This is the command sc_tracediff that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
PROGRAM:
NAME
sc_tracediff — display traceroute paths where the path has changed.
SYNOPSIS
sc_tracediff [-a] [-m method] [-n] file1.warts file2.warts
DESCRIPTION
The sc_tracediff utility displays pairs of traceroutes to a destination where the path has
changed. It takes two warts files as input and displays paths where a hop differs by its
address. The options are as follows:
-a dump all traceroute pairs regardless of whether they have changed.
-m method
specifies the method used to match pairs of traceroutes together. If dst is
specified, traceroutes are matched if the destination IP address of both traces are
the same. If userid is specified, traceroutes are matched if the userid field of
both traces are the same. If dstuserid is specified, traceroutes are matched if the
destination IP address and userid fields are the same. By default, the destination
IP address is used.
-n names should be reported instead of IP addresses, where possible.
sc_tracediff can be useful in network monitoring to identify when a forward IP path has
changed. In this scenario, it is recommended that Paris traceroute is used with the same
UDP source and destination ports for each execution of scamper so that only paths that have
changed are identified, not merely alternate paths visible due to per-flow load-balancing.
By default scamper uses a source port based on the process ID, which will change with each
execution of scamper.
EXAMPLES
The command:
scamper -O warts -o file1.warts -c 'trace -P udp-paris -s 31337' -f list.txt
collects the forward IP paths towards a set of IP addresses found in list.txt using 31337 as
the UDP source port value. If the above command is adjusted to subsequently collect
file2.warts, then we can identify paths that have subsequently changed with the command:
sc_tracediff file1.warts file2.warts
If Paris traceroute with ICMP probes is preferred, then the following invocation of scamper
is appropriate:
scamper -O warts -o file1.warts -c 'trace -P icmp-paris -d 31337' -f list.txt
In this case, scamper uses 31337 as the ICMP checksum value in each probe.
Use sc_tracediff online using onworks.net services
