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

Web Tools Administrator’s Guide 163
53-1000606-01
Chapter
13
Administering Extended Fabrics
In this chapter
This chapter contains the following information:
• “About extended link buffer allocation,” next
• “Configuring a port for long distance” on page 165
About extended link buffer allocation
The Extended Fabric tab of the Switch Administration window displays information about the port
speed, long-distance setting, and buffer credits, as shown in Figure 74 on page 164. Use this tab 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.
For detailed information on managing extended fabrics, see the Fabric OS Administrator’s Guide.
NOTE
You do not need to use the Extended Fabrics feature unless the link is used over long distances.
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 L0 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 Gbit/sec
• 2G—2 Gbit/sec
• 4G—4 Gbit/sec
• 8G—8 Gbit/sec
• N1—Negotiated 1 Gbit/sec
• N2—Negotiated 2 Gbit/sec
• 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.