HP StorageWorks 2/64 - Core Switch, Command Reference Manual

Page: 440 / 830

440 Fabric OS commands
Displays the buffer usage information for a port group or for all port groups in the switch.
Synopsis
portbuffershow [ slotnumber/ ][ portnumber ]
Availability
all users
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:
portBufferShow
User Port Displays the area 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 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 or LD when the distance is to be determined dynamically.
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 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.
Remaining Buffers Displays the remaining (unallocated and reserved) buffers in a
port group.