Switch command

There is no easy way to do this. To make a long story short, you would need to configure proper logging for ports (spantree logging will do this), and either have a long enough log, or send logging to a server for your review. Since arp/mac tables age out after a few minutes at the longest, there is no way to determine what was plugged in, or when it went dead, without proper logging.

Learn something new everyday I guess. I haven't run 4000s for a long time, and the command doesn't appear to be available on 6500s or IOS based switches....but thanks for the info!

I just tested it on a couple of other switches and it is only 4000. How lame of cisco to not add that to all IOS based switches. Its a real easy way to find an avaible port when you have cables in all ports.

SWITCH01#show int link

Port Name Down Time Gi1/1 00 secs Gi1/2 00 secs Fa2/1 1 year, 2 days, 20 hours, 53 minutes 48 secs Fa2/2 6 days, 20 hours, 54 minutes 38 secs Fa2/3 PIX to Greenleaf 00 secs Fa2/4 1 year, 12 weeks, 5 days, 14 hours, 47 minutes 14 secs Fa2/5 00 secs Fa2/6 00 secs Fa2/7 00 secs Fa2/8 00 secs Fa2/9 1 year, 12 weeks, 5 days, 14 hours, 47 minutes 14 secs Fa2/10 00 secs Fa2/11 1 year, 12 weeks, 5 days, 14 hours, 47 minutes 14 secs Fa2/12 1 year, 12 weeks, 5 days, 14 hours, 47 minutes 14 secs Fa2/13 3 days, 22 hours, 30 minutes 26 secs Fa2/14 00 secs Fa2/15 00 secs Fa2/16 00 secs Fa2/17 00 secs Fa2/18 00 secs Fa2/19 13 weeks, 6 days, 1 hour, 47 minutes 06 secs Fa2/20 00 secs Fa2/21 2 weeks, 23 hours, 6 minutes 58 secs Fa2/22 1 year, 12 weeks, 5 days, 14 hours, 47 minutes 14 sec

this info is available thru an snmp read of the interfaces ; currently use it on 6509's and 3750 ,