[c-nsp] Input queue flushes and drops

[Clinton Work]

Is the VOIP traffic going thru this WAN router or do you have VWIC cards 
installed in the 3845 to terminate the VOIP sessions? I had a similar 
case opened last year and the TAC recommendation was to disable SPD.  
There is a hidden interface command "no spd enable" if you just want to 
disable SPD for one interface.  Disabling SDP will remove the input 
flushes counter and if you exceed the input queue they will show up 
under the input drop counter.   In my case, local terminated VOIP 
traffic and intensive IP SLA tests were causing input flushes.  I had to 
back off the IP SLA tests and order to prevent the input flushes.


On 2010-03-01 17:28, Javi wrote:
> I tried increasing the input queue (up to 2048) with no results, input
> flushes keep going up. Users still experiencing really bad VoIP performance
> in that WAN link...
>
> Rodney, I didn't turn off SPD as I'm not sure if that is going to break
> other stuff. This is a production head office main ISR router...
> Any ideas?
>