer receiving an electrical signal from the wire. So if you have a user who is plugged into the switch, and the user shuts down, or restarts their computer, this will cause the interface to change states, because it will lose signal, and then see a signal again when the computer boots up. This is the same thing as seeing a link light on an ethernet interface. The light goes off when the interface changes state to down, and the light comes on when it changes state to up.

I hope that answered your question, let me know further details if it did not.

 

[jkeeper]

Thanks Shnypb,

I did notice that it is an Interface reset rather than
interface change. Is this this the same as you explained so well?

Jkeeper

 

[hexn]

An interface reset is a little different, but an interface reset can be caused by someone rebooting their computer.

This from my switching FAQ located at:

http://www.tek-tips.com/faqs.cfm?spid=558&sfid=1337&CFID=33501312&CFTOKEN=45355679

interface resets
Number of times an interface has been completely reset. This can happen if packets queued for transmission were not sent within several seconds. On a serial line, this can be caused by a malfunctioning modem that is not supplying the transmit clock signal, or by a cable problem. If the system notices that the carrier detect line of a serial interface is up, but the line protocol is down, it periodically resets the interface in an effort to restart it. Interface resets can also occur when an interface is looped back or shut down.

 

[jkeeper]

OK, I think I understand.

One of the Machines OS NT2K, nic settings "hardware default" and the switch 3524 was set to half duplex /10. That would account for one of the resets, but 4 resets leads me to believe the reasons you gave. I will do a test and clear the counters and reboot the machine four times to see if it will repeat the reset. Thanks for your help.