Multicast Routing
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Nutzbare Daemons
- pimd - multicast routing daemon (PIMv2)
- smcroute - static multicast router daemon
- mrouted
pimd HowTo
- Stelle sicher, das der Kernel die folgenden Optionen aktiviert hat. Siehe /boot/config-$(uname -r)
CONFIG_IP_MULTICAST CONFIG_IP_PIMSM_V2 CONFIG_IP_MROUTE
sowie die NETLINK-bezogenen Optionen
- Wenn nicht, aktiviere sie, recompile den Kernel und starte neu
- Aktiviere IP forwarding
echo 1 >/proc/sys/net/ipv4/ip_forwarding
- vorausgesetzt die Geräte sind eth0 und eth1, füge Multicast zur Routingtabelle hinzu
route add -net 224.0.0.0/4 dev eth0 route add -net 224.0.0.0/4 dev eth1
- starte den pimd daemon
- Test ob multicast forward aktiv ist
cat /proc/sys/net/ipv4/conf/all/mc_forwarding # = 1
smcroute HowTo
smcroute < options > < commands >
options
-d - start daemon -v - verbose output
commands - common
-h - print help -k - kill daemon
commands - multicast routing related
-a <InputIntf> <OriginIpAdr> <McGroupAdr> <OutputIntf> [<OutputIntf>] ... - add route -r <InputIntf> <OriginIpAdr> <McGroupAdr> - remove route
commands - multicast signaling related
-j <InputIntf> <McGroupAdr> - join MC group -l <InputIntf> <McGroupAdr> - leave MC group
igmpproxy
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).
mrouted
Compiling
- Zuerst enfernen wir ein paar Compiler Parameter
# Respect user CFLAGS, remove upstream optimisation and -Werror
sed -i Makefile -e '/^CFLAGS/{s|[[:space:]]=| +=|g;s|-O2||g;s|-Werror||g}' || return 1
unter Debian Systemen
make build-deb
sonstige
make make install
Links
- Linux Documentation Project: Multicast over TCP/IP HOWTO
- Step By Step Setup Multicast Server Using Ubuntu 8.04
- http://ubuntuforums.org/showthread.php?t=1405360
- pimd Manpage - PIMv2-SM multicast routing daemon
- http://forum.soft32.com/linux2/Howto-enable-multicast-forwarding-Linux-ftopict31853.html
- http://www.cschill.de/smcroute/
- SMC router how-to
- SMCRoute Manpage
- igmpproxy
- http://vmlinux.org/jocke/pimd.shtml
- http://fengnet.com/book/ICUNA/ch14lev1sec6.html