RoCE also depends in part on a version of Ethernet that supports so-called priority flow control, a technique for maintaining quality of service that is also used for Fibre Channel over Ethernet. Cisco Systems Nexus switch already supports the flow-control capability and several other vendors will begin supporting it over the next six months, said Sujal Das, a senior director of product management at Mellanox.
Work is still going on in a handful of IEEE committees to hammer out standards that add more robustness to Ethernet networks.
Meanwhile, Teranetics announced the TN8000, a new family of 40 nm transceivers for 10 Gbit/s Ethernet over copper. The 10GBase-T parts include a four-port device that dissipates less than four watts per port while carrying data 100 meters.
Last year, competitor Aquantia announced it will ship in late 2010 10GBase-T transceivers consuming as little as 3.5 W. Another pioneer in the field, Solarflare Communications, announced in August a single-chip 10GBase-T controller that consumes 8W.
"We believe that low-power 40nm designs like [the TN8000] will lead to broader adoption of 10-Gigabit Ethernet over copper in the data center," said Jag Bolaria, senior analyst at The Linley Group in a prepared statement.