[e-nsp] Packet loss/drop investigation

[Marcin Kuczera]

Youssef Ghorbal wrote:
> Hello,
> 
>  I'm currently investigating random audio loss on some Avaya phones
> attached to x460 stacks.
>  The phone reports packet loss when the audio is gone (which seems legit)
>  The audio loss always happens in one way (from "outside the building"
> to he IP phone) and lasts 10s

Is it 10s and than it is back, or after 10s of call you loose voice in 
one direction ?
This could be some SIP issue, that RTP is redirected somewhere or, 
firewall drops one way traffic because of some timeout (i.e. NAT problems).

Describe your case in more details.

Regards,
Marcin


> 
>  I need to know what kind of switch statistics/counters can be
> relevant to confirm or deny packet loss on the switch side.
> 
>  show ports rxerros / txerros / congestion / anomaly are all null
>  => does this mean that there is no packet loss on the stack ? and
> thus the packet loss is happening somewhere upstream ?
> 
>  Any advice would be really appreciated
> 
> Youssef Ghorbal
> _______________________________________________
> extreme-nsp mailing list
> extreme-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/extreme-nsp
>