Brocade Web Tools Administrator's Guide (53-0000194-01, November 2006)

Web Tools Administrator’s Guide 14-3
Publication Number: 53-0000194-01
14
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 3-3.
2. Click the Extended Fabric tab.
3. This step is switch-specific:
For SilkWorm 24000 and 48000 directors, click the slot subtab that corresponds to the correct
slot for the logical switch.
For SilkWorm 200E, 3250, 3850, 3900, 4100, 4900, and 7500 switches, proceed directly to the
next step.
Table 14-1 Long-Distance Settings and License Requirements
Value Description Extended Fabrics
License Required?
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
LD Dynamic setting is enabled. Buffer credits for the given E_Port are
dynamically configured based on the actual link distance, as long as
this is less than the desired distance. If the actual link distance
exceeds the desired distance, the desired distance is used to allocate
the buffers.
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
switch platform and the availability of frame buffers within the port
group.
Yes
LS Static setting is enabled. Buffer credits for the given E_Port are
statically configured based on the desired link distance.
The LS-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
switch platform and the availability of frame buffers within the port
group
Yes