Configuring An Extended Isl - HP A7533A - Brocade 4Gb SAN Switch Base Administrator's Manual

4/256 SAN Director (FR4- 1 8i blades)
For the FR4- 1 8i blade, long distance settings are applicable only to the physical FC_Ports (ports 0- 1 5). Long
distance settings are not applicable to virtual FC_Ports (ports 16-31).
can be configured at various distances.
Table 90 4/256 SAN Director (FR4- 1 8i blades)
Speed
(Gbps)
1
2
4

Configuring an extended ISL

Before configuring an extended ISL, ensure that the following conditions are met.
• Extended ISL support for 1Gb switches is limited as follows:
• To support extended ISLs, the fabric.ops.mode.longDistance parameter must be set to 1 on
all 1Gb switches switches in the fabric. Each switch must be disabled before setting this parameter.
• Extended ISLs are not supported between 1Gb switches and other Brocade models.
• For fabrics that contain a mix of HP StorageWorks models, the fabric.ops.mode.longDistance
parameter must be set to 0 (the default). Under certain circumstances (for example, if you want
extended distance between 3xxx switches) this mode must be enabled (set to 1) on switches running
Fabric OS v3.x or v4.x. Talk to your switch provider for details.
• The ports on both ends of the ISL must have the same configuration.
• Use only qualified SFPs.
To configure an extended ISL
1. Connect to the switch and log in as admin.
2. If the fabric contains 1Gb switches with 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:
portcfglongdistance [slotnumber/]portnumber [distance_level] [vc_translation_link_init]
[desired_distance]
Number of ports allowed at distance (km)
10 km 25 km
16 ports 16 ports
16 ports 16 ports
16 ports 16 ports
50 km 100 km
16 ports 16 ports
16 ports 8 ports
8 ports 4 ports
Fabric OS 5.3.0 administrator guide 359
Table 90 lists the number of ports that
250 km 500 km
6 ports 2 ports
2 ports n/a
n/a n/a