topic RE: Packet drop in ExtremeSwitching (EXOS/Switch Engine)

Packet drop

Alexandr_P — Fri, 28 Oct 2016 19:27:00 GMT

Hello, all!

Have below scheme:

When generate 3,2 Gbps AppMix traffic - all work fine.
When generate 2Gbps of HTTP traffic - all work fine.
When increase throughtput of HTTP traffic to 2,2Gbps - packets drops appear on LAG.

But ports utilization at that moment is not so big:

Packets is different and not so little:

HTTP is simple:
Client GET -> Server Request with 1024k page

Help please to investigate reason of drops.

Thank you!

RE: Packet drop

Bastian_Sprotte — Fri, 28 Oct 2016 19:37:00 GMT

can you check if flowcontrol somehow take action,
Bastian

RE: Packet drop

Alexandr_P — Fri, 28 Oct 2016 19:37:00 GMT

Hello, Bastian!

After:
# disable flow-control rx-pause ports all
# disable flow-control tx-pause ports all

There is no any drops:

Thank you!

RE: Packet drop

Necheporenko__N — Fri, 28 Oct 2016 19:42:00 GMT

Hello Alexandr,

Check streams for microbursts
https://gtacknowledge.extremenetworks.com/articles/Solution/There-is-only-60-usage-on-the-port-and-p...

https://gtacknowledge.extremenetworks.com/articles/How_To/How-to-identifying-microburst-congestion-w...

Best Regards,
Nikolay

RE: Packet drop

Alexandr_P — Fri, 28 Oct 2016 19:42:00 GMT

Hello, Nikolay!

Don't see any big splash.

Thank you!