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SWTELTom
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Joined: Sun Nov 08, 2020 12:53 am

Disappearing SSID

Mon Nov 09, 2020 3:26 am

Hello,

We have recently deployed about 150 Hap AC2 (RBD52G-5HacD2HnD)

and we have several customers complaining about SSID that basically disappear.

and then come back. While the SSID's disappear WIFI Stops and 0 traffic gets passed. I have turned on WIFI Debug and have not seen anything being logged.

Here is the WIFI Config

/interface wireless
set [ find default-name=wlan1 ] band=2ghz-g/n disabled=no distance=indoors \
frequency=auto installation=indoor mode=ap-bridge ssid=2ghz \
wireless-protocol=802.11
set [ find default-name=wlan2 ] band=5ghz-onlyac channel-width=20/40/80mhz-XXXX \
default-forwarding=no disabled=no distance=indoors frequency=auto \
installation=indoor mode=ap-bridge ssid=5ghz wireless-protocol=802.11
/interface list
add comment=defconf name=WAN
add comment=defconf name=LAN
/interface wireless security-profiles
set [ find default=yes ] authentication-types=wpa2-psk mode=dynamic-keys \
supplicant-identity=MikroTik wpa-pre-shared-key=VVXXXXXX \
wpa2-pre-shared-key=VVXXXXXX
/ip hotspot profile
set [ find default=yes ] html-directory=flash/hotspot

Regards


Tom
 
SWTELTom
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Joined: Sun Nov 08, 2020 12:53 am

Re: Disappearing SSID

Mon Nov 09, 2020 4:16 am

Here is the export hide sensative.

[SWTEL@MikroTik-8D] > /export hide-sensitive
# nov/08/2020 17:27:08 by RouterOS 6.45.9
# software id = QUV0-PVGV
#
# model = RBD52G-5HacD2HnD
# serial number = C6140CF67307
/interface bridge
add admin-mac=48:8F:5A:D7:73:6B auto-mac=no comment=defconf name=bridge
/interface wireless
set [ find default-name=wlan1 ] band=2ghz-g/n disabled=no distance=indoors frequency=auto installation=indoor mode=ap-bridge ssid=8D-2ghz wireless-protocol=802.11
set [ find default-name=wlan2 ] band=5ghz-onlyac channel-width=20/40/80mhz-XXXX default-forwarding=no disabled=no distance=indoors frequency=auto installation=indoor mode=ap-bridge ssid=8D-5ghz \
wireless-protocol=802.11
/interface list
add comment=defconf name=WAN
add comment=defconf name=LAN
/interface wireless security-profiles
set [ find default=yes ] authentication-types=wpa2-psk mode=dynamic-keys supplicant-identity=MikroTik
/ip hotspot profile
set [ find default=yes ] html-directory=flash/hotspot
/ip pool
add name=default-dhcp ranges=192.168.88.10-192.168.88.254
add name=dhcp ranges=192.168.88.10-192.168.88.254
/ip dhcp-server
add address-pool=default-dhcp disabled=no interface=bridge 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=wlan1
add bridge=bridge comment=defconf interface=wlan2
/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
add address=192.168.88.1/24 comment=defconf interface=ether2 network=192.168.88.0
add address=38.94.228.118/27 interface=ether1 network=38.94.228.96
/ip dhcp-client
add comment=defconf dhcp-options=hostname,clientid interface=ether1
/ip dhcp-server network
add address=192.168.88.0/24 comment=defconf gateway=192.168.88.1
/ip dns
set allow-remote-requests=yes servers=66.28.0.45,66.28.0.61
/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=accept chain=input comment=WINBOX dst-port=8291 protocol=tcp
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
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
add action=masquerade chain=srcnat comment="defconf: masquerade" ipsec-policy=out,none out-interface-list=WAN
/ip route
add distance=1 gateway=38.94.228.97
/system clock
set time-zone-name=US/Pacific
/system identity
set name=MikroTik-8D
/system logging
add topics=wireless,debug
/tool bandwidth-server
set authenticate=no enabled=no
/tool graphing interface
add
/tool mac-server
set allowed-interface-list=LAN
/tool mac-server mac-winbox
set allowed-interface-list=LAN
 
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normis
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Posts: 26322
Joined: Fri May 28, 2004 11:04 am
Location: Riga, Latvia

Re: Disappearing SSID

Mon Nov 09, 2020 9:21 am

Could it be that 5GHz is scanning for radars? That takes a few minutes and the SSID disappears. This will be indicated in the interface list, while it happens.
 
SWTELTom
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Re: Disappearing SSID

Mon Nov 09, 2020 3:00 pm

Hello

We don’t see anything in the log. Saying searching for radar or anything.

It’s a default indoor usa3 WiFi config.

Ethernet wan and 5ghz and 2ghz set to auto on freq.

Thanks

Tom
 
SWTELTom
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Re: Disappearing SSID

Mon Nov 09, 2020 4:59 pm

Hello,

Someone suggest to upgrade to 6.47.6 / .7

Which we just did in a few devices to see if that is a fix.
As they had a large complex with the same issue and this seemed to fix it: *) wireless - fixed incorrect wireless capability information in association response frames;


What's new in 6.47.6 (2020-Oct-21 10:41):

*) cap - fixed L2MTU path discovery;
*) crs3xx - fixed hardware offloaded LACP bonding on Ethernet interfaces for CRS354 devices;
*) crs3xx - fixed switch rules for CRS309 and CRS317 devices (introduced in v6.47.3);
*) defconf - fixed default configuration loading on RBmAP-2nD;
*) dhcpv4-client - fixed DHCP offer packet parsing with overload option present;
*) dhcpv6-server - properly save bindings when executing "make-static" command;
*) fetch - improved SSL handshake processing;
*) ike1 - allow using "my-id" parameter with XAuth;
*) leds - fixed LED type setting;
*) lora - expose "joinEui" un "devEui" values in the log;
*) lte - fixed multiple APN passthrough on R11e-4G;
*) lte - improved EARFCN reporting in 3G and LTE modes on Sierra modems;
*) lte - limit allowed APN count to 3 on R11e-LTE;
*) mpls - fixed duplicate "LabelRelease" message sending;
*) ospf - optimized LSA printing for smaller message sizes;
*) radius - added "Service-Type" attribute to Access-Request for IPv4 and IPv6 DHCP servers;
*) smips - reduced RouterOS main package size;
*) switch - fixed Ethernet padding for small packets;
*) user - improved WinBox and The Dude authenticated session handling;
*) vrrp - made "password" parameter sensitive;
*) w60g - general stability and performance improvements;
*) wireless - added support for US FCC UNII-2 and Canada country profiles for NetMetal series devices;
*) wireless - fixed incorrect wireless capability information in association response frames;
 
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bpwl
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Posts: 2984
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Re: Disappearing SSID

Mon Nov 09, 2020 5:28 pm

channel-width=20/40/80mhz-XXXX frequency=auto
For me this is the lottery. No control at all. At least "installation=indoor" is limiting the possible outcome.
But still you get from channel 36-48 up to channel 52-64 as possible frequency selection (5 cases) , where every of the 8 channels could be the control channel. (20 different selections possible)

Consequence:
- if any of the channels 52 and up is in the selection, then the SSID will disappear for one minute (due to DFS) at startup or with any change to the interface settings.
-False radar detect will also make the SIID disappear for one minute.
-some client devices only support channel 36 till 48. If the control channel is in the 52 to 64 range they will not see the SSID.

EDIT: this cannot happen with "united states3" country selection, but I did not see that selected in the config file
 
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BartoszP
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Location: Poland

Re: Disappearing SSID

Mon Nov 09, 2020 6:20 pm

Just asking: do you deployed the US versions of hAPs?

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