High ping times + many dropped sessions

[jschaffin]

I've got an odd situation developing at a customer site. The logical setup is two fixed LS2s running as stations, and one fixed LS2 running as an access point through a switch to a server. All are running the latest firmware level: XS2.ar2316.v3.4.4390.090521.1757.

The physical setup is
- both STATION LS2s have clear LOS and are about 100 meters from the AP
- both STATION LS2s have a 4dbi flat patch antenna
- the AP LS2 has a 14dbi flat patch antenna
- the angle between the AP and the two receivers is right at 60 degrees.

It is a very noisy environment, next to a residential area, with light industrial, so there are a lot of unmanaged wireless networks that show up in the site survey.

I have selected channel 11 for this configuration, as it seems the most lightly used in the environments.

RSSIs for both stations are -45 to -48dbm.

There is no security at this time, but I want to change that when we figure out the cause of the problems we're having. Those are:

a) very long ping times to the stations from the server: these range anywhere from 150ms to 1500ms.
b) lots of dropped connections and lost data from long-lived sessions with high throughput requirements.

I've been reading this paper linked in another thread:
http://www.ubnt.com/downloads/ubi_mtik_power.pdf

Based on that, I'm guessing, and it's purely a guess, that I need to lower my power output in all of the LS2s to something like 18-20dbm to achieve the required throughput. The frustrating thing is that I've got the data rate set to AUTO, which I understand is supposed to lower the output power automagically based on link conditions.

I'm also pondering an antenna swap at the AP to achieve a larger coverage profile, but I really don't think that's it, given the RSSIs at the stations. But I could be wrong, as usual.

I'm going to try the power reduction tomorrow on Monday and see if it improves the conditions. But I'd really love to hear any other ideas that might help, because I'm not going to get paid until this works to their satisfaction.

[jschaffin]

Configuration files, if needed - I've cleansed it of customer data before copying it into here:

Station @ 10.0.0.16:
aaa.1.status=disabled
aaa.1.wpa.key.1.mgmt=WPA-PSK
aaa.1.wpa.psk=password
aaa.status=disabled
bridge.1.devname=br0
bridge.1.fd=1
bridge.1.port.1.devname=eth0
bridge.1.port.1.status=enabled
bridge.1.port.2.devname=ath0
bridge.1.port.2.status=enabled
bridge.1.stp.status=disabled
bridge.status=enabled
dhcpc.1.devname=br0
dhcpc.1.status=disabled
dhcpc.status=disabled
dhcpd.1.status=disabled
dhcpd.status=disabled
dnsmasq.1.devname=eth0
dnsmasq.1.status=enabled
dnsmasq.status=disabled
ebtables.1.cmd=-t nat -A PREROUTING --in-interface ath0 -j arpnat --arpnat-target ACCEPT
ebtables.1.status=enabled
ebtables.2.cmd=-t nat -A POSTROUTING --out-interface ath0 -j arpnat --arpnat-target ACCEPT
ebtables.2.status=enabled
ebtables.3.cmd=-t broute -A BROUTING --protocol 0x888e --in-interface ath0 -j DROP
ebtables.3.status=disabled
ebtables.50.status=disabled
ebtables.51.status=disabled
ebtables.52.status=disabled
ebtables.status=enabled
httpd.port.http=80
httpd.status=enabled
igmpproxy.status=disabled
iptables.3.status=disabled
iptables.status=disabled
ls_logo.status=enabled
ls_logo.url=http://
netconf.1.alias.1.status=disabled
netconf.1.alias.2.status=disabled
netconf.1.alias.3.status=disabled
netconf.1.alias.4.status=disabled
netconf.1.alias.5.status=disabled
netconf.1.alias.6.status=disabled
netconf.1.alias.7.status=disabled
netconf.1.alias.8.status=disabled
netconf.1.devname=eth0
netconf.1.ip=0.0.0.0
netconf.1.netmask=255.255.255.0
netconf.1.promisc=enabled
netconf.1.status=enabled
netconf.1.up=enabled
netconf.2.alias.1.status=disabled
netconf.2.alias.2.status=disabled
netconf.2.alias.3.status=disabled
netconf.2.alias.4.status=disabled
netconf.2.alias.5.status=disabled
netconf.2.alias.6.status=disabled
netconf.2.alias.7.status=disabled
netconf.2.alias.8.status=disabled
netconf.2.allmulti=disabled
netconf.2.devname=ath0
netconf.2.ip=0.0.0.0
netconf.2.netmask=255.255.255.0
netconf.2.status=enabled
netconf.2.up=enabled
netconf.3.autoip.status=enabled
netconf.3.devname=br0
netconf.3.ip=10.0.0.16
netconf.3.netmask=255.255.255.0
netconf.3.status=enabled
netconf.3.up=enabled
netconf.status=enabled
netmode=bridge
ppp.1.password=
ppp.1.status=disabled
ppp.status=disabled
radio.1.ack.auto=disabled
radio.1.ackdistance=4050
radio.1.acktimeout=48
radio.1.chanshift=0
radio.1.clksel=0
radio.1.countrycode=840
radio.1.devname=ath0
radio.1.dfs.status=
radio.1.frag=off
radio.1.ieee_mode=pureg
radio.1.mcastrate=6M
radio.1.mode=managed
radio.1.rate.auto=enabled
radio.1.rate.max=54M
radio.1.rts=off
radio.1.rx_antenna=1
radio.1.rx_antenna_diversity=disabled
radio.1.status=enabled
radio.1.thresh62a=28
radio.1.thresh62b=28
radio.1.thresh62g=28
radio.1.tx_antenna=1
radio.1.tx_antenna_diversity=disabled
radio.1.txpower=16
radio.countrycode=840
radio.ratemodule=ath_rate_sample
radio.status=enabled
resolv.host.1.name=ubnt
resolv.host.1.status=enabled
resolv.nameserver.1.ip=10.0.0.253
resolv.nameserver.1.status=enabled
resolv.nameserver.2.ip=
resolv.nameserver.2.status=disabled
resolv.status=enabled
route.1.devname=br0
route.1.gateway=10.0.0.254
route.1.ip=0.0.0.0
route.1.netmask=0
route.1.status=enabled
route.status=enabled
snmp.community=public
snmp.contact=nobody@email.com
snmp.location=home
snmp.status=enabled
syslog.remote.status=
syslog.status=enabled
tshaper.status=disabled
users.1.name=ubnt
users.1.password=
users.1.status=enabled
users.status=enabled
wireless.1.addmtikie=enabled
wireless.1.ap=
wireless.1.authmode=1
wireless.1.compression=disabled
wireless.1.devname=ath0
wireless.1.fastframes=enabled
wireless.1.frameburst=enabled
wireless.1.hide_ssid=disabled
wireless.1.l2_isolation=enabled
wireless.1.macclone=disabled
wireless.1.rssi_led1=1
wireless.1.rssi_led2=15
wireless.1.rssi_led3=22
wireless.1.rssi_led4=30
wireless.1.scan_list.status=disabled
wireless.1.security=none
wireless.1.signal_led1=94
wireless.1.signal_led2=80
wireless.1.signal_led3=73
wireless.1.signal_led4=65
wireless.1.sper=disabled
wireless.1.ssid=ubntap
wireless.1.status=enabled
wireless.1.wds=disabled
wireless.1.wmm=enabled
wireless.1.wmmlevel=4
wireless.status=enabled
wpasupplicant.device.1.devname=ath0
wpasupplicant.device.1.driver=madwifi
wpasupplicant.device.1.profile=WPA-PSK
wpasupplicant.device.1.status=disabled
wpasupplicant.profile.1.name=WPA-PSK
wpasupplicant.profile.1.network.1.bssid=
wpasupplicant.profile.1.network.1.eap.1.status=disabled
wpasupplicant.profile.1.network.1.key_mgmt.1.name=WPA-PSK
wpasupplicant.profile.1.network.1.pairwise.1.name=TKIP CCMP
wpasupplicant.profile.1.network.1.proto.1.name=RSN
wpasupplicant.profile.1.network.1.psk=
wpasupplicant.profile.1.network.1.ssid=ubntap
wpasupplicant.status=disabled


Station @ 10.0.0.15:
aaa.1.status=disabled
aaa.1.wpa.key.1.mgmt=WPA-PSK
aaa.1.wpa.psk=password
aaa.status=disabled
bridge.1.devname=br0
bridge.1.fd=1
bridge.1.port.1.devname=eth0
bridge.1.port.1.status=enabled
bridge.1.port.2.devname=ath0
bridge.1.port.2.status=enabled
bridge.1.stp.status=disabled
bridge.status=enabled
dhcpc.1.devname=br0
dhcpc.1.status=disabled
dhcpc.status=disabled
dhcpd.1.status=disabled
dhcpd.status=disabled
dnsmasq.1.devname=eth0
dnsmasq.1.status=enabled
dnsmasq.status=disabled
ebtables.1.cmd=-t nat -A PREROUTING --in-interface ath0 -j arpnat --arpnat-target ACCEPT
ebtables.1.status=enabled
ebtables.2.cmd=-t nat -A POSTROUTING --out-interface ath0 -j arpnat --arpnat-target ACCEPT
ebtables.2.status=enabled
ebtables.3.cmd=-t broute -A BROUTING --protocol 0x888e --in-interface ath0 -j DROP
ebtables.3.status=disabled
ebtables.50.status=disabled
ebtables.51.status=disabled
ebtables.52.status=disabled
ebtables.status=enabled
httpd.port.http=80
httpd.status=enabled
igmpproxy.status=disabled
iptables.3.status=disabled
iptables.status=disabled
ls_logo.status=enabled
ls_logo.url=http://
netconf.1.alias.1.status=disabled
netconf.1.alias.2.status=disabled
netconf.1.alias.3.status=disabled
netconf.1.alias.4.status=disabled
netconf.1.alias.5.status=disabled
netconf.1.alias.6.status=disabled
netconf.1.alias.7.status=disabled
netconf.1.alias.8.status=disabled
netconf.1.devname=eth0
netconf.1.ip=0.0.0.0
netconf.1.netmask=255.255.255.0
netconf.1.promisc=enabled
netconf.1.status=enabled
netconf.1.up=enabled
netconf.2.alias.1.status=disabled
netconf.2.alias.2.status=disabled
netconf.2.alias.3.status=disabled
netconf.2.alias.4.status=disabled
netconf.2.alias.5.status=disabled
netconf.2.alias.6.status=disabled
netconf.2.alias.7.status=disabled
netconf.2.alias.8.status=disabled
netconf.2.allmulti=disabled
netconf.2.devname=ath0
netconf.2.ip=0.0.0.0
netconf.2.netmask=255.255.255.0
netconf.2.status=enabled
netconf.2.up=enabled
netconf.3.autoip.status=disabled
netconf.3.devname=br0
netconf.3.ip=10.0.0.15
netconf.3.netmask=255.255.255.0
netconf.3.status=enabled
netconf.3.up=enabled
netconf.status=enabled
netmode=bridge
ppp.1.password=
ppp.1.status=disabled
ppp.status=disabled
radio.1.ack.auto=disabled
radio.1.ackdistance=4050
radio.1.acktimeout=48
radio.1.chanshift=0
radio.1.clksel=0
radio.1.countrycode=840
radio.1.devname=ath0
radio.1.dfs.status=
radio.1.frag=off
radio.1.ieee_mode=g
radio.1.mcastrate=1M
radio.1.mode=managed
radio.1.rate.auto=enabled
radio.1.rate.max=54M
radio.1.rts=off
radio.1.rx_antenna=1
radio.1.rx_antenna_diversity=disabled
radio.1.status=enabled
radio.1.thresh62a=28
radio.1.thresh62b=28
radio.1.thresh62g=28
radio.1.tx_antenna=1
radio.1.tx_antenna_diversity=disabled
radio.1.txpower=16
radio.countrycode=840
radio.ratemodule=ath_rate_sample
radio.status=enabled
resolv.host.1.name=ubnt
resolv.host.1.status=enabled
resolv.nameserver.1.ip=10.0.0.253
resolv.nameserver.1.status=enabled
resolv.nameserver.2.ip=
resolv.nameserver.2.status=disabled
resolv.status=enabled
route.1.devname=br0
route.1.gateway=10.0.0.254
route.1.ip=0.0.0.0
route.1.netmask=0
route.1.status=enabled
route.status=enabled
snmp.community=public
snmp.contact=nobody@email.com
snmp.location=home
snmp.status=enabled
syslog.remote.status=
syslog.status=enabled
tshaper.status=disabled
users.1.name=ubnt
users.1.password=
users.1.status=enabled
users.status=enabled
wireless.1.addmtikie=enabled
wireless.1.ap=
wireless.1.authmode=1
wireless.1.compression=disabled
wireless.1.devname=ath0
wireless.1.fastframes=enabled
wireless.1.frameburst=enabled
wireless.1.hide_ssid=disabled
wireless.1.l2_isolation=enabled
wireless.1.macclone=disabled
wireless.1.rssi_led1=1
wireless.1.rssi_led2=15
wireless.1.rssi_led3=22
wireless.1.rssi_led4=30
wireless.1.scan_list.status=disabled
wireless.1.security=none
wireless.1.signal_led1=94
wireless.1.signal_led2=80
wireless.1.signal_led3=73
wireless.1.signal_led4=65
wireless.1.sper=disabled
wireless.1.ssid=ubntap
wireless.1.status=enabled
wireless.1.wds=disabled
wireless.1.wmm=enabled
wireless.1.wmmlevel=4
wireless.status=enabled
wpasupplicant.device.1.devname=ath0
wpasupplicant.device.1.driver=madwifi
wpasupplicant.device.1.profile=WPA-PSK
wpasupplicant.device.1.status=disabled
wpasupplicant.profile.1.name=WPA-PSK
wpasupplicant.profile.1.network.1.bssid=
wpasupplicant.profile.1.network.1.key_mgmt.1.name=WPA-PSK
wpasupplicant.profile.1.network.1.pairwise.1.name=TKIP CCMP
wpasupplicant.profile.1.network.1.proto.1.name=RSN
wpasupplicant.profile.1.network.1.psk=
wpasupplicant.profile.1.network.1.ssid=ubntap
wpasupplicant.status=disabled

Access point @ 10.0.0.10:
aaa.1.br.devname=br0
aaa.1.devname=ath0
aaa.1.driver=madwifi
aaa.1.ssid=ubntap
aaa.1.status=disabled
aaa.1.wpa.1.pairwise=TKIP CCMP
aaa.1.wpa.key.1.mgmt=WPA-PSK
aaa.1.wpa.psk=
aaa.1.wpa=2
aaa.status=disabled
bridge.1.devname=br0
bridge.1.fd=1
bridge.1.port.1.devname=eth0
bridge.1.port.1.status=enabled
bridge.1.port.2.devname=ath0
bridge.1.port.2.status=enabled
bridge.1.stp.status=disabled
bridge.status=enabled
dhcpc.1.devname=br0
dhcpc.1.status=disabled
dhcpc.status=disabled
dhcpd.1.status=disabled
dhcpd.status=disabled
dnsmasq.1.devname=eth0
dnsmasq.1.status=enabled
dnsmasq.status=disabled
ebtables.1.cmd=-t nat -A PREROUTING --in-interface ath0 -j arpnat --arpnat-target ACCEPT
ebtables.1.status=disabled
ebtables.2.cmd=-t nat -A POSTROUTING --out-interface ath0 -j arpnat --arpnat-target ACCEPT
ebtables.2.status=disabled
ebtables.3.cmd=-t broute -A BROUTING --protocol 0x888e --in-interface ath0 -j DROP
ebtables.3.status=disabled
ebtables.50.status=disabled
ebtables.51.status=disabled
ebtables.52.status=disabled
ebtables.rule.1.chain=PREROUTING
ebtables.rule.1.in=ath0
ebtables.rule.1.t.arpnat_target=ACCEPT
ebtables.rule.1.table=nat
ebtables.rule.1.target=arpnat
ebtables.rule.2.chain=POSTROUTING
ebtables.rule.2.out=ath0
ebtables.rule.2.t.arpnat_target=ACCEPT
ebtables.rule.2.table=nat
ebtables.rule.2.target=arpnat
ebtables.rule.3.chain=BROUTING
ebtables.rule.3.in=ath0
ebtables.rule.3.protocol=0x888e
ebtables.rule.3.table=broute
ebtables.rule.3.target=DROP
ebtables.status=enabled
httpd.port.http=80
httpd.status=enabled
igmpproxy.status=disabled
iptables.1.status=disabled
iptables.3.status=disabled
iptables.status=disabled
ls_logo.status=enabled
ls_logo.url=http://
netconf.1.alias.1.status=disabled
netconf.1.alias.2.status=disabled
netconf.1.alias.3.status=disabled
netconf.1.alias.4.status=disabled
netconf.1.alias.5.status=disabled
netconf.1.alias.6.status=disabled
netconf.1.alias.7.status=disabled
netconf.1.alias.8.status=disabled
netconf.1.devname=eth0
netconf.1.ip=0.0.0.0
netconf.1.netmask=255.255.255.0
netconf.1.promisc=enabled
netconf.1.status=enabled
netconf.1.up=enabled
netconf.2.alias.1.status=disabled
netconf.2.alias.2.status=disabled
netconf.2.alias.3.status=disabled
netconf.2.alias.4.status=disabled
netconf.2.alias.5.status=disabled
netconf.2.alias.6.status=disabled
netconf.2.alias.7.status=disabled
netconf.2.alias.8.status=disabled
netconf.2.allmulti=disabled
netconf.2.devname=ath0
netconf.2.ip=0.0.0.0
netconf.2.netmask=255.255.255.0
netconf.2.status=enabled
netconf.2.up=enabled
netconf.3.autoip.status=enabled
netconf.3.devname=br0
netconf.3.ip=10.0.0.10
netconf.3.netmask=255.255.255.0
netconf.3.status=enabled
netconf.3.up=enabled
netconf.status=enabled
netmode=bridge
ppp.1.password=
ppp.1.status=disabled
ppp.status=disabled
radio.1.ack.auto=disabled
radio.1.ackdistance=4050
radio.1.acktimeout=48
radio.1.channel=11
radio.1.chanshift=0
radio.1.clksel=0
radio.1.countrycode=840
radio.1.devname=ath0
radio.1.dfs.status=
radio.1.frag=off
radio.1.ieee_mode=pureg
radio.1.mcastrate=1M
radio.1.mode=master
radio.1.rate.auto=enabled
radio.1.rate.max=54M
radio.1.rts=off
radio.1.rx_antenna=1
radio.1.rx_antenna_diversity=disabled
radio.1.status=enabled
radio.1.thresh62a=28
radio.1.thresh62b=28
radio.1.thresh62g=28
radio.1.tx_antenna=1
radio.1.tx_antenna_diversity=disabled
radio.1.txpower=16
radio.countrycode=840
radio.ratemodule=ath_rate_sample
radio.status=enabled
resolv.host.1.name=ubnt
resolv.host.1.status=enabled
resolv.nameserver.1.ip=10.0.0.250
resolv.nameserver.1.status=enabled
resolv.nameserver.2.status=disabled
resolv.status=enabled
route.1.devname=br0
route.1.gateway=10.0.0.1
route.1.ip=0.0.0.0
route.1.netmask=0
route.1.status=enabled
route.status=enabled
tshaper.status=disabled
users.1.name=ubnt
users.1.password=
users.1.status=enabled
users.status=enabled
wireless.1.addmtikie=enabled
wireless.1.ap=
wireless.1.authmode=1
wireless.1.compression=disabled
wireless.1.devname=ath0
wireless.1.fastframes=enabled
wireless.1.frameburst=enabled
wireless.1.hide_ssid=disabled
wireless.1.l2_isolation=disabled
wireless.1.mac_acl.1.mac=
wireless.1.mac_acl.1.status=disabled
wireless.1.mac_acl.10.mac=
wireless.1.mac_acl.10.status=disabled
wireless.1.mac_acl.11.mac=
wireless.1.mac_acl.11.status=disabled
wireless.1.mac_acl.12.mac=
wireless.1.mac_acl.12.status=disabled
wireless.1.mac_acl.13.mac=
wireless.1.mac_acl.13.status=disabled
wireless.1.mac_acl.14.mac=
wireless.1.mac_acl.14.status=disabled
wireless.1.mac_acl.15.mac=
wireless.1.mac_acl.15.status=disabled
wireless.1.mac_acl.16.mac=
wireless.1.mac_acl.16.status=disabled
wireless.1.mac_acl.17.mac=
wireless.1.mac_acl.17.status=disabled
wireless.1.mac_acl.18.mac=
wireless.1.mac_acl.18.status=disabled
wireless.1.mac_acl.19.mac=
wireless.1.mac_acl.19.status=disabled
wireless.1.mac_acl.2.mac=
wireless.1.mac_acl.2.status=disabled
wireless.1.mac_acl.20.mac=
wireless.1.mac_acl.20.status=disabled
wireless.1.mac_acl.21.mac=
wireless.1.mac_acl.21.status=disabled
wireless.1.mac_acl.22.mac=
wireless.1.mac_acl.22.status=disabled
wireless.1.mac_acl.23.mac=
wireless.1.mac_acl.23.status=disabled
wireless.1.mac_acl.24.mac=
wireless.1.mac_acl.24.status=disabled
wireless.1.mac_acl.25.mac=
wireless.1.mac_acl.25.status=disabled
wireless.1.mac_acl.26.mac=
wireless.1.mac_acl.26.status=disabled
wireless.1.mac_acl.27.mac=
wireless.1.mac_acl.27.status=disabled
wireless.1.mac_acl.28.mac=
wireless.1.mac_acl.28.status=disabled
wireless.1.mac_acl.29.mac=
wireless.1.mac_acl.29.status=disabled
wireless.1.mac_acl.3.mac=
wireless.1.mac_acl.3.status=disabled
wireless.1.mac_acl.30.mac=
wireless.1.mac_acl.30.status=disabled
wireless.1.mac_acl.31.mac=
wireless.1.mac_acl.31.status=disabled
wireless.1.mac_acl.32.mac=
wireless.1.mac_acl.32.status=disabled
wireless.1.mac_acl.4.mac=
wireless.1.mac_acl.4.status=disabled
wireless.1.mac_acl.5.mac=
wireless.1.mac_acl.5.status=disabled
wireless.1.mac_acl.6.mac=
wireless.1.mac_acl.6.status=disabled
wireless.1.mac_acl.7.mac=
wireless.1.mac_acl.7.status=disabled
wireless.1.mac_acl.8.mac=
wireless.1.mac_acl.8.status=disabled
wireless.1.mac_acl.9.mac=
wireless.1.mac_acl.9.status=disabled
wireless.1.mac_acl.policy=allow
wireless.1.mac_acl.status=disabled
wireless.1.macclone=disabled
wireless.1.rssi_led1=1
wireless.1.rssi_led2=15
wireless.1.rssi_led3=22
wireless.1.rssi_led4=30
wireless.1.security=none
wireless.1.signal_led1=94
wireless.1.signal_led2=80
wireless.1.signal_led3=73
wireless.1.signal_led4=65
wireless.1.sper=disabled
wireless.1.ssid=ubntap
wireless.1.status=enabled
wireless.1.wds=disabled
wireless.1.wmm=enabled
wireless.1.wmmlevel=4
wireless.status=enabled
wpasupplicant.device.1.profile=
wpasupplicant.device.1.status=disabled
wpasupplicant.profile.1.name=
wpasupplicant.profile.1.network.1.bssid=
wpasupplicant.profile.1.network.1.key_mgmt.1.name=
wpasupplicant.profile.1.network.1.psk=
wpasupplicant.status=disabled

[jschaffin]

On the off-chance that someone is reading this or stumbles across it:

1) I tried the lower XMIT power, and it drastically increased the dropouts. So we went back to the full 26, or whatever the default ends up being with the driver. To me it looks like 16 in the downloaded configs.

2) The customer switched the units to use Channel 6, and the dropouts disappeared for a while (see #3). Even though there are 3 other APs in the site survey using Channel 6. So, it would be helpful to know how busy a particular channel is at a location, and that will require an investment in a spectrum analyzer. Guess which one I'll be buying.

3) Those APs in channel 6 started getting busy around 6pm and generating interference. From the looks of them (default AP names), they're probably consumer units and the owners got home from work and started doing their internet thing. I also bet that the industrial unit on Channel 11 went quiet around 5pm.

A simple solution would be a "channel schedule." I might see if I can hack something together with a script.

OK, then.

[UBNT-Edmundas]

I would like to recommend to test your wireless link using all available channels (not only 11 and 6). Possible, that in other channel you will find many AP, but without high traffic and interference. Next step would be configure channel shifting and 5/10MHz channel width.

Also please try to enable/disable Noise Immunity option.

-Edmundas

[jschaffin]

Edmundas,

What would be the advantage of Channel Shifting? From reading the wiki, it looks like that only makes the Ubnt nodes invisible to non-Ubnt wireless nodes.

I'll check the Noise Immunity settings next time I'm at the customer location.

Thanks,
Scott

[UBNT-Edmundas]

Yes, using channel shifting and 5/10 mhz width means that non-ubiquity radios will not be able to communicate with your radios. So you will prevent your radios from unwanted association requests and other traffic.