I am in need of a fresh pair of eyes to look into the following issue because I’m running in circles now 
I have a RB2011 (v6.1) which is the main accesspoint. I’ve defined a Virtual Accesspoint (called “AirMAX”) which is connected to a bridge (called “c3-bridge”). The c3-bridge has a DHCP-server and pool assigned and has it’s gateway set to my Internet router. I can connect my wireless devices to AirMAX, they get an IP address and are able to browse to the Internet.
[admin@MikroTik] > /interface wireless print
Flags: X - disabled, R - running
0 R name="AirMAX" mtu=1500 mac-address=D6:CA:6D:D3:04:80 arp=enabled interface-type=virtual-AP master-interface=wlan1 ssid="AirMAX" wds-mode=dynamic wds-default-bridge=airmax-bridge 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=no security-profile=airmax
[admin@MikroTik] > /interface bridge port print
Flags: X - disabled, I - inactive, D - dynamic
# INTERFACE BRIDGE PRIORITY PATH-COST HORIZON
14 AirMAX c3-bridge 0x80 10 none
Now I’d like to add a 751U (v5.24) to extend the range to the other side of the house by using WDS. I’ve created a Virtual Accesspoint on the 751U which has the exact same specs as AirMAX. Same frequency, security profile, etc.
I’ve created a bridge (called “airmax-bridge”) on both routers and assigned 172.16.214.1 on the RB2011 and 172.16.214.2 on the 751U
[admin@MikroTik] > /interface bridge print
Flags: X - disabled, R - running
0 R name="airmax-bridge" mtu=1500 l2mtu=65535 arp=enabled mac-address=D6:CA:6D:D3:04:80 protocol-mode=rstp priority=0x8000 auto-mac=yes admin-mac=00:00:00:00:00:00 max-message-age=20s forward-delay=15s transmit-hold-count=6 ageing-time=5m
The wireless config on the 751U
[admin@MikroTik] > /interface wireless print
Flags: X - disabled, R - running
0 R name="AirMAX" mtu=1500 mac-address=D6:CA:6D:9F:5C:9F arp=enabled interface-type=virtual-AP master-interface=wlan1 ssid="AirMAX" wds-mode=dynamic wds-default-bridge=airmax-bridge 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=no security-profile=airmax
I’ve set both Virtual Accesspoints in “WDS Mode: Dynamic” and “WDS Default Bridge: airmax-bridge”
On the RB2011
[admin@MikroTik] > /interface wireless wds print
Flags: X - disabled, R - running, D - dynamic
0 RD name="wds4" mtu=1500 l2mtu=2290 mac-address=D6:CA:6D:D3:04:80 arp=enabled master-interface=AirMAX wds-address=D6:CA:6D:9F:5C:9F
On the 751U
[admin@MikroTik] > /interface wireless wds print
Flags: X - disabled, R - running, D - dynamic
0 RD name="wds4" mtu=1500 l2mtu=2290 mac-address=D6:CA:6D:9F:5C:9F arp=enabled master-interface=AirMAX wds-address=D6:CA:6D:D3:04:80
When I’m near the RB2011 and connect to AirMAX, I get an IP address and everything works. When I’m near the 751U, it sees AirMAX (I can tell it’s the 751U AirMAX because of the signal strength) but I don’t get an IP address.
What am I missing here?
Grz,
Cobalt