HP StorageWorks Fabric OS 6.1.x administrator guide (5697-0234, November 2009)

Fabric OS 6.1.x administrator guide 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.
Enhanced trunking support for the FC4-48 port blade in the 4/256 SAN Director is summarized in
Table 81.
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.
Table 80 Trunking support for SAN Switch 4/32, 4/32B and 4/64 SAN Switch (Condor ASIC)
Mode Distance Number of 2 Gbps ports Number of 4 Gbps ports
LE 10 km 32 (four 8-port trunks) 32 (four 8-port trunks)
L0.5 25 km 32 (four 8-port trunks) 15 (one 8-port trunk)
LD 200 km 3 (one 3-port trunk) 0
LD 250 km 3 (one 3-port trunk) 0
LD 500 km 0 0
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