Transmit discard

[Mohd Khairul Nizam]

is this a bad sign or what ?

to many discard with no error ?

[omz]

Hi 

These are output queue drops. Output drops don't mean errors. You should be able to see these with 'show interface xx'. 

Output drops can be due to QoS or congestion. If there is not congestion, you may want to look at the QoS policy.

Hope this helps. 

Please mark helpful posts :)

[Leo Laohoo]

What switch is this?

[Mohd Khairul Nizam]

this is from Core SW to the access SW to every floor.

Core is 4500 chassis
Access is 2960-x

[Giuseppe Larosa]

Hello Mohd,

in order to understand the real impact of these transmit discards / output drops you need to use

show interface gix/y

and to compare

total output packets and output drops

if the ratio output drops / ( output drops + output packets)  is low less then 10^-4  you should be fine.

However, in case the ratio is high you need to look at your linecards types.

In the past I have seen some C4500 linecards where a group of GE ports is serviced by a single ASIC chip and the chip was a bottleneck for performance of adjacent ports.

This should not be your case as those were old type of linecards.

Hope to help

Giuseppe