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Server has two 10GBASE-CX4 ports. client has 10GBASE CX4 HBA.

can theybe directly connected with a CX4 cable without the need for a switch? like SAS Infiband connectors?

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You keep asking the same questions over and over again. – ewwhite Dec 30 '10 at 22:25
i dont intend to ask same questions. since i bought the CX4 hardware and looking for a switch someone told be direct access using cable is possible for 1-1 and can save the cost of 10G switch – John-ZFS Dec 31 '10 at 3:00
up vote 2 down vote accepted

Yes, it works perfectly fine without a switch. Give each system an IP on the same subnet.

I've run this setup with dual-port Intel CX4 10GbE cards between a VMware host server and a Sun x4540 storage unit.

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Check if your NICs support auto-MDIX. I think it is a required part of the 10GE standard but I couldn't verify that.

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