Re-Connection issues with 802.11ac

RouterOS Wireless Networking
1

I expirienced a strange behaviour of connected wifi-clients on a RB922UAGS-5HPacD acting as AP:
Every time I connect a RB911G-5HPacD as a wifi-station-client to the AP, other clients (some, not all) loose their wifi connection and reconnect from then every 5-10s until I disable the (working) wifi connection from the RB911G-5HPacD.

Are my properties correct?

AP:

name="Wifi-AP" mtu=1500 mac-address=4C:5E:0C:60:EE:8B arp=enabled interface-type=Atheros AR9888 mode=ap-bridge ssid="Sample-WiFi" frequency=auto
      band=5ghz-a/n/ac channel-width=20/40mhz-Ce scan-list=default wireless-protocol=802.11 vlan-mode=no-tag vlan-id=1 wds-mode=disabled
      wds-default-bridge=none wds-ignore-ssid=no bridge-mode=enabled default-authentication=yes default-forwarding=yes default-ap-tx-limit=0
      default-client-tx-limit=0 hide-ssid=no security-profile=Sample-Sec compression=no

Client:

name="WiFi-client" mtu=1500 mac-address=4C:5E:0C:73:91:3A arp=enabled interface-type=Atheros AR9888 mode=station ssid="Sample-WiFi"
      frequency=auto band=5ghz-a/n/ac channel-width=20/40mhz-Ce scan-list=default wireless-protocol=any vlan-mode=no-tag vlan-id=1 wds-mode=disabled
      wds-default-bridge=none wds-ignore-ssid=no bridge-mode=enabled default-authentication=yes default-forwarding=yes default-ap-tx-limit=0
      default-client-tx-limit=0 hide-ssid=no security-profile=Sample-Sec compression=no
2

On the AP try use wireless protocol NV2 and if your clients are AC only, use band=5GHz-only-AC.
Note that if you use NV2 the security profile is not working and you need to use the NV2 security.

How are the signals? please provide registration table print.. maybe this AC one client runs too hot?

3

Ok I didn’t tried to use NV2 because in my opinion it makes the AP inaccessible for non-NV2-devices?! :open_mouth:
And no, they are mostly 802.11n-devices, but 802.11ac-clients are running too. “Only-AC” is no choice for me…

How are the signals? please provide registration table print.. maybe this AC one client runs too hot?


 0 ;;; AirPort
   WiFi-AP  00:24:36:AA:BB:CC no  -85dBm@6Mbps    60Mb... 1d21h24m38s
 1 ;;; iPod
   WiFi-AP 8C:2D:AA:AA:BB:CC no  -53dBm@6Mbps    135M... 1h37m28s
 2 ;;; MacBook
   WiFi-AP 00:23:12:AA:BB:CC no  -50dBm@6Mbps    300M... 58m10s
 3 ;;; iPhone6+
   WiFi-AP 9C:F3:87:AA:BB:CC no  -58dBm@6Mbps    200M... 38m13s

I don’t think it’s a load behavior because the AP is at 2-7% approx. and the AC-wifi-client isn’t transmitting anything (no bridge, only test-client).

4

Ah this is a home AP then, I thought you only connect mikrotik devices. You are right, no way to use NV2 in this scenario… Why is the airport such low on signal? Is it the Airport which loses the connection when you connect the 911?

What is the signal strength of the 911 when its connected? It has quite high txpower set by default.. Ideally you should have similar signals from all your clients, which is all fine apart the Airport

5

Ah this is a home AP then, I thought you only connect mikrotik devices. You are right, no way to use NV2 in this scenario… Why is the airport such low on signal? Is it the Airport which loses the connection when you connect the 911?

What is the signal strength of the 911 when its connected? It has quite high txpower set by default.. Ideally you should have similar signals from all your clients, which is all fine apart the Airport

The Airport is more fare away than the other devices, but never loose their connection. Connections which are affected are from iPhone (802.11ac) or Macbook (802.11n) and better than -70dB. It’s not a problem of signal strength or noise floor.

The txpower is limited by the country settings (that’s what Mikrotik support says). :slight_smile: