HP StorageWorks Fabric OS 6.2 administrator guide (5697-0016, May 2009)

432 Administering extended fabrics
3. Disable the credit recovery; credit recovery is not compatible with the IDLE mode. If you do not disable
the credit recovery, it continues to perform a link reset.
switch: admin> portcfgcreditrecovery –disable <slot/port>
4. Configure the port to support long-distance links.
switch: admin> portcfglongdistance <slot/port>,LS,0,100
Extended Fabrics device limitations
Extended Fabrics is normally not implemented on the following device:
• The HP StorageWorks B-Series iSCSI Director Blade has eight Gigabit Ethernet ports and eight FC
ports. It is used to implement the iSCSI Gateway Service. The Gigabit Ethernet ports are used to
connect iSCSI initiators, and the FC ports are used to connect to any device.
Configuring an extended ISL
Before configuring an extended ISL, ensure that the following conditions are met:
• Be sure that the ports on both ends of the ISL are operating at the same port speed, and can be
configured at the same distance level without compromising local switch performance.
NOTE: A long-distance link also can be configured to be part of a trunk group. Two or more
long-distance links in a port group form a trunk group when they are configured for the same speed, the
same distance level, and their link distances are nearly equal. For information on trunking concepts and
configurations, see Chapter 20, ”Administering ISL trunking” on page 435.
• Use only qualified HP B-Series SFPs. These are the only SFPs supported on the 8Gb products.
1. Connect to the switch and log in using an account assigned to the admin role.
2. Enter the switchDisable command.
3. Enter the configure command to set the switch fabric-wide configurations. You can set the following
fabric-wide settings (* = multiplication symbol):
4. Enter the portCfgLongDistance command, using the following syntax:
portcfglongdistance [slotnumber/]portnumber [distance_level]
[vc_translation_link_init] [desired_distance]
where:
Field Type Default Range
Domain Number 1 Varies
R_A_TOV Number 1000 E_D_TOV * 2 to 120000
E_D_TOV Number 2000 1000 to R_A_TOV/2
WAN_TOV Number 0 0 to R_A_TOV/4
MAX_HOPS Number 7 7 to 19
slotnumber For blades, the slot number in which the blade is located. The slot number
must be followed by a slash (/) and the port number. This option is not
used for fixed-port switches.
portnumber The port number.