igmpproxy(8)igmpproxy(8)NAMEigmpproxy - Multicast router utilizing IGMP forwarding
SYNOPSISigmpproxy [-h] [-d] [-v [-v]] config-file
DESCRIPTIONigmpproxy is a simple multicast routing daemon which uses IGMP forward‐
ing 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.
OPTIONS-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.
-d Output log messages to STDERR instead of to syslog(3).
LIMITS
The current version compiles and runs fine with the Linux kernel ver‐
sion 2.4. The known limits are:
Multicast routes: more then 200
Multicast group membership: max. 20
FILES
/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).
SEE ALSOigmpproxy.conf(5), mrouted, pimd, smcroute
BUGS
Currently none (but there probably will be :-/ )
AUTHOR
Originally written by Johnny Egeland <johnny@rlo.org>.
igmpproxy 0.1igmpproxy(8)