udp multicast через vlan

4: eth0.924@eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP
    inet 192.168.10.15/24 scope global eth0.924
       valid_lft forever preferred_lft forever

$ ip r show 233.0.0.0/8
multicast 233.0.0.0/8 dev eth0.924  scope link  metric 1

$ cat /proc/sys/net/ipv4/conf/eth0.924/rp_filter
0
$ cat /proc/sys/net/ipv4/conf/eth0.924/force_igmp_version
0
$ cat /proc/sys/net/ipv4/ip_forward
1

$ sudo iptables -nvL
[sudo] password for turbid:
Chain INPUT (policy ACCEPT 766K packets, 49M bytes)
 pkts bytes target     prot opt in     out     source               destination
    8   256 ACCEPT     all  --  *      *       0.0.0.0/0            233.0.0.0/8

Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination

Chain OUTPUT (policy ACCEPT 959K packets, 1506M bytes)
 pkts bytes target     prot opt in     out     source               destination

$ vlc --miface=eth0.924 udp://233.1.1.1:1234 -vvv

$ sudo tcpdump -i eth0.924 -n udp and port 1234