HP AE370A - Brocade 4Gb SAN Switch 4/12, Administrator'S Manual

Page: 331 / 447

Fabric OS 5.2.x administrator guide 331
To configure an extended ISL
1. Connect to the switch and log in as admin.
2. If the fabric contains HP StorageWorks 1 GB extended ISLs, use the
switchDisable
command to
disable the switch and then use the
configure
command to set the fabric-wide configuration
parameter
fabric.ops.mode.longDistance
to 1 on all switches in the fabric.
3. Enter the
portCfgLongDistance
command, using the following syntax:
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 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:
portcfglongdistance [
slotnumber
/]
portnumber
[
distance_level
] [
vc_translation_link_init
]
[
desired_distance
]
slotnumber Specify the slot number for 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 Specify the port number.
distance_level Specify the ISL mode to be set on the port (refer to Table 67 ).
vc_translation_link_init
This extended link initialization sequence, which is an enhanced
link reset protocol, avoids 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 v3.0.2c or v4.0.2.
It must be set to 1 (enabled) when configuring a trunk over
extended fabrics.
desired_distance 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 v4.4.0
do not support this parameter.)
Note: For 4/256 SAN Director with FC4-16 or FC4-32 port
blades, ports will be shown as buffer limited.
switch:admin> portcfglongdistance 1/1 LD 1 50