Wireless bridge: duplicate MAC addresses ?

Hi guys,

I'm trying to connect 2 offices with 2 Senao ECB3220 devices. 1 device
functions as Access Point, the other one as Bridge. Both devices are
connected to 3com switches. Both devices are in the 192.168.1.x subnet.
On the bridge side, there's also a router which connects the
192.168.2.x network, so each building has its own subnet.

Now, when the 2 devices connect, al lot of machines in the 192.168.1.x
subnet receive ip conflict messages (event id 4199) which indicates a
duplicate MAC address.

What is happening here ?

--

Are you sure there isn't a network loop? That would be my guess.

Are they showing duplicate MAC's for their MAC, or for a specific MAC?

Chris

> Are you sure there isn't a network loop? That would be my guess.
>
> Are they showing duplicate MAC's for their MAC, or for a specific MAC?

They are all showing the MAC address of the bridge.

I'm sure there's no loop.

Thanks!

RLM <redlob+(E-Mail Removed)> wrote in
news:slrneljjip.1sks.redlob+(E-Mail Removed):

> Hi guys,
>
> I'm trying to connect 2 offices with 2 Senao ECB3220 devices. 1 device
> functions as Access Point, the other one as Bridge. Both devices are
> connected to 3com switches. Both devices are in the 192.168.1.x subnet.
> On the bridge side, there's also a router which connects the
> 192.168.2.x network, so each building has its own subnet.
>
> Now, when the 2 devices connect, al lot of machines in the 192.168.1.x
> subnet receive ip conflict messages (event id 4199) which indicates a
> duplicate MAC address.
>
> What is happening here ?
>

.......indicates a duplicate IP address.

When you say a 'a lot of machines in the 192.168.1.x subnet receive ip
conflict messages', does this mean that each machine receiving this
message has a conflict, OR, is this a broadcast message sent behind the
scenes using WindowsMessenger service ? You know 'net send * BOOO!'.

If you know the MAC address listed in the conflict is the client bridge,
then change it's IP address to something else, static, to see if the
problem goes away. OR Check DHCP scopes. The bridge may be static and
whatever you have doing DHCP hands out that address.

How does the router come into play ? You say (about the wireless) they
are both connected to 3Com switches. Then you throw in a router, and two
separate subnets at the buildings.

Regards,

DanS