Strange ping on management vlan 2950

[pedram rabeti]

Hi,

I have packet lost on many port on 2950 switch . When Check out the problem i see the management vlan have very  strange ping .

Ever seen such a thing :

Please attention to the ping time !! ( raise at each packet and then normal )

bytes=32 time=98ms TTL=255
bytes=32 time=2ms TTL=255
bytes=32 time=121ms TTL=255
bytes=32 time=2ms TTL=255
bytes=32 time=137ms TTL=255
bytes=32 time=2ms TTL=255
bytes=32 time=157ms TTL=255
bytes=32 time=2ms TTL=255
bytes=32 time=171ms TTL=255
bytes=32 time=2ms TTL=255
bytes=32 time=190ms TTL=255
bytes=32 time=2ms TTL=255
bytes=32 time=210ms TTL=255
bytes=32 time=2ms TTL=255
bytes=32 time=234ms TTL=255
bytes=32 time=2ms TTL=255
bytes=32 time=229ms TTL=255
bytes=32 time=2ms TTL=255
bytes=32 time=258ms TTL=255
bytes=32 time=2ms TTL=255
bytes=32 time=272ms TTL=255
bytes=32 time=2ms TTL=255
bytes=32 time=278ms TTL=255
bytes=32 time=2ms TTL=255
bytes=32 time=303ms TTL=255
bytes=32 time=2ms TTL=255
bytes=32 time=320ms TTL=255
bytes=32 time=2ms TTL=255
bytes=32 time=335ms TTL=255
bytes=32 time=2ms TTL=255
bytes=32 time=340ms TTL=255
bytes=32 time=2ms TTL=255
bytes=32 time=361ms TTL=255
bytes=32 time=2ms TTL=255
bytes=32 time=359ms TTL=255
bytes=32 time=2ms TTL=255
bytes=32 time=376ms TTL=255
bytes=32 time=2ms TTL=255
bytes=32 time=2ms TTL=255
bytes=32 time=2ms TTL=255
bytes=32 time=2ms TTL=255

Thank you

Pedram Rabeti
 

[devils_advocate · Accepted solution]

Looking at the Round Trip Time to the Management Address on a Switch is not a reliable method of working out performance as the switch will treat ICMP packets with low priority.

What sort of responses do you get when you ping from one host to another on the SAME switch?

Have you checked the processor and memory usage of the switch?

Thanks

[pedram rabeti]

Hi ,

Thank you for replay

Ping to another host is normal except 2 port connect  to 2 different network .

At this port with problem i have packet lost , when packet lost happen the activity LED on interface is off and then on .( for a second everything ok then packet lost happen and LED off for 1 sec and on for 5 sec ).

A movie of problem :

https://www.youtube.com/watch?v=eUl4ifveh74&feature=youtu.be

The processor and memory is normal .

Pedram Rabeti

[schaef350 · Accepted solution]

If your concerned about traffic traversing the switch I would check the error counters with "show interface <interface>" and see if anything but "0" is shown on each interface.