Show top overflow Cat 6513 ver 8.3

[ogencheva]

Does anyone know what overflow is mesured at in output of "show top" command in "overflow" column?

[smothuku · Accepted solution]

Hi ,

The Switch TopN Reports utility collects the following data for each physical port:

Port utilization (util)

Number of in/out bytes (bytes)

Number of in/out packets (pkts)

Number of in/out broadcast packets (bcst)

Number of in/out multicast packets (mcst)

Number of in errors (in-errors)

Number of buffer-overflow errors (buf-ovflw)

here overflow means buffer-overflow.

below link has sh top commands with explanation

http://www.cisco.com/univercd/cc/td/doc/product/lan/cat5000/rel_4_5/config/topn.htm#20889

Hope this helps you.

Thanks,

satish

[ogencheva]

Thanks, so do I undestand it correctly that it is a number of buffer overflow errors, but it does not give an amount of overflow in bits, bytes, packets, etc?

[smothuku]

Hi ,

Overflow means that the switch port buffers have filled up and the switch had to drop

these packets. This could be a sign that the port is running at an inferior speed and/or

duplex due to speed/duplex mis-match.

On a stable port we should not see overflow at all.

Thanks,

satish

[ogencheva]

Thank you for your response. This is a GIG port I am spanning whole VLAN into so speed and duplex mismatch will no apply. I was looking into that to determine how much data I do loose due to the buffer overflow. It seems that show top does not give that kind of information.