RTMON(8)                                                 RTMON(8)

     NAME
          rtmon - listens to and monitors RTnetlink

     SYNOPSIS
          rtmon [ options ] file FILE [ all | LISTofOBJECTS ]

     DESCRIPTION
          This manual page documents briefly the rtmon command.

          rtmon listens on netlink socket and monitors routing table
          changes.

          rtmon can be started before the first network configuration
          command is issued.  For example if you insert:

          rtmon file /var/log/rtmon.log

          in a startup script, you will be able to view the full his-
          tory later.  Certainly, it is possible to start rtmon at any
          time. It prepends the history with the state snapshot dumped
          at the moment of starting.

     OPTIONS
          rtmon supports the following options:

          -Version
               Print version and exit.

          help Show summary of options.

          file FILE [ all | LISTofOBJECTS
               Log output to FILE. LISTofOBJECTS is the list of object
               types that we want to monitor. It may contain 'link',
               'address', 'route' and 'all'. 'link' specifies the net-
               work device, 'address' the protocol (IP or IPv6)
               address on a device, 'route' the routing table entry
               and 'all' does what the name says.

          -family [ inet | inet6 |
               Specify protocol family. 'inet' is IPv4, 'inet6' is
               IPv6, 'link' means that no networking protocol is
               involved and 'help' prints usage information.

          -4   Use IPv4. Shortcut for -family inet.

          -6   Use IPv6. Shortcut for -family inet6.

          -0   Use a special family identifier meaning that no net-
               working protocol is involved. Shortcut for -family

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     RTMON(8)                                                 RTMON(8)

               link.

     USAGE EXAMPLES
          # rtmon file /var/log/rtmon.log
               Log to file /var/log/rtmon.log, then run:

          # ip monitor file /var/log/rtmon.log
               to display logged output from file.

     SEE ALSO
          ip(8)

     AUTHOR
          rtmon was written by Alexey Kuznetsov
          <kuznet@ms2.inr.ac.ru>.

          This manual page was written by Michael Prokop
          <mika@grml.org>, for the Debian project (but may be used by
          others).

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