Table 1 System architecture specifications (part 2 of 2) 6 IBM Storage Networking SAN128B-6 Switch Performance Fibre Channel: 4.25 Gbps line speed, full duplex; 8.5 Gbps line speed, full duplex;  10.53 Gbps line speed, full duplex; 14.025 Gbps line speed, full duplex; 28.05 Gbps, full  duplex; 112.2 Gbps, full duplex; auto-sensing of 4/8/10/16/32 Gbps port speeds and  capable of supporting 128 Gbps speeds; 10 Gbps optionally programmable to fixed port  speed. Auto-sensing of 4×32 / 4×16 / 4×8 / 4×4 Gbps speeds on the QSFP ports with  FOS v8.2.0. ISL trunking Frame-based trunking with up to eight 32 Gbps connections between a pair of switches  combined to form a single logical ISL with a speed of up to 256 Gbps (512 Gbps full  duplex) per ISL trunk. Exchange-based load balancing across ISLs with DPS included  in FOS. On the QSFP ports 256 Gbps trunks are supported by trunking 2× (4×32 Gbps)  QSFP ports. Aggregate bandwidth 4 Tbps Maximum fabric latency Latency for locally switched ports is < 780 ns (including FEC); compression is 1 μs per  node Maximum frame size 2,112-byte payload Frame buffers 15K frame buffers with dynamic buffer sharing capability across ports Classes of service Class 2, Class 3, Class F (inter-switch frames) Port types D_Port (ClearLink Diagnostic Port), E_Port, EX_Port, F_Port, AE_Port, optional  port-type control Data traffic types Fabric switches supporting unicast Media types Hot-pluggable, industry-standard Small Form-Factor Pluggable Plus (SFP+), LC  connector; Short-Wave Laser (SWL), Long-Wave Laser (LWL); Extended Long-Wave  Laser (ELWL); distance depends on fiber optic cable and port speed. Supports SFP+  (32/16/8 Gbps), SFP+ (16/8/4 Gbps), SFP+ 10 Gbps optical transceivers, 4×32 Gbps  QSFP SWL and 4×16 Gbps QSFP SWL optical transceivers.  USB One USB port for system log file downloads or firmware upgrades Fabric services Monitoring and Alerting Policy Suite (MAPS); Flow Vision; Adaptive Networking  (Ingress Rate Limiting, Traffic Isolation, QoS); Fabric Performance Impact (FPI)  Monitoring; Slow Drain Device Quarantine (SDDQ); Advanced Zoning (default zoning,  port/WWN zoning, broadcast zoning, peer zoning, target-driven zoning); Dynamic Path  Selection (DPS); Extended Fabrics; Enhanced BB Credit Recovery; FDMI; Frame  Redirection; Frame-based Trunking; FSPF; Integrated Routing; ISL Trunking;  Management Server; NPIV; Time Server; Registered State Change Notification  (RSCN); Reliable Commit Service (RCS); Simple Name Server (SNS); Virtual Fabrics  (Logical Switch, Logical Fabric); Read Diagnostics Parameter (RDP) Extension Fibre Channel, in-flight compression (LZO) and encryption (AES-GCM-256); integrated  optional 10 Gbps Fibre Channel for DWDM MAN connectivity