BIG-IP to Cisco via 10Gb SFP+ Direct Attach Copper

Let me hop on this rather old toppic and add a question:

The product catalog entry of the F5 DAC-cable says: "for connecting the SFP+ ports on your F5 platform to the SFP+ modules on an upstream switch."

Since F5 has no own switches...which switch do they refer to? I mean, does F5 think they are the only company with "own brand only support" restriction?

Let's bring it down to numbers: I want to connect my LTM pair to my Nexus pair. So i can choose to spend $8000 on SFP+ (4 of each vendor) or $200 on 4 DAC cables to achieve the same goal.

Proportionality anyone?