Collisions from bridge interface

RouterOS Wireless Networking
1

Hi

I have some kind of routers - RB433 installed with wireless modules in my organization.
All It have a simular configuration. I’ll try to explain my problem:

Eth1 with interface VLAN, it has some ip 192.168.190.xyz/24
Wireless module mode set in bridge ap
Wireles iface and vlan iface are aggregate in a bridge iface

Sometimes routers don’t respond, and I get a message on my gateway-switch (192.168.190.254) like this:

%Sep 19 15:34:42:917 2012 switch ARP/5/DUPIP:- 1 -IP address 192.168.190.22
collision detected, sourced by 000c-429c-d6c7 on GigabitEthernet1/0/1 of VLAN19
0 and 000c-4265-25b9 on GigabitEthernet1/0/1 of VLAN190

Problem - both mac’s are mikrotik mac’s. First mac is the mac of VLAN iface, and the second mac is the mac of bridge iface. And I get error again and again from different devices.

I tried to set address to bridge, tried to disable ARP on VLAN iface, but it didn’t help me.

Maybe I did mistake in this configuration, can you help me?

Thank you

p.s. Sorry for terrible English

2

We solved this problem. It’s all about how to a bridge iface chosing a mac-address. It choose a smallest mac from all ifaces in the bridge. But an important thing is - when some iface in the bridge is not in use, the bridge choose the mac only from active ifaces! It’s mean when a wifi (wlan) iface not in use (nobody connect to it), it’s in an inactive state. The bridge iface choose the new mac-address for self when the wlan iface is wake up and the mac of wlan iface maybe smaller then current mac of bridge. If you set up some ip’s on some iface in bridge you can get message like posted upper. It’s simple to repair it - you need to set an Admin mac on the bridge iface (you can choose a mac with ip-address)