2950 load balancing two Windows 2003 servers

[acarmical]

We just purchased two Windows 2003 servers that connect directly to a 2950. They have setup network load balancing on the servers. With this setup both of the servers have the same MAC address cloned to their NICS. This is obviously causing a problem with the ARP table on the 2950. I opened a TAC case, and they said it was a Microsoft problem. The vendor that installed the servers says it the switch. Has anybody ever done this?

Thanks

[acarmical]

Forgot to mention that I can't ping either of the servers. We have tried static ARP entries also.

[yves.grohens]

Hello,

I think you would speak about "MAC address table" and not "ARP table" for your 2950 switch. It's typically a trouble known by Microsoft and describe here :

http://support.microsoft.com/default.aspx?scid=kb;en-us;193602

Regards

Yves

[acarmical]

Thanks for the article!!! I was doing a search for NLB(network load balancing), and not WLBS. Learned a new acronym.

We removed the gateway on the administrative network adapter, and we haven't had any problems.