HP StorageWorks 2.128 SAN Director Switch - Manual (Page 166)

166 Administering extended fabrics
3. Issue the
portCfgLongDistance
command, using the following syntax:
portcfglongdistance [slotnumber/]portnumber [distance_level]
[vc_translation_link_init] [desired_distance]
4. Repeat step 3 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 is reconfigured.
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:
Trunking over distance
See ” Trunking over extended fabrics ” on page 173.
where:
slotnumber
Specifies the slot number for Core Switch 2/64, SAN Director
2/128, and 4/256 SAN Director. This option is not applicable
to fixed-port switches. The slot number must be followed by a
slash ( / ) and the port number.
portnumber
Specifies the port number.
distance_level
Specifies the ISL mode to be set on the port (see Table 30 on
page 164).
vc_translation_l
ink_init
Is an extended link initialization sequence, which is an enhanced
link reset protocol, and prevents excessive resetting of ports.
By default this option is set to 1 (enabled).
To prevent fabric segmentation, this option must be set to 0
(disabled) when connecting to switches running Fabric OS
versions earlier than 3.0.2c or 4.0.2.
It must be set to 1 (enabled) when configuring a trunk over
extended fabrics.
desired_distance
Is required for a port configured for LD mode. Specify the desired
distance, in kilometers, for the link. The specified value is the
upper limit for calculating buffer availability for the port. If the
measured distance is more than the specified
desired_distance
, the port is allocated the number of buffers
required by the specified desired distance. (Fabric OS versions
earlier than 4.4.0 do not support this parameter.)
Note that for a 4/256 SAN Director with FC4-16 or FC4-32 port
blades, ports are shown as buffer-limited.
switch:admin> portcfglongdistance 1/1 LD 1 50
switch:admin>