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LAG sharing packet loss and high latency

LAG sharing packet loss and high latency

Jhonn_Bejar
New Contributor
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?

13 REPLIES 13

Alexandr_P
Valued Contributor
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
New Contributor
We have exactly the same problem.
Was you lucky to find out the cause?

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
Extreme Employee
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.
GTM-P2G8KFN