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

188 Web Tools Administrator’s Guide
53-1001194-01
Extended link buffer allocation overview
14
• Actual Distance (km)—The actual distance for the link in kilometers.
• Desired Distance (km)—Required for a port configured in LD or LS mode (see Table 16 on
page 189), 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 16 describes the long-distance settings and identifies which settings
require a Brocade Extended Fabrics license.
FIGURE 91 Extended Fabric tab
For Brocade DCX and DCX-4S enterprise-class platforms, the slots for CP are not available.
You can view only two FC and two logical ports in the Extended Fabric tab for the 7500E Extension
switches without upgrade license.
The Brocade Encryption Switch and the FS8-18 Encryption blade support auto-negotiated link
speeds of 1, 2, 4, and 8 Gbps. The GE ports are always locked at 1 Gbps.