HP StorageWorks 8/80 HP StorageWorks Fabric OS 6.1.x administrator guide (5697 - Page 365

Trunking over Extended Fabrics In addition to the criteria listed in "Standard trunking criteria" on page 358, observe the following criteria for trunking over Extended Fabrics: • ISL Trunking over Extended Fabrics is supported on switches running Fabric OS 4.4.0 and later. • Extended Fabrics and ISL Trunking licenses are required on all participating switches. • The vc_translation_link_init parameter must be set the same on all ports in an extended fabric. When you enter the portCfgLongDistance --vc_translation_link_init command, specify 1 to activate long-distance link initialization sequence; specify 0 to deactivate this mode. If you run the command without specifying a value, 1 is assigned automatically for the long-distance link in VC_RDY flow control; otherwise, 0 is assigned. For a long-distance link not configured for ISL R_RDY mode, this parameter must be set to 1; otherwise, it must be reset to 0. Trunking distances Enhanced trunking support for switches with Condor ASICs is summarized in Table 80. Table 80 Trunking support for SAN Switch 4/32, 4/32B and 4/64 SAN Switch (Condor ASIC) Mode LE L0.5 LD Distance 10 km 25 km 200 km Number of 2 Gbps ports 32 (four 8-port trunks) 32 (four 8-port trunks) 3 (one 3-port trunk) Number of 4 Gbps ports 32 (four 8-port trunks) 15 (one 8-port trunk) 0 LD 250 km 3 (one 3-port trunk) 0 LD 500 km 0 0 Enhanced trunking support for the FC4-48 port blade in the 4/256 SAN Director is summarized in Table 81. Table 81 Trunking support for 4/256 SAN Director and DC Directors with supported blades (Condor and Condor2 ASIC) Mode Distance Number of 2 Gbps ports Number of 4 or 8 Gbps ports LE 10 km 48 (six 8-port trunks) 48 (six 8-port trunks) L0 LD 200 km 4 (one 2-port trunk per Condor) 0 LD 250 km 4 (one 2-port trunk per Condor) 0 LD 500 km 0 0 LS F_Port masterless trunking On edge switches, the masterless trunking feature is called F_Port masterless trunking because it trunks F_Ports; on the switches running in Access Gateway mode, this feature is called Access Gateway N_Port trunking because it trunks the N_Ports. F_Port trunking, provides a Trunk group between a switch (N_Port) in Access Gateway (AG) mode and Condor-based platforms. This feature keeps F_Port(s) from becoming disabled in the case where they are mapped to an N_Port on a switch in Access Gateway mode. With F_Port trunking, any link within a trunk can go off line or become disabled, but the trunk remains fully functional and there are no re-configuration requirements. Fabric OS 6.1.x administrator guide 365