[j-nsp] strange packet loss without impact

[Adam Leff]

I realize this will sound silly, but have you checked for half-duplex
on your interfaces?

Those onboard J6350 interfaces are actually 10/100/1000, so if you
don't have the speed and link-mode hardcoded,  do a show interfaces
extensive ge-0/0/# and check the link partner section to ensure you're
running full-duplex.

Adam

On Jul 4, 2011, at 7:01, Matthias Brumm <matthias at brumm.net> wrote:

> Hello!
>
> Since some weeks now, we have a strange packet loss on one of our edge
> locations.
>
> A few days ago an IX informed us about packet loss on our router. The router
> in place is a J6350. We have a 1 Gig line to us and two 1 Gig lines to some
> uplinks. Every communication goes through a 1 Gig copper link to a ProCurve
> 2810-24G. So the external links are connected to the switch and the switch
> via one cable with the router.
>
> The packet loss is strange, because:
>
> 1. In smokeping during the busy hours of the day, there are losses of about
> 5%
> 2. From my workstation I get packet loss of about 10 up to 50%
> 3. There are no errors on the switch or router interface (except i.e. VLAN
> errors)
> 4. no customers have reported any problems. But there are many customers
> relying on real time communication (VoIP/RDP)
> 5. The switch port with the router is showing maximum 200 Mbit
> 6. The router is showing 20% real-time threads
>
> According to the datasheet the J-Series should be able to deliver this
> performance easily. Or are the onboard Gig-Interfaces the problem? Of course
> I know, that this physical configuration is a bad idea, and I will change is
> very soon to ease the load on this particular port.
>
> Any other ideas?
>
> Regards,
>
> Matthias
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