혹자에게는 너무도 당연한... 그러나 혹자에게는 생소한 ...
10Gb NIC가 1Gb로 동작할까 ..?
당연히 하위 호환성을 갖는다 ...
Intel X520 DA2 Ethernet Server Adapter
http://www.dell.com/us/enterprise/p/intel-x520-da2/pd?~ck=anav
Intel® 10 Gigabit Network Adapter Considerations
Intel® 10 Gigabit adapters that support 1 gigabit speed allow you to configure the Speed setting. If this option is not present, your adapter only runs at its native speed.
If the adapter cannot establish link with the gigabit link partner using auto-negotiation, set the adapter to 1 Gbps Full duplex.
Intel 10 gigabit fiber-based adapters and SFP direct-attach devices operate only in full duplex, and only at their native speed. Multi-speed 10 gigabit SFP+ fiber modules support full duplex at 10 Gbps and 1 Gbps.
인텔® 이더넷 어댑터 사용자 안내서
http://downloadcenter.intel.com/Detail_Desc.aspx?agr=N&DwnldID=11848
http://downloadmirror.intel.com/11848/eng/PROINFO.zip
Broadcom NetXtreme II 57711 Network Interface Card
http://www.dell.com/us/enterprise/p/broadcom-netxtremeii-57711/pd
BCM57711
http://www.broadcom.com/products/Ethernet-Controllers/Enterprise-Server/BCM57711
Network interfaces:
-Dual-port 1000BASE-KX/2500BASE-KX/10GBASE-KX4/XAUI/10GBASE-CX4 interfaces for 1 Gbps/2.5 Gbps/10 Gbps operation
-IEEE 802.3ap clause 73-compliant backplane operation
-IEEE 802.3xx clause 37-compliant auto-negotiation for 1 Gbps and 2.5 Gbps
