Brocade Fabric OS Command Reference Manual (53-1000240-01, November 2006)

2-430 Fabric OS Command Reference Manual
Publication Number: 53-1000240-01
portBufferShow
2
Note: Enter commands in lowercase only; mixed case is for readability.
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 Displays the index number of the port.
Port Type Displays as E (E_Port), F (F_Port), G (G_Port), L (L_Port), or U (U_Port)
depending on the port type.
Lx Mode Long distance mode. Displays as
L0 when the link is not in long distance mode,
LE when the link is up to 10 Km,
LM when the link is up to 25 Km,
L1 when the link is up to 50 Km,
L2 when the link is up to 100 Km
LD when the distance is to be determined dynamically or
LS when the distance is determined statically by user input.
Max/Resv Buffers Displays the count of the maximum or reserved number of buffers that are
allocated to the port based on the estimated distance (configured 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 Displays the actual number of buffers allocate to the port. In LD mode, the number
is determined by the actual distance and the user-specified desired distance
(configured by the desired_distance operand of the portCfgLongDistance
command).
Needed Buffers Displays the number of buffers that are 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 fixed distance displays based on the port
speed, for instance: 1G as 10 Km, 2G as 5 Km, and 4G as 2 Km. For the static long
distance modes, the fixed distance displays; for instance, LE as 10 Km, LM as 25
Km, L1 as 50 Km, and L2 as 100 Km. For LD mode, the physical 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. The supported distance
measurement is 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 Displays the remaining (unallocated and reserved) buffers in a port group.
When there is no connection to a port or the port is disabled, or the port is not an E_Port some of the
information in this display is not relevant, such as long distance mode, needed buffers, and link distance.
In this case, the irrelevant fields display as hyphens.