" 10G Base-T not yet ready: 10G Base-T technology, which allows 10Gbps Ethernet to run over twisted pair, cannot currently provide a low-enough level of power consumption and latency. For example, the current 10G Base-T power consumption approximates 2.0 Watt per port for a distance of 10 meter, and we believe it needs to be less than 1.0 Watt as it is with 1G Base-T. An alternative technology, the SFP+ DAC (Direct Attached Copper) has been invented to overcome the 10G Base-T issues, but it is very expensive for mass deployment.
" Continued interest in 1Gbps: The 1Gbps speed is still attractive for IT managers who want to isolate certain types of traffic, such as management, for better bandwidth control or security reasons. We have observed that many Romley-based server offerings by major vendors -- HP, IBM and Dell -- are integrating either a quad port 1Gbps connection or a mix of two ports 1Gbps and two ports 10Gbps, which is a testament to continued customer interest in 1Gbps.
" Choice of protocol: IT managers are still evaluating the 10Gbps Fibre Channel over Ethernet (FCoE) to converge their Storage Area Network (SAN) and Ethernet traffic, which might be delaying 10Gbps purchases.
" Choice of brand: While the 1Gbps shipments are dominated by two vendors, Broadcom and Intel, the 10Gbps market is attracting new entrants that have loyal customer bases, such as Fibre Channel server connectivity vendors Emulex and QLogic, and InfiniBand server connectivity vendor Mellanox. Hence, server vendors have to find some ways to accommodate various customers' brand requirements.
10Gbps server migration: Catalysts and outlook