Name
traceroute
Synopsis
traceroute [options
]host
[packetsize
]
Traces 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; do not 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 as the IP address that will serve as the source address in outgoing probe packets.
-
-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 and PORT_ UNREACHABLE) will be listed.
-
-w
wait
Set time to wait for a response to an outgoing probe packet to wait seconds (default is 3 seconds).
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