1Gbps on 6120XG downlink ports?

[ivaideanu]

I'm trying to figure out whether the 6120XG blade switch will work with the 1GbE interfaces embedded into BL260c G5 and BL280c G6 - the quickspecs sheet of 6120XG says it's compatible with those servers, but I can only find references on 1G/10G autosensing about the external / uplink ports (nothing about the internals).

Also, should I expect trouble if I "pair" a 6120XG with a GbE2c (we have a mix of BL260c G5, BL280c G6, BL460c G6 and BL490c G6 in that C7000 chassis)?  Right now we have GbE2cs everywhere, but there is a requirement of cut-through switching between the second NIC of two particular servers...

Many thanks in advance.