Dell PowerEdge M710 Web Tools Administrator’s Guide - Page 209

DRAFT: BROCADE CONFIDENTIAL Administering Extended Fabrics Chapter 14 In this chapter •Extended link buffer allocation overview 181 •Configuring a port for long distance 183 Extended link buffer allocation overview If the link is used over long distances, use the Extended Fabric tab of the Switch Administration window to configure the long-distance setting of a port. Because buffer credits are a switch resource, you must own the switch in order to modify extended fabric settings on a port. The EGM license must be enabled on the switch; otherwise, access to configuring long distance is denied and an error message displays. The Extended Fabric tab displays information about the port speed, long-distance settings, and buffer credits, as shown in Figure 54 on page 182. For detailed information on managing extended fabrics, refer to the Fabric OS Administrator's Guide. The Extended Fabric tab displays the following information: • Port Number • Buffer Limited-Indicates whether the port is buffer limited. A buffer-limited port can come online with fewer buffer credits allocated than its configuration specifies, allowing it to operate at a reduced bandwidth instead of being disabled for lack of buffers. Buffer-limited operation is supported for the LS and LD extended ISL modes only and is persistent across reboots, switch disabling and enabling, and port disabling and enabling. • Port Speed-The port speed is displayed as follows: - 1G-1 Gbps - 2G-2 Gbps - 4G-4 Gbps - 8G-8 Gbps - N1-Negotiated 1 Gbps - N2-Negotiated 2 Gbps - N4-Negotiated 4 Gbps - 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 (Table 16 on page 183), the desired distance, in kilometers, for the link. Web Tools Administrator's Guide 181 53-1001772-01