We run a small shop and we use some CCR's as core routers and various RB's as wireless AP's. Clients are mixed windows, linux, etc. Mostly newer Intel AC cards.
We recently moved locations and replaced a RB912UAG-5HPnD + R11e-2HnD with a RB922UAGS-5HPacD (and reused the R11e) in an attempt to refresh our AP with some 802.11ac goodness.
At first glance the setup was straight forward and the clients connect just fine. Soon after though, a few users noticed that their bandwidth was inconsistent, and at most times the performance was waaay under negotiated rates.
At first I thought it was simply congestion, but the more testing we do, the more that seems unlikely. We also ruled out active interference with a scanning tool we borrowed. We're using btest for checking rates to a downstream (from the AP) router.
Sometimes, especially after first associating, we can push nearly advertised rates (200Mbit, 400Mbit) but inevitably, after a few minutes, the test goes to sub 30Mbit but the registration table still shows high rates.
Here is my wireless config:
0 R name="2gn" mtu=1500 mac-address=4C:5E:0C:11:0E:FC arp=enabled interface-type=Atheros AR9300 mode=ap-bridge ssid="radio" frequency=2447 band=2ghz-onlyn channel-width=20/40mhz-eC scan-list=default wireless-protocol=unspecified 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=yes security-profile=radio compression=yes 1 R name="5gac" mtu=1500 mac-address=4C:5E:0C:60:F2:1E arp=enabled interface-type=Atheros AR9888 mode=ap-bridge ssid="radio" frequency=5500 band=5ghz-a/n/ac channel-width=20/40/80mhz-Ceee scan-list=5500 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=yes security-profile=radio compression=yes
2 name="radio" mode=dynamic-keys authentication-types=wpa2-psk unicast-ciphers=aes-ccm group-ciphers=aes-ccm wpa-pre-shared-key="supersecret" wpa2-pre-shared-key="supersecret" supplicant-identity="" eap-methods="" tls-mode=no-certificates tls-certificate=none mschapv2-username="" mschapv2-password="" static-algo-0=none static-key-0="" static-algo-1=none static-key-1="" static-algo-2=none static-key-2="" static-algo-3=none static-key-3="" static-transmit-key=key-0 static-sta-private-algo=none static-sta-private-key="" radius-mac-authentication=no radius-mac-accounting=no radius-eap-accounting=no interim-update=0s radius-mac-format=XX:XX:XX:XX:XX:XX radius-mac-mode=as-username radius-mac-caching=disabled group-key-update=5m management-protection=disabled management-protection-key="supersecret"
Here is an example of the registration table:
The CCQ is always above 50% when looking at the status of the cards, and doesn't change when the tests start to bomb.
# INTERFACE RADIO-NAME MAC-ADDRESS AP SIGNAL-STRENGTH TX-RATE UPTIME 0 5gac AC:D1:B8:BF:B7:01 no -52dBm@6Mbps 780M... 1h32m27s 1 2gn 00:80:92:A0:74:2F no -49dBm@1Mbps 52Mb... 1h32m27s 2 2gn 4C5E0C32FC0B 4C:5E:0C:32:FC:0B no -51dBm@HT40-7 300M... 1h32m27s 3 2gn 8C:3A:E3:47:A4:25 no -64dBm@1Mbps 39Mb... 1h32m17s 4 2gn C0:EE:FB:28:EE:40 no -66dBm@1Mbps 54Mbps 1h28m4s 5 5gac C4:85:08:11:15:52 no -61dBm@HT40-7 300M... 1h17m39s 6 5gac D8:FC:93:A1:2D:EF no -64dBm@6Mbps 351M... 1h2m28s 7 5gac D8:FC:93:12:2B:1D no -59dBm@6Mbps 325M... 34m41s 8 5gac D8:FC:93:A1:FF:C2 no -47dBm@6Mbps 325M... 34m41s 9 5gac D8:FC:93:71:F8:8B no -57dBm@6Mbps 780M... 32m27s 10 2gn 54:27:1E:1A:AE:58 no -63dBm@HT40-1 240M... 7m53s
Some things we've tried:
- disabling either interface
using virtual AP's instead
all combinations of band and width (things seem more stable at lower negotiated rates, but still not fast)
i swear, almost disabling and re-enabling all other advanced settings through trial and error
updating to 6.30rc23 (wireless-cm2)
All of the clients are within 50 ft of the router and there is very little in between.
I am not a wi-fi engineer, and perhaps our new location is just too noisy, but it seems very strange that we know the setup is capable of high speeds, it simply seems to be refusing to do it! I am hoping someone with more skills and knowledge can help pinpoint the issue, or at least offer some insight, so we can take next steps. Ideally it would be something with the software so we can get Mikrotik to fix