Channel Overlap

RouterOS Wireless Networking
1

hAP ac^3 7.13.3 / cAP ac 7.13 / CapsMAN country united states indoor installation

Control Channel Width set to 20Mhz for 2.4, however, NetSpot shows a Secondary Frequency at 40Mhz width. Subsequently, I am unable to reduce channel overlap. I have to assume I would get a slightly stronger signal 20Mhz and no overlap. Any ideas?

2

Can you please show related config ?
What does status tab show for that radio ?

Also, have you tried other scanning tools ? Do they tell you the same story ?

3

Thank you for the reply.

Wifiman does show a 40Mhz channel width as well. However, the built-in WiFi does set the channel width to 20Mhz.

/caps-man configuration
add country="united states" installation=indoor mode=ap name=hidden to protect the innocent
add country="united states" installation=indoor name=hidden to protect the innocent
add country="united states" installation=indoor mode=ap name=hidden to protect the innocent
add channel.band=2ghz-b country="united states" installation=indoor mode=ap name=hidden to protect the innocent
add country="united states" datapath.client-to-client-forwarding=yes .local-forwarding=yes installation=indoor mode=ap name=hidden to protect the innocent
add channel.band=2ghz-b country="united states" datapath.client-to-client-forwarding=yes .local-forwarding=yes installation=indoor mode=ap name=hidden to protect the innocent
add channel.band=5ghz-n/ac .control-channel-width=20mhz .extension-channel=XXXX country="united states" datapath.client-to-client-forwarding=yes .local-forwarding=yes name=cfg-5ghz-ac \
    security=hidden to protect the innocent=""
add channel.band=5ghz-onlyn .control-channel-width=20mhz .extension-channel=XX country="united states" datapath.client-to-client-forwarding=yes .local-forwarding=yes name=cfg-5ghz-an \
    security=hidden to protect the innocent=""
/caps-man interface
add configuration=hidden to protect the innocent disabled=no l2mtu=1600 mac-address=18:FD:74:ED:2E:36 master-interface=none name=hidden to protect the innocent radio-mac=18:FD:74:ED:2E:36 radio-name=18FD74ED2E36 security=\
    "hidden to protect the innocent"
add configuration=hidden to protect the innocent disabled=no l2mtu=1600 mac-address=18:FD:74:ED:2E:37 master-interface=none name=hidden to protect the innocent radio-mac=18:FD:74:ED:2E:37 radio-name=18FD74ED2E37 security=\
    "hidden to protect the innocent"
add configuration=hidden to protect the innocent disabled=no l2mtu=1600 mac-address=18:FD:74:ED:2E:3A master-interface=none name=hidden to protect the innocent radio-mac=18:FD:74:ED:2E:3A radio-name=18FD74ED2E3A security=\
    "hidden to protect the innocent"
add configuration=hidden to protect the innocent disabled=no l2mtu=1600 mac-address=18:FD:74:ED:2E:3B master-interface=none name=hidden to protect the innocent radio-mac=18:FD:74:ED:2E:3B radio-name=18FD74ED2E3B security=\
    "hidden to protect the innocent"

Status Tab
link downs 9
current state running-ap
current channel 2462/20-eC/gn(30dBm
current rate set OFDM:6-54 BW:1x-2x SGI:1x-2x HT:0-15
current basic set OFDM:6

4

Set extension-channel to disabled.

5

20-eC

Is indeed seen as 40MHz, just as XX or CE. XXXX as set with 5 GHz will be 80MHz and work as Ceee, eCee, eeCe or eeeC

Surprised one uses 802.11b in the US region. (expected a or g)
g/n default to 20MHz only, with n/ac devices, unless set otherwise
ax may be different and go for 40MHz by default in this 2.4GHz band.
I expected 20MHz/ax as default, as I have in standalone (no CAPsMAN) mode
AFAIK nothing was specified here.

6

Trying incremental changes to observe singles changes. Disabling Secondary Frequency first and will check tomorrow.

Thank you everyone for your input.

7

Success… setting extension channel to disable did the trick and I gained several decibels too.