I was wondering if anyone has seen it in their deployments. I have a simple network at home with 2702i AP being connected to the 3560G switch. ESXi server where I have vWLC (8.5.*) is connected to the same switch directly.
What I observed is that I have slower network (throughput) when using FlexConnect local switching for my WLAN comparing to FlexConnect central switching. I would agree if that was opposite way. I have not run any intensive, detailed performance tests so I base that only on copying files from the file server VM which sits on the same ESXi server where vWLC is installed.
I sit quite close to the AP and Tx rate is 1300 Mbps. The reason why I prefer local switching is because I wanted to use Flex AVC and local switching must be enabled for that. It is quite fast so I do not complain, just wonder if anyone experienced that before.
Did you do this test multiple time to see it is similar in every time ? What exact version of 8.5.x you running ?
It's 8.5.135. Today I took screenshot transferring few times to confirm it's consistent and it was. Also, I observer that couple of weeks ago and it has been like that since when I turned on AVC (I mean before I was using central switching because I did not need AVC so the moment I wanted to have AVC I changed switching to local). Can the AVC downgrade the performance?. It doesn't hurt that much when browsing internet but I am trying to get the maximum throughput for transferring the files on the LAN between PCs and file servers where I would expect local switching to beat central.
Upgraded to 18.104.22.168 and it is the same. At this point I believe it is the AP and its CPU not being fast enough for Flex AVC.
During file transfer:
Disabling AVC improves the throughput and CPU utilization goes down a bit
Even with disabling AVC, did you notice lower throughput for FlexConnect local switching compare to central switching ?
Would you be able to share what values you got in your testing ? Pls try with different type of devices and see if all goes in same pattern
Disabling AVC improves the through for another 20-30% but it's far from reaching the value it gets with central switching. As with local switching more features are offloaded to AP I believe this is the reason for worse performance.
Thanks everyone for their input.