HP StorageWorks 4/64 Brocade Converged Enhanced Ethernet Administrator's Guide - Page 26
FCOE10-24 blade, Fabric OS Administrator's Guide
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1 FCoE overview Each of the embedded FCoE ports supports four logical traffic paths. These four logical traffic paths share the FCoE port bandwidth. Any single traffic path may use the entire 10-Gbps of FCoE port bandwidth if available, but it must share the bandwidth equally with the other logical path traffic flows if more than one is active. The bandwidth available to any single logical traffic path (and therefore any single FCoE-to-FC traffic flow) is between 2.5 Gbps and 10 Gbps. While they share the FCoE port bandwidth, the logical traffic paths are independent from one another in the event of downstream congestion. If the traffic flowing on one logical path stalls because of congestion, the traffic flowing on the other logical paths on the same FCoE port is not affected. Note however, that a logical traffic path is not limited to a single FCoE-to-FC traffic flow. If multiple traffic flows are sharing the same logical traffic path, congestion independence between the flows cannot be enforced. FCOE10-24 blade The FCOE10-24 blade has 24 Fibre Channel over Ethernet (FCoE) ports that enables the transmission of FC frames over an Ethernet network via encapsulation in standard Ethernet packets. This is enabled by adherence to Converged Enhanced Ethernet (CEE) standards, a low latency, lossless Ethernet standard. This does not require dedicated Ethernet lines, but rather can make use of existing Ethernet infrastructure to reduce costs. The FCOE10-24 blade supports only optical cabling and transceivers (SFP+). There are no licensing requirements for functionality on this blade. Refer to the Fabric OS Administrator's Guide for information on configuring these features. The FCOE10-24 blade provides the following hardware features: • 24 FCoE ports operating at 10 Gbps • 32 FC ports operating at 8-Gbps through the backplane • Hot pluggable • I2C Management interface through the backplane • JTAG support • Blade power and status LEDs • Link status LEDs per port The FCOE10-24 blade also provides the following functionality features: • FCoE switching • CEE switching • L2 Ethernet protocols STP/MSTP/RSTP, 802.1q, and Link Aggregation (802.1ad) • Standard Ethernet encapsulation 6 Converged Enhanced Ethernet Administrator's Guide 53-1001346-01