Hey everyone,
We have a customer location running 8.3.0.5 AOS with a physical controller and Mobility Master. AP model 325.Most configuration was done following the roaming AC vrd guide. 4 SSIDs, reduced power for 2.4, removed lower connection speeds, etc.
The issue is that there are a few specifc devices that when active generate alot of retransmissions and cause channel utilization to go 90%+, usually creating a domino effect and taking other users with them. We were able to isolate a single PC which uses Realtek wireless (b/g only). Even after upgrading the device driver, the issue remains.
This was tested in an empty office, single device on the AP, download was going at 4 Mbs, drops to 700 kbps.
A site survey was performed (Ekahau) and there was no outside interference to justify this.
How can I find out what is causing the retransmissions? Should I wireshark at the controller? The retransmissions are only from AP to client, and not the other way around. Any ideas on what could be causing this?
Right now the action plan is to rollback to the conservative release...
Thanks!
RK