Brocade Web Tools Administrator's Guide v6.1.0 (53-1000606-02, June 2008)

Web Tools Administrator’s Guide 167
53-1000606-02
Configuring a port for long distance
13
NOTE
Because buffer credits are a switch resource, you must own the switch in order to modify Extended
Fabric settings on a port.
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.
1. Open the Switch Administration window as described on page 31.
2. Click the Extended Fabric tab.
3. This step is switch-specific:
For Brocade DCX or Brocade 48000 directors, 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,
and 7500 switches, proceed directly to the next step.
4. Select a distance that corresponds to the port from the Long Distance drop-down menu.
Depending on the distance selected, this might require an optional license. For information
about the various distances, see Table 10.
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 74.
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 4 GB, type a number between 10 and 125, inclusive.
• If the port capability is 2 GB, type a number between 10 and 250, inclusive.
• If the port capability is 1 GB, type a number between 10 and 500, inclusive.
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
TABLE 10 Long-distance settings and license requirements (Continued)
Value Description Extended Fabrics License
Required?