Pathinfo - Brocade Communications Systems A7533A - Brocade 4Gb SAN Switch Base Command Reference Manual

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pathInfo

pathInfo
Display routing and statistics information along a path covering multiple switches.
Synopsis pathinfo [domain [src_portnumber [dst_portnumber]] [-r]]
Description Use this command to display detailed routing information from a source port or area on the local
switch to a destination port or area on another switch. This routing information describes the exact
path that a user data stream takes to go from the source port to the destination port, including all
intermediate switches.
The command does not make any retry attempts if there is a timeout or failure. It might fail if a
switch along the path is busy: for instance, if a switch is performing a warm recovery or if a switch
along the path does not support this feature.
If the advanced performance tuning (APT) policy in effect on the intermediate switches is not a
port-based policy, subsequent data streams might not take the same path as displayed in the
pathInfo output. Refer to aptPolicy for more information on advanced performance tuning policies.
If you specify an inactive port or a path through a switch that does not have active routing tables to
the destination, this command displays the path that would be used if the ports were active. If you
specify a destination port that is not active, this command uses the embedded port as the
destination.
For bladed systems, the ingress and egress points are specified as port index. For nonbladed
systems, ingress and egress points are specified as ports. This agrees with the representation
displayed by the switchShow command.
In addition, pathInfo can provide, upon request, statistics on every traversed interswitch link (ISL)
that is part of the path. This feature is available in interactive mode only.
The routing and statistics information are provided by every switch along the path, based on the
current routing-tables information and statistics calculated continuously in real-time. Each switch
represents one hop of the total path.
Other options allow the collection of information on the reverse path, or on a user-selected path
(source route).
For each hop, the routing information output includes the following:
Hop
In Port
Domain ID
Name
Out Port
BW
Cost
382
The hop number. The local switch is hop 0.
The port or area from which the switch receives frames. For hop 0, this is
src_portnumber. For bladed systems, this is specified as the port index;
otherwise, it is the port number.
The domain ID of the switch.
The name of the switch.
The output port that the frames use to reach the next hop. For the last hop,
this is dst_portnumber. For bladed systems, this is specified as the area
number; otherwise, it is the port number.
The bandwidth of the output ISL, in Gbps. It does not apply to the embedded
port.
The cost of the output link used by the fabric-shortest path first (FSPF) routing
protocol. Only applicable if the output link is currently recognized by FSPF.
Fabric OS Command Reference
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