HP StorageWorks Fabric OS 6.x administrator guide (5697-7344, March 2008)

370 Administering Extended Fabrics
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]
5. Repeat step 4 for the remote extended ISL port. Both the local and remote extended ISL ports must be
configured to the same distance level. When the connection is initiated, the fabric will reconfigure.
The following example configures slot 1, port 1 for the LD link distance mode, enables the extended link
initialization sequence, and sets the desired distance to 50 kilometers:
switch:admin> portcfglongdistance 1/1 LD 1 50
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.
distance_level One of the following (the numerical value representing each
distance_level is shown in parentheses):
L0 (0) Specify L0 to configure the port to be a regular switch port.
LE (3) Specify LE mode for distances up to 10 Km.
LD (5) Specify LD for automatic long-distance configuration. The
buffer credits for the given E_Port are automatically configured,
based on the actual link distance measured during E_Port
initialization.
LS (6) Specify LS mode to configure a long-distance link with a
buffer allocation based on a fixed desired distance value.
vc_translation_link_in
it
Enables the long-distance link initialization sequence. This
extended link initialization sequence is an enhanced link reset
protocol, and avoids excessive resetting of ports.
By default this option is set to 1 (enabled).
It must be set to 1 (enabled) when configuring a trunk over
Extended Fabrics. It must be set to 1 for a long-distance link not
configured for ISL R_RDY mode; otherwise, it must be reset to 0.
desired_distance For an LD-mode link, desired_distance is a threshold limit for link
distance to ensure buffer availability for other ports in the same
port group. If the measured distance exceeds desired_distance,
then desired_distance is used.
For an LS-mode link, desired_distance is used to calculate the
buffers required for the port.