Cisco VIC 1225 CNA Connectivity Options for 10G Upgrade
I've currently got an opportunity to upgrade a C220M3 UCS server from the standard Intel 1G LOM's to 10G and I'm looking at various ways to achieve this. This is for a standalone UCS server running VMware.
At the present time in this environment there isn't a 10G uplink switch port that can be used to connect a 10G UCS port to, so I'm looking at ways to at least complete the 10G hardware upgrade on the UCS side and have that component completed, while having a transition period of 1G connectivity in the short term.
It seems the VIC 1225 is the obvious choice for this, as price wise it's reasonable and it's fully featured, even if we only need the 10G ethernet (no FCoE in the short term).
One option I was looking at was to use the 1225T model, as this supports 10BaseT backwards compatible with 1000BaseT. However while it's an easy choice on the UCS, Cisco don't seem to have any 10G copper modules on the switch side, except in specific models in the Nexus family. This limits our switching options in the future (this rules out the use of 4500-X's or 3850s for example).
10G fibre is an option, as is Twinax, however this brings me to my next few questions.
The 1225 (UCSC-PCIE-CSC-02) does supports twinax cables, the documentation has a type-o. If you look at the documentation for the c240 M3 that supports the same 1225 adapter, you will see that this card does supports the twinax cables (see attach screenshots). In the documentation it shows that the 1225T supports twinax but this card comes with 2 10GBASE-T ports so it won't support either twinax cables or SFPs.
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