I have a SOHO setup as listed below and am having issues with only one device, and IPAD Pro. Other IPADS, Iphones, Macs all work fine, but this one device will not stay connected to the network.
The device will connect to the network, then the logs show extensive data loss and data from unknown device before booting the device from the network.

I have tried moving the device off of DHCP and putting in a manual IP from IOS. The interesting thing here, is that when I assign the IP Manually, it connects to the network and stays connected, until I add in a DNS server. As soon as i add in a DNS Server, the device is kicked from the network. Not sure what else to try, any advice would be greatly appreciated.

DHCP Lease is set to 3d

uptime: 4h27m11s
version: 6.37.1 (stable)
build-time: Sep/30/2016 10:28:41
free-memory: 7.0MiB
total-memory: 32.0MiB
cpu: MIPS 24Kc V7.4
cpu-count: 1
cpu-frequency: 400MHz
cpu-load: 2%
free-hdd-space: 110.4MiB
total-hdd-space: 128.0MiB
write-sect-since-reboot: 1284
write-sect-total: 197214
bad-blocks: 0%
architecture-name: mipsbe
board-name: RB751U-2HnD
platform: MikroTik



name="wlan1" mtu=1500 l2mtu=1600 mac-address=D4:CA:6D:A4:4C:63 arp=enabled
interface-type=Atheros AR92xx mode=ap-bridge ssid="MTHOME2"
frequency=2412 band=2ghz-g/n channel-width=20mhz scan-list=default
wireless-protocol=any antenna-mode=ant-a 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-clRient-tx-limit=0 hide-ssid=no
security-profile=HomeEnc compression=no


13:51:41 wireless,info 98:01:A7:24:91:96@wlan1: connected
13:51:41 dhcp,info dhcp1 deassigned 192.168.2.106 from 98:01:A7:24:91:96
13:51:42 dhcp,info dhcp1 assigned 192.168.2.106 to 98:01:A7:24:91:96
13:51:49 wireless,info 98:01:A7:24:91:96@wlan1: disconnected, extensive data loss
13:51:49 wireless,info wlan1: data from unknown device 98:01:A7:24:91:96, sent dea
uth
13:51:50 wireless,info 98:01:A7:24:91:96@wlan1: connected
13:51:58 wireless,info 98:01:A7:24:91:96@wlan1: disconnected, extensive data loss
13:51:58 wireless,info wlan1: data from unknown device 98:01:A7:24:91:96, sent dea
uth
13:51:58 wireless,info wlan1: data from unknown device 98:01:A7:24:91:96, sent dea
uth
13:52:01 wireless,info 98:01:A7:24:91:96@wlan1: connected
13:52:06 wireless,info 98:01:A7:24:91:96@wlan1: disconnected, extensive data loss
13:52:06 wireless,info wlan1: data from unknown device 98:01:A7:24:91:96, sent dea
uth

Anyone???

First update your RB to latest Bugfix Release.
Second why you select Antenna a and use g/n with Dual Stream, that can't work...

Thanks for the response, what should my antenna settings be?

I changed the setting from g/n to g and all seems to be happy now. Thanks for yourhelp.