Brocade Web Tools Administrator's Guide v6.0.0 (53-1000606-01, April 2008)

164 Web Tools Administrator’s Guide
53-1000606-01
About extended link buffer allocation
13
• Desired Distance (km)—Required for a port configured in LD or LS mode (see Table 10 on
page 164), the desired distance, in kilometers, for the link.
For an LD-mode link, the desired distance is used as the upper limit of the link distance to
calculate buffer availability for other ports in the same port group. If the measured distance is
more than the desired distance, the desired distance is used to allocate the buffers. In this
case, the port operates in degraded mode instead being disabled due to insufficient buffers.
For an LS-mode link, the actual distance is not measured; instead the desired distance is used
to calculate the buffers required for the port.
• Long Distance—Table 10 describes the long-distance settings and identifies which settings
require a Brocade Extended Fabrics license.
FIGURE 74 Extended Fabric tab
For Brocade DCX Director, the slots for CP are not available.
TABLE 10 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