> I thought gss 2.0 worked with multiple nics.
It does in the main, although as with the single-NIC situation we are still reliant to some extent on the network card drivers. Also, if the dual NICs are of an identical hardware type, we need the DOS drivers to support configuration options that let them bind to the correct instance of the hardware. There isn't a well-established standard for this, although there is a widely-used convention for settings in the PROTOCOL.INI file to select the PCI-bus bus number and slot number which indentifies the particular NIC, while the UNDI driver has some switches to select this.
I'm not familiar with the acma servers, but the PowerEdge has two identical Intel NICs, so in the absence of any explicit setting to pick the network driver instance, the DOS network drivers may be binding to the first instance of the hardware they find.