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

14-2 Web Tools Administrator’s Guide
Publication Number: 53-0000194-01
14
- N4—Negotiated 4 Gbit/sec
- Auto-Negotiation
• Buffer Needed/Allocated—The number of buffers needed and the number of buffers that are
actually allocated.
• 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 14-1 on
page 14-3), 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 14-1 describes the long-distance settings and identifies which settings
require a Brocade Extended Fabrics license.
Figure 14-1 Extended Fabric Tab