Third NIC on W2K3 and Ex2K3 Killz Connections

Good morning,

I have two W2k3 servers, one is Server, one is Exchange
2003, that have had two NICs for quite some time now.
One NIC is for the user/data access and the other has
been used strictly for the backups. Using the Intel
PRO1000 MT network card, I enabled a third NIC so we
could set it up as a dedicated RPC over HTTP proxy port
for remote e-mail checking.

Whenever the third port is enabled, file and e-mail
access by LAN users slows to a crawl. I do not have
default gateways entered for any but one of the NICs, and
I have disabled NetBIOS over TCP/IP on the other two
ports as well. Does anyone know why my servers lose it
when three NICs are enabled?

Many thanks,
Baba

In news:2399401c45e9b$1d7a4270$(E-Mail Removed),
Baba in <(E-Mail Removed)> posted their thoughts, then I
offered mine
> Good morning,
>
> I have two W2k3 servers, one is Server, one is Exchange
> 2003, that have had two NICs for quite some time now.
> One NIC is for the user/data access and the other has
> been used strictly for the backups. Using the Intel
> PRO1000 MT network card, I enabled a third NIC so we
> could set it up as a dedicated RPC over HTTP proxy port
> for remote e-mail checking.
>
> Whenever the third port is enabled, file and e-mail
> access by LAN users slows to a crawl. I do not have
> default gateways entered for any but one of the NICs, and
> I have disabled NetBIOS over TCP/IP on the other two
> ports as well. Does anyone know why my servers lose it
> when three NICs are enabled?
>
> Many thanks,
> Baba

Usually multihomed DCs, DNS and/or Exchange servers are problematic and not
recommended.

To see if it helps, try changing the binding order to move the NIC on the
LAN to the top of the Binding order.

--
Regards,
Ace

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Ace Fekay, MCSE 2000, MCSE+I, MCSA, MCT, MVP
Microsoft Windows MVP - Active Directory

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