The Brocade SilkWorm 4900 is a high-performance, high-availability Fibre Channel switch that provides high port density for addressing mission-critical storage requirements. With a flexible architecture that supports 1, 2, and 4 Gbit/sec technology with 32, 48, or 64 ports, the SilkWorm 4900 provides an affordable high-port-count, single-domain solution.
The SilkWorm 4900 provides "pay-as-you-grow" scalability through flexible Ports on Demand capabilities. Because it is fully compatible with previous 1 and 2 Gbit/sec devices, the SilkWorm 4900 protects existing technology investments while providing a strategic solution for the future.SILKWORM 4900 SPECIFICATIONSSystems ArchitectureFibre Channel ports 64 ports, universal (E, F, and FL)Scalability Full fabric architecture with 239 switches maximumCertified maximum 56 switches, 7 hops; larger fabrics may be certifiedas requiredPerformance 1.063 Gbit/sec line speed, full duplex; 2.125 Gbit/secline speed, full duplex; 4.25 Gbit/sec line speed, fullduplex and auto-sensing of 1, 2, and 4 Gbit/sec portspeeds; optionally programmable to fixed port speed;speed matching between 1, 2, and 4 Gbit/sec portsISL Trunking Up to eight 4 Gbit/sec ports per ISL trunk;up to 32 Gbit/sec per ISL trunkAggregate bandwidth 512 Gbit/sec end to endFabric latency ~700 nanoseconds within a locally switched groupand <2.4 μsec with no contention, cut-through routingat 4 Gbit/sec between locally switched groupsMaximum frame size 2112-byte payloadClasses of service Class 2, Class 3, Class F (inter-switch frames)Port types FL_Port, F_Port, and E_Port; self-discovery based on switch type (U_Port)Data traffic types Fabric switches supporting unicast and broadcastMedia types Hot-pluggable, industry-standard Small Form-factorPluggable (SFP), LC connector; Short-WavelengthLaser (SWL) up to 500 meters (1640 feet);Long-Wavelength Laser (LWL) up to 10 km (6.2 mi);Extended Long-Wavelength Laser (ELWL) up to 80 km(49.6 mi); distance depends on fiber-optic cable and port speed, CWDM SFPs (8 lambdas).Fabric services Simple Name Server; Registered State Change Notification (RSCN).Optional fabric services include:Brocade Advanced Zoning, Brocade Fabric Watch,Brocade Extended Fabrics, Brocade Remote Switch,Brocade ISL Trunking, Brocade Advanced PerformanceMonitoring, Brocade Web ToolsOptions SFP media