Issues with duplicate IP with NIC team on 2008 R2 Enterprise server
dave247 last edited by dave247
So this is an issue I've been having for a while, unable to solve. Also, I don't really know if it's truly a problem, per se, but I know I do not have this problem on my 2012 R2 servers which are NIC teamed.
I have a handful of 2008 R2 Enterprise servers and they have Broadcom NICs (3 of them have Broadcom 5720 QP) with NIC teaming enabled.
A while back, I did a scan with Wireshark to look for duplicate IP addresses and the results I got back all pointed to duplicate uses of IPs on the servers with the NIC teaming. Further inspection revealed that each teamed interface had a different MAC but the same IP was assigned to all interfaces. So, it kind of is and isn't a duplicate IP... more like, multiple MACs on the same system sharing the same IP.
Anyway, I also have NIC teaming enabled on all my 2012 R2 servers and I do not have this issue at all. I have tried upgrading the NIC firmware and software drivers several times. I have also called Dell support and went through a lot of steps to solve the problem but they could not fix it. The only thing I haven't tried is to install a non-Broadcom NIC, which I will do eventually.
In the mean time, I just wanted to see if anyone here has seen this before or if it's even really an issue. I only assume it's an issue because it was my understanding that all the NICs in a team will have the same MAC and IP. That's how it is on 2012 R2 anyway.
ALSO: The rest of the interfaces have different MACs as well. I just highlighted the first two I could find in Wireshark.