TCP/IP (Parallel Library) Configuration and Management Manual

Tracer Utility
HP NonStop TCP/IP (Parallel Library) Configuration and Management Manual—522271-006
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Running the Tracer Utility from a Terminal
[ -n ]
specifies that the address of each gateway be printed numerically rather than both
symbolically and numerically. Thus, only the IP address, rather than the address
and gateway name, appears in the output. Specifying -n avoids having the Tracer
Utility do a time-consuming address-to-name lookup. HP recommends use of this
option.
[ -p port-num ]
specifies the base UDP port number used in probes. If you do not specify this
option, the Tracer utility uses the default value 33434 for port-num.
The UDP port number, whether it is the default number or a number you specify
through this option, should not be an actual port range on the remote host to which
the probe is destined. The remote host should not process the probe packet.
Instead, the remote host should send back a ICMP_UNREACH_PORT message to
conclude route tracing. The Tracer Utility informs you of this occurrence by printing
an exclamation point either on your screen or in the disk file you specified.
Specifying the -p option is useful when the default value (33434) does specify an
actual port range on the destination host. In such cases, -p option allows you to
specify an unused port range.
[ -q nqueries ]
specifies the number of probes, or queries, for each TTL. If you do not specify this
option, the Tracer Utility uses the default value 3 for nqueries.
[-r ]
specifies that the routing tables be bypassed and that probes should be sent
directly to a host on an attached network. If the host is not on a directly attached
network, an error message is returned.
You can use this option to send an ICMP echo request to a local host through an
interface that does not involve routing.
[ -s src-addr ]
specifies that the IP address in src-add should be used as the source address in
outgoing probe packets. The address specified in src-add must be an IP number
rather than a host name.
On NonStop systems that have more than one IP address, use the -s option to
change the source address to an address that differs from the IP address of the
interface on which the probe packet is sent.
The IP address you specify for src-addr must be one of the IP addresses of the
NonStop system on which you launch the trace. Otherwise, an error message is
returned, and the Tracer Utility does not send any probes.