Brocade Fabric OS Command Reference Guide v6.1.0 (53-1000599-02, June 2008)

424 Fabric OS Command Reference
53-1000599-02
portBufferShow
2
portBufferShow
Displays the buffer usage information for a port group or for all port groups in the switch.
Synopsis portbuffershow [[slotnumber/]portnumber]
Description Use this command to display the current long distance buffer information for the ports in a port
group. The port group can be specified by giving any port number in that group. If no port is
specified, then the long distance buffer information for all of the port groups of the switch is
displayed.
The following long distance information is displayed:
User Port Index number of the port.
Port Type E (E_Port), F (F_Port), G (G_Port), L (L_Port), or U (U_Port).
Lx Mode Long distance mode.
L0 Link is not in long distance mode.
LE Link is up to 10 km.
LD Distance is determined dynamically.
LS Distance is determined statically by user input.
Max/Resv Buffers The maximum or reserved number of buffers that are allocated to the port
based on the estimated distance (as defined by the desired_distance
operand of the portCfgLongDistance command). If the port is not configured
in long distance mode, certain systems might reserve buffers for the port.
This field then displays the number of buffers reserved for the port.
Buffer Usage The actual number of buffers allocated to the port. In LD mode, the number is
determined by the actual distance and the user-specified desired distance
(as defined by the desired_distance operand of the portCfgLongDistance
command).
Needed Buffers The number of buffers needed to utilize the port at full bandwidth (depending
on the port configuration). If the number of Buffer Usage is less than the
number of Needed Buffers, the port is operating in the buffer limited mode.
Link Distance For L0 (not in long distance mode), the command displays the fixed distance
based on port speed, for instance: 10 km (1 Gbps), 5 km (2 Gbps), 2 km (4
Gbps), or 1 km (8 Gbps). For static long distance mode (LE), the fixed
distance of 10 km displays. For LD mode, the distance in kilometers displays
as measured by timing the return trip of a MARK primitive that is sent and
then echoed back to the switch. LD mode supports distances up to 500 km.
Distance measurement on a link longer than 500 km might not be accurate.
If the connecting port does not support LD mode, is shows “N/A”.
Remaining Buffers The remaining (unallocated and reserved) buffers in a port group.
A hyphen in one of the display fields indicates that no relevant information is available; there may
be no connection to a port, or the port is disabled, or the port is not an E_Port.
Note The execution of this command is subject to Admin Domain restrictions that may be in place. Refer
to chapter 1, "Understanding Admin Domain Restrictions" and Appendix A, "Command Availability"
for details.