igmpproxy - Multicast router utilizing IGMP forwarding

       Originally written by Johnny Egeland <johnny@rlo.org>.

igmpproxy 0.3                                                                                       igmpproxy(8)

       Currently none (but there probably will be :-/ )

igmpproxy  is a simple multicast routing daemon which uses IGMP forwarding to dynamically route multicast
       traffic. Routing is done by defining an "upstream"  interface  on  which  the  daemon  act  as  a  normal
       Multicast  client,  and  one  or  more  "downstream"  interfaces  that  serves clients on the destination
       networks. This is useful in situations where other dynamic multicast routers (like 'mrouted'  or  'pimd')
       cannot be used.

       Since  igmpproxy  only  uses  IGMP  signalling,  the daemon is only suited for situations where multicast
       traffic comes from only one neighbouring network.   In  more  advanced  cases,  'mrouted'  or  'pimd'  is
       probably more suited.  The daemon is not designed for cascading, and probably won't scale very well.

       Currently only IGMPv1 and v2 is supported on downstream interfaces.  On the upstream interface the kernel
       IGMP client implementation is used, and supported IGMP versions is therefore limited to that supported by
       the kernel.

/proc/net/ip_mr_cache
              - contains the active multicast routes

       /proc/net/ip_mr_vif
              - contains the 'virtual' interfaces used by the active multicast routing daemon

       /proc/sys/net/ipv4/conf/<ifname>/force_igmp_version
              -  can  be set to control what IGMP version the kernel should use on the upstream interface.  Ex.:
              'echo 2 > /proc/sys/net/ipv4/conf/eth0/force_igmp_version' will force the kernel to use IGMPv2  on
              eth0 (provided this is the upstream interface).

       The current version compiles and runs fine with the Linux kernel version 2.4. The known limits are:

       Multicastroutes: more then 200

       Multicastgroupmembership: max. 20

       igmpproxy - Multicast router utilizing IGMP forwarding

       -h     Display help.

       -v     Verbose logging. Set logging level to INFO instead of WARNING used by default.

       -vv    More verbose logging. Set logging level to DEBUG.

       -n     Do not run as a daemon.

       -d     Output log messages to STDERR instead of to syslog(3).  Implies -n.

igmpproxy.conf(5), mrouted,pimd,smcroute

igmpproxy[-h][-n][-d][-v[-v]]config-file