Odd DHCP addresses appearing

We have a few IP addresses leased out on our DHCP server that we don't
recognise. The hostnames are all of the format

lastfouroctetsofMACadddress.ourDNSdomainname.com

Troubleshooting today, we traced one of these MAC addresses to a particular
switch port. The cable in the port was connected to one of two NICs on a
server which has those two NICs teamed using Broadcom software.

Trouble is, that NIC does *not* have the MAC address seen at the switch
(neither does its teamed partner). Windows does *not* have TCP/IP configured
for that NIC, and the Broadcom BASC shows both physical NICs as IP Address:
N/A.

Anyone have any idea what on Earth is going on here? Can't find anything in
the Broadcom documentation to suggest that the teamed NICs also pick up DHCP
addresses using different MACs.

"Andy Mellor" <Andy (E-Mail Removed)> wrote in message news:2308683C-A9B7-4B5E-A0EB-(E-Mail Removed)...
> We have a few IP addresses leased out on our DHCP server that we don't
> recognise. The hostnames are all of the format
>
> lastfouroctetsofMACadddress.ourDNSdomainname.com
>
> Troubleshooting today, we traced one of these MAC addresses to a particular
> switch port. The cable in the port was connected to one of two NICs on a
> server which has those two NICs teamed using Broadcom software.
>
> Trouble is, that NIC does *not* have the MAC address seen at the switch
> (neither does its teamed partner). Windows does *not* have TCP/IP configured
> for that NIC, and the Broadcom BASC shows both physical NICs as IP Address:
> N/A.
>
> Anyone have any idea what on Earth is going on here? Can't find anything in
> the Broadcom documentation to suggest that the teamed NICs also pick up DHCP
> addresses using different MACs.


Never heard of this happening either with Broadcom Teaming. If you break the team and recreate it, does it happen again? Possibly break the team, set a static IP on each NIC, then recreate the team.


--
Ace

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Ace Fekay, MCSE 2003 & 2000, MCSA 2003 & 2000, MCSA Messaging, MCT
Microsoft Certified Trainer
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