Brocade Web Tools Administrator's Guide v6.2.0 (53-1001194-01, April 2009)

Web Tools Administrator’s Guide 189
53-1001194-01
Configuring a port for long distance
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 in order to avoid fabric segmentation.
1. Open the Switch Administration window as described on page 41.
2. Click the Extended Fabric tab.
3. Click Show Advanced Mode.
4. This step is switch-specific:
For Brocade DCX and Brocade 48000 enterprise-class platforms, click the slot subtab that
corresponds to the correct slot for the logical switch.
For Brocade 200E, 300, 4012, 4016, 4018, 4020, 4024, 4100, 4900, 5000, 5100, 5300,
7600 switches, the 7500 and 7500E Extension switches, and the Encryption Switch, proceed
directly to the next step.
5. Select a distance that corresponds to the port from the Long Distance menu.
Depending on the distance selected, this might require an optional license. For information
about the various distances, see Table 16.
If you select a long-distance setting of LD or LS, you must also type a value in the Desired
Distance column for that port number:
a. Double-click the Desired Distance field for the port, as shown in Figure 91.
b. Type a number in the field to indicate the distance in kilometers. The allowed values
depend on the port capability:
• If the port capability is 8 GB, type a number between 10 and 63 inclusive.
• If the port capability is 4 GB, type a number between 10 and 125, inclusive.
TABLE 16 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 Gbps, 2 Gbps, and 4 Gbps,
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 Gbps, 250 km
at 2 Gbps, or 125 km at 4 Gbps, 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 Gbps, 250 km
at 2 Gbps, or 125 km at 4 Gbit/sec, depending on the switch platform and
the availability of frame buffers within the port group
Yes