Unstable/Unusable 2.4GHz network hAP ax2

Luk · September 10, 2023, 1:30pm

Hello,

the past few days I’ve been searching the web for a solution to my unstable 2.4GHz wifi. I used the Default configuration for my hAP ax2 and everything works except the 2,4GHz wifi. I see it pop up on my phone wifi search every now and then for a minute maybe but its unusable. I’ve played around with some settings (Different Bands, Channel width, Frequency, different security settings) but to no avail. Does anybody have a clue what might cause this unstability? since some of my devices in my Network rely on 2,4GHz.

Thanks

holvoetn · September 10, 2023, 1:46pm

Nobody has a crystal ball…

Export config, post between code quotes after removing serial number and public wan ip.

Luk · September 10, 2023, 2:26pm

Thanks for replying. I’m really new to this so I hope I do this right. This is what I think you mean with config?

# 2023-09-10 16:20:07 by RouterOS 7.11.2
# software id = YH9F-C24M
#
# model = C52iG-5HaxD2HaxD
# serial number = ###########
/interface bridge
add admin-mac=48:A9:8A:95:D2:E1 auto-mac=no comment=defconf name=bridge
/interface wifiwave2
set [ find default-name=wifi1 ] channel.band=5ghz-ax .skip-dfs-channels=\
    10min-cac .width=20/40/80mhz configuration.country=Germany .mode=ap \
    .ssid=MikroTik-95D2E5 disabled=no security.authentication-types=\
    wpa2-psk,wpa3-psk
set [ find default-name=wifi2 ] channel.band=2ghz-ax .frequency=2426-2448 \
    .skip-dfs-channels=10min-cac .width=20mhz configuration.antenna-gain=3 \
    .country=Germany .mode=ap .ssid=MikroTik-95D2E6 .tx-power=0 disabled=no \
    security.authentication-types=wpa2-psk .encryption=""
/interface list
add comment=defconf name=WAN
add comment=defconf name=LAN
/ip pool
add name=default-dhcp ranges=192.168.88.10-192.168.88.254
/ip dhcp-server
add address-pool=default-dhcp interface=bridge lease-time=10m name=defconf
/interface bridge port
add bridge=bridge comment=defconf interface=ether2
add bridge=bridge comment=defconf interface=ether3
add bridge=bridge comment=defconf interface=ether4
add bridge=bridge comment=defconf interface=ether5
add bridge=bridge comment=defconf interface=wifi1
add bridge=bridge comment=defconf interface=wifi2
/ip neighbor discovery-settings
set discover-interface-list=LAN
/interface list member
add comment=defconf interface=bridge list=LAN
add comment=defconf interface=ether1 list=WAN
/ip address
add address=192.168.88.1/24 comment=defconf interface=bridge network=\
    192.168.88.0
/ip dhcp-client
add comment=defconf interface=ether1
/ip dhcp-server network
add address=192.168.88.0/24 comment=defconf dns-server=192.168.88.1 gateway=\
    192.168.88.1
/ip dns
set allow-remote-requests=yes
/ip dns static
add address=192.168.88.1 comment=defconf name=router.lan
/ip firewall filter
add action=accept chain=input comment=\
    "defconf: accept established,related,untracked" connection-state=\
    established,related,untracked
add action=drop chain=input comment="defconf: drop invalid" connection-state=\
    invalid
add action=accept chain=input comment="defconf: accept ICMP" protocol=icmp
add action=accept chain=input comment=\
    "defconf: accept to local loopback (for CAPsMAN)" dst-address=127.0.0.1
add action=drop chain=input comment="defconf: drop all not coming from LAN" \
    in-interface-list=!LAN
add action=accept chain=forward comment="defconf: accept in ipsec policy" \
    ipsec-policy=in,ipsec
add action=accept chain=forward comment="defconf: accept out ipsec policy" \
    ipsec-policy=out,ipsec
add action=fasttrack-connection chain=forward comment="defconf: fasttrack" \
    connection-state=established,related hw-offload=yes
add action=accept chain=forward comment=\
    "defconf: accept established,related, untracked" connection-state=\
    established,related,untracked
add action=drop chain=forward comment="defconf: drop invalid" \
    connection-state=invalid
add action=drop chain=forward comment=\
    "defconf: drop all from WAN not DSTNATed" connection-nat-state=!dstnat \
    connection-state=new in-interface-list=WAN
/ip firewall nat
add action=masquerade chain=srcnat comment="defconf: masquerade" \
    ipsec-policy=out,none out-interface-list=WAN
/ipv6 firewall address-list
add address=::/128 comment="defconf: unspecified address" list=bad_ipv6
add address=::1/128 comment="defconf: lo" list=bad_ipv6
add address=fec0::/10 comment="defconf: site-local" list=bad_ipv6
add address=::ffff:0.0.0.0/96 comment="defconf: ipv4-mapped" list=bad_ipv6
add address=::/96 comment="defconf: ipv4 compat" list=bad_ipv6
add address=100::/64 comment="defconf: discard only " list=bad_ipv6
add address=2001:db8::/32 comment="defconf: documentation" list=bad_ipv6
add address=2001:10::/28 comment="defconf: ORCHID" list=bad_ipv6
add address=3ffe::/16 comment="defconf: 6bone" list=bad_ipv6
/ipv6 firewall filter
add action=accept chain=input comment=\
    "defconf: accept established,related,untracked" connection-state=\
    established,related,untracked
add action=drop chain=input comment="defconf: drop invalid" connection-state=\
    invalid
add action=accept chain=input comment="defconf: accept ICMPv6" protocol=\
    icmpv6
add action=accept chain=input comment="defconf: accept UDP traceroute" port=\
    33434-33534 protocol=udp
add action=accept chain=input comment=\
    "defconf: accept DHCPv6-Client prefix delegation." dst-port=546 protocol=\
    udp src-address=fe80::/10
add action=accept chain=input comment="defconf: accept IKE" dst-port=500,4500 \
    protocol=udp
add action=accept chain=input comment="defconf: accept ipsec AH" protocol=\
    ipsec-ah
add action=accept chain=input comment="defconf: accept ipsec ESP" protocol=\
    ipsec-esp
add action=accept chain=input comment=\
    "defconf: accept all that matches ipsec policy" ipsec-policy=in,ipsec
add action=drop chain=input comment=\
    "defconf: drop everything else not coming from LAN" in-interface-list=\
    !LAN
add action=accept chain=forward comment=\
    "defconf: accept established,related,untracked" connection-state=\
    established,related,untracked
add action=drop chain=forward comment="defconf: drop invalid" \
    connection-state=invalid
add action=drop chain=forward comment=\
    "defconf: drop packets with bad src ipv6" src-address-list=bad_ipv6
add action=drop chain=forward comment=\
    "defconf: drop packets with bad dst ipv6" dst-address-list=bad_ipv6
add action=drop chain=forward comment="defconf: rfc4890 drop hop-limit=1" \
    hop-limit=equal:1 protocol=icmpv6
add action=accept chain=forward comment="defconf: accept ICMPv6" protocol=\
    icmpv6
add action=accept chain=forward comment="defconf: accept HIP" protocol=139
add action=accept chain=forward comment="defconf: accept IKE" dst-port=\
    500,4500 protocol=udp
add action=accept chain=forward comment="defconf: accept ipsec AH" protocol=\
    ipsec-ah
add action=accept chain=forward comment="defconf: accept ipsec ESP" protocol=\
    ipsec-esp
add action=accept chain=forward comment=\
    "defconf: accept all that matches ipsec policy" ipsec-policy=in,ipsec
add action=drop chain=forward comment=\
    "defconf: drop everything else not coming from LAN" in-interface-list=\
    !LAN
/system clock
set time-zone-name=Europe/Berlin
/system note
set show-at-login=no
/tool mac-server
set allowed-interface-list=LAN
/tool mac-server mac-winbox
set allowed-interface-list=LAN

holvoetn · September 10, 2023, 2:58pm

Did you use Winbox for the config ?

On 2GHz interface, check if tab security section encryption is folded in.
Not empty and folded out.

Where does this come from ? Why is this set ?
configuration.antenna-gain=3
and
.tx-power=0

Side-comment:
I prefer to set frequency as much as possible manual. Otherwise you never know what will be selected.
On 2GHz channel it is recommended to use the 1/6/11 scheme (2412, 2437, 2462). Nothing else.
If you get on a channel in between, you will get interference from 2 other channels.

Luk · September 10, 2023, 3:16pm

yes I used WinBox, I probably folded it open while looking for options for testing. The gain setting I found on the First Time Configuration guide, the tx-power I don’t really know why it is there. If I did it right with the frequencies like this then it sadly is still unstable…

/interface bridge
add admin-mac=48:A9:8A:95:D2:E1 auto-mac=no comment=defconf name=bridge
/interface wifiwave2
set [ find default-name=wifi1 ] channel.band=5ghz-ax .skip-dfs-channels=\
    10min-cac .width=20/40/80mhz configuration.country=Germany .mode=ap \
    .ssid=MikroTik-95D2E5 disabled=no security.authentication-types=\
    wpa2-psk,wpa3-psk
set [ find default-name=wifi2 ] channel.band=2ghz-ax .frequency=2412 \
    .secondary-frequency=2437,2462 .skip-dfs-channels=10min-cac .width=20mhz \
    configuration.country=Germany .mode=ap .ssid=MikroTik-95D2E6 disabled=no \
    security.authentication-types=wpa2-psk

holvoetn · September 10, 2023, 3:18pm

Remove secondary frequency, that’s not the intention to set it there.
Stick to 1 fixed channel first to see if we can get it stable.
Also remove skip dfs on 2ghz interface.

Luk · September 10, 2023, 3:27pm

I think I’ve got it stable after I did two things. First remove DFS and secondly, moved the router further away from a grounded heating element into the middle of my room for this test. Seems like one of those things fixed it.

Edit: The heating element is not on, and the router was not intended to stay there for an extended period of time (especially when I gonna start using the heater again)…just felt like I had to mention this.