10G switch drops traffic for a split second

Tue Nov 29 16:32:53 UTC 2016

Without more detail, I'm grasping at straws here, but see this recent
thread about QoS and microbursts on the juniper-nsp list:

https://puck.nether.net/pipermail/juniper-nsp/2016-November/033692.html

Do you have ports with different speeds connected?

Another idea: Are you using Spanning Tree Protocol and seeing lots of
TCNs?

On Tue, Nov 29, 2016 at 01:06:00AM -0800, TJ Trout wrote:
> I recently upgraded my core network from 1G to 10G and after the upgrade I
> have noticed that my 10G switch during peak traffic (1500mbps, 100,000pps)
> seems to be dropping traffic for a split second across all ports and all
> vlans. I immediately replaced the switch with a different brand/model and
> the problem persists.
> 
> Sometimes traffic drops to zero, others it drops to 50%, problem is very
> random but seems to occur with much more frequency during high PPS (pushing
> high traffic / iperf does not induce problem)
> 
> Could this be MTU? I've tried flow control, hard code duplex, stp on/off etc
> 
> I'm at a loss any ideas?
> 
> TJ Trout
> Volt Broadband