Name
traceroute
Synopsis
traceroute [options
]host
[packetsize
]
Traces the route taken by packets to reach network host.
traceroute
attempts tracing by launching UDP probe
packets with a small TTL (time to live), then listening for an ICMP
“time exceeded” reply from a
gateway. host
is the destination hostname
or the IP number of host to reach.
packetsize
is the
packet size in bytes of the probe datagram. Default is 38 bytes.
Options
-
-d
Turn on socket-level debugging.
-
-m
max_ttl
Set maximum time-to-live used in outgoing probe packets to
max-ttl
hops. Default is 30 hops.-
-n
Show numerical addresses; don’t look up hostnames. (Useful if DNS is not functioning properly.)
-
-p
port
Set base UDP port number used for probe packets to
port
. Default is (decimal) 33434.-
-q
n
Set number of probe packets for each time-to-live setting to the value
n
. Default is 3.-
-r
Bypass normal routing tables and send directly to a host on an attached network.
-
-s
src_addr
Use
src_addr
-
-t
tos
Set the type-of-service in probe packets to
tos
(default 0). The value must be a decimal integer in the range 0 to 255.-
-v
Verbose; received ICMP packets (other than
TIME_EXCEEDED
andPORT_UNREACHABLE
) will be listed.-
-w
wait
Set time to wait for a response to an outgoing probe packet to
wait
seconds (default is three seconds).
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