Technical data

Web Tools Administrator’s Guide 8-3
Publication Number: 53-0000522-09
Configuring a Port for Long Distance
8
Configuring a Port for Long Distance
When you configure a long-distance ISL, ensure that the ports on both sides of the ISL have the same
configuration, to avoid fabric segmentation.
To configure a port for long-distance connection
1. Launch the Switch Admin module as described on page 4-3.
2. Click the Extended Fabric tab.
3. This step is switch-specific:
For SilkWorm 12000, 24000, and 48000 directors, click the slot subtab that corresponds to the
correct slot for the logical switch.
For SilkWorm 200E, 3014, 3016, 3250, 3850, 3900, 4012, and 4100 switches, proceed directly to
the next step.
4. Select a port by clicking anywhere in the row for that port.
5. Select a distance from the Long Distance drop-down list that corresponds to the port.
Depending on the distance selected, this might require an optional license. For information about
the various distances, refer to Table 8-1.
If you select a long-distance setting of LD, you must also type a value in the Desired Distance
column for that port number:
Table 8-1 Long-Distance Settings and License Requirements
Value Description Requires Extended
Fabrics License?
L0 No long-distance setting is enabled. The maximum supported link
distance is 10 km, 5 km, or 2.5 km for ports at speeds of 1 Gbit/sec,
2 Gbit/sec, and 4 Gbit/sec, respectively.
No
LE Extended normal setting is enabled, 10 km (6 miles) or less. No
L0.5 25 km (15.5 miles) or less. Yes
L1 Medium long-distance setting is enabled, 50 km (31 miles) or less. Yes
L2 Long-distance setting is enabled, 100 km (62 miles) or less. Yes
LD Dynamic setting is enabled. The LD-level link can operate at
distances up to 500 km at 1 Gbit/sec, 250 km at 2 Gbit/sec, or 125
km at 4 Gbit/sec, depending on the availability of frame buffers
within the port group.
Yes
Note
The SilkWorm 3016 switch has some limitations on the long-distance settings of its
external ports. Refer to the Fabric OS Administrator’s Guide for more information.