topic Re: Its CCI or ACI interference? in Wireless

Its CCI or ACI interference?

eigrpy — Mon, 05 Jul 2021 20:09:52 GMT

Hi Please see the below picture. there are two ssid signals overlapping, which come from the same AP. Can we think it has ACI or CCI interference? Thank you

Re: Its CCI or ACI interference?

Scott Fella — Tue, 02 Feb 2021 17:24:57 GMT

Well, are you 100% sure its the same AP? Also check to see if your ap has a third radio known as a FRA. This can enable a micro radio per say on an existing access point(s) that is capable. Check the mac address on your tool or should I say BSSID and verify if the mac address are identical or not.

Re: Its CCI or ACI interference?

Scott Fella — Tue, 02 Feb 2021 17:25:47 GMT

Take a look at this link aslo: https://www.cisco.com/c/en/us/td/docs/wireless/access_point/mob_exp/810/user_guide/b_ME_User_Guide_810/specify_wireless_setgs.html#task_1DEE1213F0D142CD918D23DD04565CBC

Re: Its CCI or ACI interference?

eigrpy — Wed, 03 Feb 2021 01:31:10 GMT

Hi Scott,

Yes, it is coming from the same AP because the two signals disappear once the AP is powered off.

Re: Its CCI or ACI interference?

Scott Fella — Wed, 03 Feb 2021 03:01:53 GMT

So did you look at the link? Your ap has a second 5ghz radio or not?

Re: Its CCI or ACI interference?

patoberli — Thu, 04 Feb 2021 09:45:14 GMT

Based on your screenshot, those are two different BSSID. This is completely normal to show up like this. As it's the same AP and probably Radio (compare the MAC addresses of the BSSID, if the last character is +- 1 it's typically the same radio), you will not have CCI or ACI.

Re: Its CCI or ACI interference?

eigrpy — Thu, 04 Feb 2021 17:03:16 GMT

Thank you very much. I think you are right. Its two ssid from one AP. so under one WLC, if the two signals overlap and the signal come from different AP, we need to change one of channel number, right? for get rid of CCI or ACI?

Re: Its CCI or ACI interference?

Scott Fella — Thu, 04 Feb 2021 17:24:04 GMT

David,

As long as the controllers are part of the same rf group and mobility is configured, then one of the controllers would be the rf master and would know fo the rf environment. You should not have to make a static change or a temporary change with RRM.

Re: Its CCI or ACI interference?

eigrpy — Thu, 04 Feb 2021 18:10:43 GMT

we only have one controller there. question is under one WLC, if the two signals overlap and the signal come from different AP, we need to change one of channel number, right?

Re: Its CCI or ACI interference?

Scott Fella — Thu, 04 Feb 2021 19:38:04 GMT

Yes you do. RRM only works when there are three access points that can "hear" each other. If less than three, then manual changes are required.

Re: Its CCI or ACI interference?

eigrpy — Fri, 05 Feb 2021 23:22:21 GMT

After I checked it, it is two SSID from the same AP. can we configure it at the two different channels for the two SSID separately? Thank you

Re: Its CCI or ACI interference?

patoberli — Sat, 06 Feb 2021 00:20:53 GMT

No, but this is absolutely no problem. What you could do, define one bssid for the 2.4ghz radio and the other for the 5ghz one. I would not do this.

Re: Its CCI or ACI interference?

Scott Fella — Sat, 06 Feb 2021 17:06:53 GMT

You can always manually set the channels. RRM works well only if you have three aps that can hear each other. If you are testing and the two radios are on the same channel, manually change then to a channel that works best in your environment.