# IPTV / UDP multicast problem **URL:** \ **Category:** Installing and Using OpenWrt\ **Created:** [June 1, 2024, 10:20am UTC](https://forum.openwrt.org/t/iptv-udp-multicast-problem/199735 "2024-06-01T10:20:27Z")\ **Posts on this page:** 12\ **Page:** 1
**Author:** ![shdf](https://forum.openwrt.org/user_avatar/forum.openwrt.org/shdf/32/80311_2.png) [@shdf](https://forum.openwrt.org/u/shdf)\ **Post date:** [June 1, 2024, 10:20am UTC](https://forum.openwrt.org/t/iptv-udp-multicast-problem/199735/1 "2024-06-01T10:20:27Z")
Hello, i'm using a BPI-R3 with OpenWrt 23.05.2. I'm trying to view my ISP's iptv network stream in VLC. So I installed igmpproxy as explained [here](https://openwrt.org/docs/guide-user/network/wan/udp_multicast) Unfortunately it doesn't work. I was told that this string should work in VLC **rtp://233.136.0.202:7500/202** and it doesn't. So here is my configuration : **/etc/config/igmpproxy :** ```plaintext config igmpproxy option quickleave 1 option verbose 3 config phyint option network wan option zone wan option direction upstream list altnet 0.0.0.0/0 config phyint option network lan option zone lan option direction downstream ``` **/etc/config/network :** ```plaintext config device option name 'br-lan' option type 'bridge' list ports 'lan1' list ports 'lan2' list ports 'lan3' list ports 'lan4' list ports 'sfp2' config interface 'lan' option device 'br-lan' option igmp_snooping 1 option proto 'static' option ipaddr '192.168.1.1' option netmask '255.255.255.0' option ip6assign '60' ``` as you can see **option type 'bridge'** is not set in the **interface lan** but in the **device** , not sure sure if it changes something, but as the tutorial said to add the **option igmp\_snooping 1** in **lan** I've done as they say. also i can see this in the tutorial : > In older versions of igmpproxy it used to require firewall rules. However current versions insert the rules automatically during start-up of the igmpproxy daemon unfortunately, i don't see any rule added in the firewall...is it because I have firewall4 so nftables? Thank you for helping ---
**Author:** ![lleachii](https://forum.openwrt.org/letter_avatar/lleachii/32/5_5575768a8748004e209b776fc1b2916d.png) [@lleachii](https://forum.openwrt.org/u/lleachii)\ **Post date:** [June 1, 2024, 10:37am UTC](https://forum.openwrt.org/t/iptv-udp-multicast-problem/199735/2 "2024-06-01T10:37:31Z")
In my experience, VLC can indeed do multicast, but it doesn't make IGMP subscription requests needed for the igmpproxy. YMMV. Is your IPTV provider the one who told you the URI would work? I would suggest trying quickleave 0. ---
**Author:** ![shdf](https://forum.openwrt.org/user_avatar/forum.openwrt.org/shdf/32/80311_2.png) [@shdf](https://forum.openwrt.org/u/shdf)\ **Post date:** [June 1, 2024, 10:38am UTC](https://forum.openwrt.org/t/iptv-udp-multicast-problem/199735/3 "2024-06-01T10:38:28Z")
> [@lleachii](#): > > Is your IPTV provider the one who told you the URI would work? no, it's a guy with the same ISP as me and using debian as a router. from his home, that link works in VLC. And here is how he configured his igmpproxy ```plaintext quickleave phyint enp2s0 upstream ratelimit 0 threshold 1 altnet 77.128.0.0/9 altnet 224.0.0.0/8 phyint lan0 downstream ratelimit 0 threshold 1 altnet 192.168.1.2/24 phyint wlp4s0 disabled phyint lo disabled ``` ---
**Author:** ![shdf](https://forum.openwrt.org/user_avatar/forum.openwrt.org/shdf/32/80311_2.png) [@shdf](https://forum.openwrt.org/u/shdf)\ **Post date:** [June 1, 2024, 10:42am UTC](https://forum.openwrt.org/t/iptv-udp-multicast-problem/199735/4 "2024-06-01T10:42:11Z")
additionaly here is my **firewall rules** , i don't see anything new added in it since i installed igmpproxy : ![image](https://forum.openwrt.org/uploads/default/original/3X/4/2/42c4f0f9cd9c600fd7e46b04321ee55e73e7e6a1.png) Edit: i found where the rules landed in Luci, i can see them in STATUS\>\>FIREWALL ![image](https://forum.openwrt.org/uploads/default/original/3X/2/3/2359111d8d532d06d1f19d50654e392e5154e2df.png) ---
**Author:** ![shdf](https://forum.openwrt.org/user_avatar/forum.openwrt.org/shdf/32/80311_2.png) [@shdf](https://forum.openwrt.org/u/shdf)\ **Post date:** [June 1, 2024, 11:23am UTC](https://forum.openwrt.org/t/iptv-udp-multicast-problem/199735/5 "2024-06-01T11:23:03Z")
i can see this in my logs : **can't join group 233.136.0.202 on interface br-wan; Errno(98): Address in use** ```plaintext Sat Jun 1 13:23:52 2024 user.notice igmpproxy[7039]: RECV Membership query from 192.168.1.1 to 233.136.0.202 Sat Jun 1 13:23:52 2024 user.notice igmpproxy[7039]: RECV V2 member report from 192.168.1.10 to 233.136.0.202 Sat Jun 1 13:23:52 2024 user.debug igmpproxy[7039]: Should insert group 233.136.0.202 (from: 192.168.1.10) to route table. Vif Ix : 0 Sat Jun 1 13:23:52 2024 user.info igmpproxy[7039]: Updated route entry for 233.136.0.202 on VIF #0 Sat Jun 1 13:23:52 2024 user.debug igmpproxy[7039]: Joining group 233.136.0.202 upstream on IF address 192.168.20.1 Sat Jun 1 13:23:52 2024 user.notice igmpproxy[7039]: Joining group 233.136.0.202 on interface br-wan Sat Jun 1 13:23:52 2024 user.warn igmpproxy[7039]: can't join group 233.136.0.202 on interface br-wan; Errno(98): Address in use Sat Jun 1 13:23:52 2024 user.debug igmpproxy[7039]: Joining group 233.136.0.202 upstream on IF address 93.22.XX.XX Sat Jun 1 13:23:52 2024 user.notice igmpproxy[7039]: Joining group 233.136.0.202 on interface br-wan Sat Jun 1 13:23:52 2024 user.warn igmpproxy[7039]: can't join group 233.136.0.202 on interface br-wan; Errno(98): Address in use ``` ---
**Author:** ![shdf](https://forum.openwrt.org/user_avatar/forum.openwrt.org/shdf/32/80311_2.png) [@shdf](https://forum.openwrt.org/u/shdf)\ **Post date:** [June 1, 2024, 11:44am UTC](https://forum.openwrt.org/t/iptv-udp-multicast-problem/199735/6 "2024-06-01T11:44:26Z")
and here is a tcpdump ```plaintext root@OpenWrt:~# tcpdump -i br-wan igmp tcpdump: verbose output suppressed, use -v[v]... for full protocol decode listening on br-wan, link-type EN10MB (Ethernet), snapshot length 262144 bytes 13:42:14.472896 IP 192.168.20.1 > 233.136.0.202: igmp v2 report 233.136.0.202 13:42:15.812889 IP 192.168.20.1 > 233.32.36.161: igmp v2 report 233.32.36.161 13:42:18.109196 IP one.one.one.one > all-systems.mcast.net: igmp query v2 13:42:18.432900 IP 192.168.20.1 > 233.136.0.202: igmp v2 report 233.136.0.202 13:42:24.572968 IP 192.168.20.1 > 239.255.255.250: igmp v2 report 239.255.255.250 13:42:25.212889 IP 192.168.20.1 > 233.32.36.161: igmp v2 report 233.32.36.161 13:42:28.216225 IP 192.168.20.1 > all-routers.mcast.net: igmp leave 233.32.36.161 13:42:28.310807 IP one.one.one.one > 233.32.36.161: igmp query v2 [max resp time 4] [gaddr 233.32.36.161] 13:42:28.710590 IP one.one.one.one > 233.32.36.161: igmp query v2 [max resp time 4] [gaddr 233.32.36.161] 13:42:29.110694 IP one.one.one.one > 233.32.36.161: igmp query v2 [max resp time 4] [gaddr 233.32.36.161] 13:42:48.108512 IP one.one.one.one > all-systems.mcast.net: igmp query v2 13:42:57.212946 IP 192.168.20.1 > 239.255.255.250: igmp v2 report 239.255.255.250 13:42:57.212973 IP 192.168.20.1 > 233.136.0.202: igmp v2 report 233.136.0.202 13:43:18.104342 IP one.one.one.one > all-systems.mcast.net: igmp query v2 13:43:20.492911 IP 192.168.20.1 > 233.136.0.202: igmp v2 report 233.136.0.202 13:43:27.933058 IP 192.168.20.1 > 239.255.255.250: igmp v2 report 239.255.255.250 ``` ---
**Author:** ![lleachii](https://forum.openwrt.org/letter_avatar/lleachii/32/5_5575768a8748004e209b776fc1b2916d.png) [@lleachii](https://forum.openwrt.org/u/lleachii)\ **Post date:** [June 2, 2024, 1:27am UTC](https://forum.openwrt.org/t/iptv-udp-multicast-problem/199735/7 "2024-06-02T01:27:07Z")
> [@shdf](#): > > `wan` > [@shdf](#): > > `-i br-wan` Can we see the whole network config? Is there a reason WAN is placed in a bridge? ---
**Author:** ![shdf](https://forum.openwrt.org/user_avatar/forum.openwrt.org/shdf/32/80311_2.png) [@shdf](https://forum.openwrt.org/u/shdf)\ **Post date:** [June 2, 2024, 7:10am UTC](https://forum.openwrt.org/t/iptv-udp-multicast-problem/199735/8 "2024-06-02T07:10:18Z")
i have a BPI-R3 ![image](https://forum.openwrt.org/uploads/default/original/3X/2/b/2b454cfa352633e0af7819084b9f1e4642a73d0a.jpeg) ![Sans titre-1](https://forum.openwrt.org/uploads/default/original/3X/3/4/3478bd2a23adb8323ecec9c8888c4f6c98c71b56.jpeg) ETH1 is an SFP port and it is bridged with the WAN port which is RJ45. I have an ONU inserted in Eth1, to connect to my ISP. i made an interface called "onu" in order to manage it on the ip address 192.168.20.1 My network is on 192.168.1.0/24 My network config : ```plaintext config interface 'loopback' option device 'lo' option proto 'static' option ipaddr '127.0.0.1' option netmask '255.0.0.0' config globals 'globals' option ula_prefix 'fd3f:f494:0214::/48' option packet_steering '1' config device option name 'br-lan' option type 'bridge' list ports 'lan1' list ports 'lan2' list ports 'lan3' list ports 'lan4' list ports 'sfp2' config interface 'lan' option device 'br-lan' option proto 'static' option igmp_snooping 1 option ipaddr '192.168.1.1' option netmask '255.255.255.0' option ip6assign '60' config device option name 'br-wan' option type 'bridge' list ports 'eth1' list ports 'wan' config device option name 'eth1' option macaddr 'ce:a4:39:bd:8a:9a' config device option name 'wan' option macaddr 'ce:a4:39:bd:8a:9a' config interface 'wan' option device 'br-wan' option proto 'dhcp' option vendorid 'neufbox_BANANAPI-R3' option reqopts '1 3 6 12 14 15 17 28 40 42' option ipv6 '1' option peerdns '0' list dns '8.8.8.8' list dns '8.8.4.4' list dns '1.1.1.1' config interface 'wan6' option device 'br-wan' option proto 'dhcpv6' option peerdns '0' option reqaddress 'try' option defaultreqopts '0' option reqopts '23 25 26' option noclientfqdn '1' option noacceptreconfig '1' list dns '2001:4860:4860::8888' list dns '2001:4860:4860::8844' option reqprefix 'auto' config interface 'onu' option proto 'static' option device 'br-wan' option netmask '255.255.255.0' option ipaddr '192.168.20.1' ``` ---
**Author:** ![shdf](https://forum.openwrt.org/user_avatar/forum.openwrt.org/shdf/32/80311_2.png) [@shdf](https://forum.openwrt.org/u/shdf)\ **Post date:** [June 2, 2024, 10:27am UTC](https://forum.openwrt.org/t/iptv-udp-multicast-problem/199735/9 "2024-06-02T10:27:07Z")
I've just reinstalled my ISP's router and it works. so there's no problem on my PC either...it's in the BPI-R3 configuration that something's wrong... ![RTHnfiF1](https://forum.openwrt.org/uploads/default/original/3X/6/a/6a8daf9f35fcd73cc732fb3c1cc0ea425975d0a7.jpeg) ---
**Author:** ![shdf](https://forum.openwrt.org/user_avatar/forum.openwrt.org/shdf/32/80311_2.png) [@shdf](https://forum.openwrt.org/u/shdf)\ **Post date:** [June 2, 2024, 3:36pm UTC](https://forum.openwrt.org/t/iptv-udp-multicast-problem/199735/10 "2024-06-02T15:36:13Z")
i found the culprit : it's my ONU SFP... i removed it and used my ISP external ONT in the wan port (RJ45) and it worked immediatly. ---
**Author:** ![shdf](https://forum.openwrt.org/user_avatar/forum.openwrt.org/shdf/32/80311_2.png) [@shdf](https://forum.openwrt.org/u/shdf)\ **Post date:** [June 2, 2024, 4:39pm UTC](https://forum.openwrt.org/t/iptv-udp-multicast-problem/199735/11 "2024-06-02T16:39:22Z")
i just found this about what could be the reason : > [@Support MA5671A SFP GPON](https://forum.openwrt.org/t/support-ma5671a-sfp-gpon/48042/12): > > It apparently this stick doesn't forward IGMP, my IPTV doesn't work with this stick but works with another "more dumb" lantiq-based stick (Sercomm FGS202) which doesn't use Openwrt followed by this message : > [@Support MA5671A SFP GPON](https://forum.openwrt.org/t/support-ma5671a-sfp-gpon/48042/14): > > no, it's my stock image with the OCMI modded... I don't really want to flash random images because they might hardware damage the thing by pulling the wrong I/O pin the openwrt just doesn't forward IGMP traffic, normally they have igmpproxy package for that but it require a clear LAN/WAN interface meanwhile the GPON stick doesn't really expose the L2 WAN interface to the openwrt OS so I have no idea how to make it work ---
**Author:** ![shdf](https://forum.openwrt.org/user_avatar/forum.openwrt.org/shdf/32/80311_2.png) [@shdf](https://forum.openwrt.org/u/shdf)\ **Post date:** [March 19, 2025, 9:17pm UTC](https://forum.openwrt.org/t/iptv-udp-multicast-problem/199735/12 "2025-03-19T21:17:02Z")
FINALY !! we found how to fix the problem, based [on this issue on github](https://github.com/hack-gpon/hack-gpon.github.io/issues/323#issuecomment-1985476097) [fs.com](http://fs.com) said to run this command in the ONT : > fw\_setenv omci\_iop\_mask 8 it worked for us with a different value, 1. > fw\_setenv omci\_iop\_mask 1 in other words, without this command, multicast traffic doesn't arrive in the right vlan. Maybe @minhng99 in case you're still interested in the reason for this problem if you look at : **/etc/init.d/omcid.sh** then you'll see this code that manipulates this variable ```plaintext tmp=`fw_printenv omci_iop_mask 2>&- | cut -f2 -d=` if [-n "$tmp"]; then omci_iop_mask=$tmp else config_get omci_iop_mask "default" "omci_iop_mask" 0 fi ```