topic Re: Should I change 40Mhz DCCA to 80Mhz DCA? in Wireless

Should I change 40Mhz DCCA to 80Mhz DCA?

Andrew White — Mon, 05 Jul 2021 17:32:22 GMT

Hello,

Our clients don't get the full speed when on WiFi. When we check on the WLC most get a Connection Speed of 400 Mbps and a score of 50-66%.

When I go to go to wireless tab >> 802.11a/n/ac >> RRM >> DCA the Channel Width is set to 40Mhz. I remember about 2 years ago we had it set to 80Mhz, but from memory I think some users had issues roaming.

Should it be set to 80Mhz or is this too risky? I'm assuming all users will disconnect if I do this?

Thanks

Re: Should I change 40Mhz DCCA to 80Mhz DCA?

Sandeep Choudhary — Tue, 11 Jun 2019 05:37:05 GMT

Hi,

My comment on base don 8.5 software version:

In my opinion you really need to look at the channel utilization in your office. If it's high, then reduce he channel width. Best case is DCA set to "Best".

Info: Using 80 MHz channels consumes 4 x 20 MHz channels for each channel and can introduce unwanted interference in the infrastructure unless you have designed for this specifically.

Regards

Dont forget to rate helpful posts

Re: Should I change 40Mhz DCCA to 80Mhz DCA?

Andrew White — Tue, 11 Jun 2019 06:02:38 GMT

Ok thanks. We are on 8.5.x now.

Where is this best option? And channel utilisation?

Thanks

Re: Should I change 40Mhz DCCA to 80Mhz DCA?

Sandeep Choudhary — Tue, 11 Jun 2019 07:05:25 GMT

Check the attached pic:

Wireless > 802.11a/n/ac > RRM > DCA

Re: Should I change 40Mhz DCCA to 80Mhz DCA?

Leo Laohoo — Tue, 11 Jun 2019 07:22:28 GMT

I'd rather stick with 40 Mhz.
The issue with the client may have nothing to do with channel bonding.
What is the exact model of the wireless NIC of the client and what wireless NIC driver is being used?