HP StorageWorks 2/64 - Core Switch Command Reference Manual page 389

BW The bandwidth of the output ISL, in Gb/s. It does not apply to the
embedded port.
Cost The cost of the output link used by FSPF routing protocol. Only
applicable if the output link is currently recognized by FSPF.
When requested, statistics are reported below the routing information for each hop. These statistics are
presented for both the input and output ports, for both receive and transmit modes. These statistics are
divided into basic and extended statistics, which can be individually requested in interactive mode.
Statistics are not reported for the embedded port.
To collect these statistics, this command uses a special frame, the
hop-by-hop from the source switch to the destination switch. In order to prevent such a frame to loop
forever if an error occurs, a maximum number of hops for the frame to traverse is enforced. The hop count
includes all hops in the direct path from source to destination, and also all the hops in the reverse path, if
the tracing of the reverse path is requested. The default value for the maximum hop count is 25.
Basic statistics
Extended statistics
Reverse path
Source route
Basic statistics report variables that give an indication of ISL
congestion along the path. They include the following:
B/s Bytes per second received or transmitted; reports for
multiple time periods, displayed in parentheses.
Txcrdz The length of time in milliseconds that the port has been
prevented from transmitting frames due to lack of
buffer-to-buffer credit. It is an indication of downstream
congestion. This value reports for multiple time periods,
displayed in parentheses. Note that other commands,
such as portStatsShow, might express this value in
units other than milliseconds.
Extended statistics report variables of general interest. They include the
following:
F/s Frames per second received or transmitted; reports for
multiple time periods, displayed in parentheses.
Words Total number of 4-byte Fibre Channel words.
Frames Total number of frames.
Errors Total number of errors that might cause a frame not to
be received correctly. This includes CRC errors, bad
EOF errors, frame truncated errors, frame-too-short
errors, and encoding errors inside a frame.
In general, the path from port A on switch X to port B on switch Y
might be different from the path from port B to port A. The difference
could be in the links traversed between the same sequence of
switches, or the reverse path might even involve different switches. The
-r option allows the user to determine both routing and statistics
information for the reverse path, in addition to those for the direct
path.
The source route option allows the user to specify a sequence of
switches, ports, or areas that the
reach the destination. Therefore, the path might be different from the
one used by actual traffic.
The source route is expressed as a sequence of switches, a sequence
of output ports or areas, or a combination thereof. The next hop in the
source route is described by either the output port or area to be used
to reach the next hop, or the domain ID of the next hop.
frame, that is sent
pathInfo
frame has to traverse to
pathInfo
Fabric OS 5.x command reference guide 389