[cisco-voip] Voice Gateway Input Queue Flushes

[Wes Sisk]

Not an answer but a bit more information -

"Flushes are normally caused on the input hold queue if the packet stays 
in the queue for a longer duration and if a CPU time slot is not 
available to switch the packet to the egress interface . This kind of 
problem is normally caused if the packets are process switched on the 
router. This kind of problem is sometimes accompanies with buffer 
failures and some times high cpu."

I found one other reference to possible low priority packets dropped 
during congestion.

/Wes

On Wednesday, June 03, 2009 11:41:35 AM, Carter, Bill 
<bcarter at sentinel.com> wrote:
>
> I am not sure why, but I am getting a lot of Input Queue flushes on my 
> LAN interface. This is a voice gateway using a single interface for IP 
> traffic.
>
>  
>
> Model: 3845
>
> IOS: 124-22.T1
>
>  
>
>  
>
> GigabitEthernet0/0 is up, line protocol is up
>
>      reliability 255/255, txload 3/255, rxload 5/255
>
>   output flow-control is XON, input flow-control is XON
>
>   Last input 00:00:00, output 00:00:00, output hang never
>
>   Last clearing of "show interface" counters 1d21h
>
>   *Input queue: 0/300/0/76159 (size/max/drops/flushes); Total output 
> drops: 0*
>
>   Queueing strategy: weighted fair
>
>   Output queue: 0/1000/64/0 (size/max total/threshold/drops)
>
>      Conversations  0/2/256 (active/max active/max total)
>
>      Reserved Conversations 0/0 (allocated/max allocated)
>
>      Available Bandwidth 75000 kilobits/sec
>
>  
>
> GigabitEthernet0/0 is up, line protocol is up
>
>   ....
>
>   Multicast reserved groups joined: 224.0.0.1 224.0.0.2 224.0.0.22 
> 224.0.0.13
>
>   Outgoing access list is not set
>
>   Inbound  access list is not set
>
>   Proxy ARP is enabled
>
>   Local Proxy ARP is disabled
>
>   Security level is default
>
>   Split horizon is enabled
>
>   ICMP redirects are always sent
>
>   ICMP unreachables are always sent
>
>   ICMP mask replies are never sent
>
>   IP fast switching is enabled
>
>   IP fast switching on the same interface is enabled
>
>   IP Flow switching is disabled
>
>   IP CEF switching is enabled
>
>   IP CEF switching turbo vector
>
>   IP multicast fast switching is enabled
>
>   IP multicast distributed fast switching is disabled
>
>   IP route-cache flags are Fast, CEF
>
>   Router Discovery is disabled
>
>  
>
>  
>
>  
>
> ------------------------------------------------------------------------
>
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