NAME

vdump - dump information traversing a uml_switch to standard output

SYNOPSIS

vdump VIRTUAL-COLLISION-DOMAIN-ID

DESCRIPTION

The vdump command starts uml_dump, which connect to a specific instance of uml_switch then dump in CAP format the packets received by this virtual switch to standard output. This, sniffers like tcpdump or wireshark can be used to print packet information.

The argument is the virtual collision domain id defined in lab.conf

OPTIONS

The following generic options are supported.

-h

--help

Show usage information.

--version

Print information about the installed Netkit release and the host kernel version and exit. If ''<unavailable>'' is printed instead of a version number, then the corresponding information could not be retrieved (for example because a non-standard Netkit kernel or filesystem is being used).

ENVIRONMENT VARIABLES

All Netkit commands require that the NETKIT_HOME variable contains the name of the directory Netkit is installed in.

Apart from this, vdump supports no other environment variables.

EXAMPLES

The following is an example using vdump to dump packets from the virtual collision domain id "A" and connect it to tcpdump for human readable description of the packets.

vdump A | tcpdump -r - -S 1500 -U

If you prefer the graphical GUI wireshark:

vdump A | wireshark -i - -k

SEE ALSO

vclean(1), vconfig(1), vcrash(1), vhalt(1), vstart(1).

AUTHOR

vlist script: Julien Iguchi-Cartigny, Jean-Baptiste Machemie and Benoit Bitarelle.
This man page: Julien Iguchi-Cartigny.

REPORTING BUGS

Report bugs to the Github issues page: https://github.com/netkit-jh/netkit-jh-build/issues

Please follow the recommended templates when reporting bugs.