Face intermittent ping failure

[charleskoh]

Hi Guys, i face intermittent ping failure to a server which is monitor using IP Sentry. But when i do a sh logging buffer on my 6509 switch, i nvr see the port which is connected to the server "leaves". Does that means that the physical connectivity is still there but somehow we just lose the net connection.

I've also sh counters on the port, it state 25 linkchange. but i cant seems to look for the date/time it has linkchange.

Are there any other more commands to troubleshoot this issue.

Pls advise on this.. need help badly

[lgijssel]

When you know that the linkstate-changecount was 25, you can deduct that the link has stayed up when the counter still reads 25 at any given later time.

Please do a sh int or show port and verifiy your speed/duplex settings. This command will also give you the amounts of errored frames. Check these for changes, if they increase rapidly, you probably have a cabling problem or some other layer2 issue.

Furthermore, you should inspect the data-path between the NMS and the server.

Regards,

Leo