HP StorageWorks 2/16V Brocade Web Tools Administrator's Guide - Supporting Fab - Page 190

13 About extended link buffer allocation - 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 10 on page 169), 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 75 Extended Fabric tab 168 Web Tools Administrator's Guide Publication Number: 53-1000435-01