LAG sharing packet loss and high latency

[Jhonn_Bejar]

I have 2 swtiches X670G2-48x-4q, both are working correctly with a LAG (2 ports), version is EXOS 16.1.3.6-patch1-9

Switch1:

enable sharing 10 grouping 10,14 algorithm address-based custom lacp

Switch2:

enable sharing 2 grouping 2,15 algorithm address-based custom lacp

When i add a third and fourth link to the LAG in production, like this:

Switch1:

Configure sharing 10 add port 37,38

Switch2:

Configure sharing 2 add port 9,17

I can see packets losts and high latency.

What could be the issue?, should i disable the sharing, and enable it with the new ports?

[Alexandr_P]

Hello, all!

As Ram mentioned earlier, first of all you have to check microburst in your traffic.
Also reconfigure shared-packet-buffer on ports (because X670 has 10G ports and as higher the speed of the port, the more the microburst can be present on it).

Thank you!

[Alexander_Shik1]

We have exactly the same problem.
Was you lucky to find out the cause?

[Alexandr_P]

Hello, Alexander!

If you has this issue and has valid service contract on your switches, you can wright to your local distributor about that.


Thank you!

[Ram3]

I understand the port congestion is still seen. Please refer the below mentioned knowledge base article for your reference:
https://gtacknowledge.extremenetworks.com/articles/Solution/Prevent-packet-drops

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

https://gtacknowledge.extremenetworks.com/articles/How_To/How-to-verify-if-the-LACP-PDUs-are-receive...

Verify the above provided information and if this issue cannot be isolated. Could you please open a GTAC case to proceed further? So GTAC engineer can troubleshoot the congestion issue via remote session.