IPTV broken after network topology changes - Fixed

[pbill2003]

Hi,

I've been using udm-iptv for a couple of years to stream BT tv successfuly here in the UK. I swapped around some (Unifi) network switches & now IPTV is broken. No stream is possible. I have not updated any other soft or firmware, except udm-iptv. I have no VLANs. Some details:

UXG-Lite 4.0.20
Network Controller 9.2.87
udm-iptv 3.0.6

udm-iptv.conf

IPTV_WAN_INTERFACE="ppp0"
IPTV_WAN_VLAN="0"
IPTV_WAN_VLAN_INTERFACE="iptv"
IPTV_WAN_RANGES="224.0.0.0/4 109.159.247.0/24"
IPTV_WAN_DHCP="false"
IPTV_WAN_DHCP_OPTIONS="-O staticroutes -V IPTV_RG"
IPTV_WAN_STATIC_IP="10.20.30.1/24"
IPTV_LAN_INTERFACES="eth0"
IPTV_IGMPPROXY_PROGRAM="improxy"
IPTV_IGMPPROXY_DISABLE_QUICKLEAVE="false"
IPTV_IGMPPROXY_DEBUG="true"
IPTV_IGMPPROXY_IGMP_VERSION="2"

ifconfig

eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.247.1 netmask 255.255.255.0 broadcast 0.0.0.0
eth1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet6 fe80::9e05:d6ff:fe44:28b8 prefixlen 64 scopeid 0x20
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
ppp0: flags=4305<UP,POINTOPOINT,RUNNING,NOARP,MULTICAST> mtu 1492
inet 109.157.171.XXX netmask 255.255.255.255 destination 172.16.16.90
wgsrv1: flags=209<UP,POINTOPOINT,RUNNING,NOARP> mtu 1420
inet 192.168.3.1 netmask 255.255.255.248 destination 192.168.3.

igmpproxy.iptv.conf

improxy configuration for udm-iptv

igmp enable version 2
mld disable
quickleave enable
upstream ppp0
downstream eth0

udm-iptv diagnose
Please share the following output with the developers:
=== Configuration ===
WAN Interface: ppp0
WAN VLAN: 0 (dev iptv)
WAN DHCP: false (options "-O staticroutes -V IPTV_RG")
WAN Static IP: 10.20.30.1/24
WAN Ranges: 224.0.0.0/4 109.159.247.0/24
LAN Interfaces: eth0
IGMP Proxy quickleave disabled: false
IGMP Proxy debug: true
=== IP Link and Route ===
14: ppp0: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1492 qdisc fq_codel state UNKNOWN group default qlen 1000
inet 109.157.171.132 peer 172.16.16.90/32 scope global ppp0
valid_lft forever preferred_lft forever
inet 10.20.30.1/24 scope global ppp0
valid_lft forever preferred_lft forever
10.20.30.0/24 proto kernel scope link src 10.20.30.1
172.16.16.90 proto kernel scope link src 109.157.171.132
=== Service Logs ===
Aug 03 20:08:50 UXG-Lite udm-iptvd[42351]: DEBUG[mcast_recv_igmp@717]: k_get_rlif = 9 im_vif = 1
Aug 03 20:08:50 UXG-Lite udm-iptvd[42351]: DEBUG[imp_get_mfcc_ttls@168]: group 224.0.1.187 isn't interest in packet from 192.168.247.129
Aug 03 20:08:50 UXG-Lite udm-iptvd[42351]: DEBUG[main@653]: Data arrive
Aug 03 20:08:50 UXG-Lite udm-iptvd[42351]: DEBUG[mcast_recv_igmp@717]: k_get_rlif = 9 im_vif = 1
Aug 03 20:08:50 UXG-Lite udm-iptvd[42351]: DEBUG[imp_get_mfcc_ttls@168]: group 239.255.255.250 isn't interest in packet from 192.168.247.194
Aug 03 20:08:50 UXG-Lite udm-iptvd[42351]: DEBUG[main@653]: Data arrive
Aug 03 20:08:50 UXG-Lite udm-iptvd[42351]: DEBUG[mcast_recv_igmp@717]: k_get_rlif = 9 im_vif = 1
Aug 03 20:08:50 UXG-Lite udm-iptvd[42351]: DEBUG[imp_get_mfcc_ttls@168]: group 224.0.1.187 isn't interest in packet from 192.168.247.144
Aug 03 20:08:50 UXG-Lite udm-iptvd[42351]: DEBUG[main@653]: Data arrive
Aug 03 20:08:50 UXG-Lite udm-iptvd[42351]: DEBUG[mcast_recv_igmp@717]: k_get_rlif = 9 im_vif = 1

systemctl status udm-iptv
● udm-iptv.service - IPTV support for the UniFi Dream Machine
Loaded: loaded (/usr/lib/systemd/system/udm-iptv.service; enabled; vendor preset: enabled)
Active: active (running) since Sun 2025-08-03 19:21:23 BST; 52min ago
Main PID: 42351 (improxy)
Memory: 448.0K
CPU: 1.306s
CGroup: /system.slice/udm-iptv.service
├─42351 improxy -d 5 -c /var/run/igmpproxy.iptv.conf
├─42356 ip monitor address dev ppp0
└─42357 /bin/sh /usr/lib/udm-iptv/udm-iptvd start

Aug 03 20:12:56 UXG-Lite udm-iptvd[42351]: DEBUG[imp_get_mfcc_ttls@168]: group 239.254.127.63 isn't interest in packet from 192.168.247.147
Aug 03 20:12:56 UXG-Lite udm-iptvd[42351]: DEBUG[main@653]: Data arrive
Aug 03 20:12:56 UXG-Lite udm-iptvd[42351]: DEBUG[mcast_recv_igmp@717]: k_get_rlif = 9 im_vif = 1
Aug 03 20:12:56 UXG-Lite udm-iptvd[42351]: DEBUG[imp_get_mfcc_ttls@168]: group 239.255.255.250 isn't interest in packet from 192.168.247.194
Aug 03 20:12:56 UXG-Lite udm-iptvd[42351]: DEBUG[main@653]: Data arrive
Aug 03 20:12:56 UXG-Lite udm-iptvd[42351]: DEBUG[mcast_recv_igmp@717]: k_get_rlif = 9 im_vif = 1
Aug 03 20:12:56 UXG-Lite udm-iptvd[42351]: DEBUG[imp_get_mfcc_ttls@168]: group 224.0.1.187 isn't interest in packet from 192.168.247.129
Aug 03 20:12:56 UXG-Lite udm-iptvd[42351]: DEBUG[main@653]: Data arrive
Aug 03 20:12:56 UXG-Lite udm-iptvd[42351]: DEBUG[mcast_recv_igmp@717]: k_get_rlif = 9 im_vif = 1
Aug 03 20:12:56 UXG-Lite udm-iptvd[42351]: DEBUG[imp_get_mfcc_ttls@168]: group 239.255.255.250 isn't interest in packet from 192.168.247.194

IGMP is 'off' on the WAN side
I've tried IGMP 'off' * 'on' on the LAN side. No stream is possible with either setting

Probably a red-herring but I have a previous version of udm-iptv.conf which mentions different WAN & LAN interfaces. Which seems very strange. Perhaps I simply backed up the default settings rather than the working set.

Please help me debug my lack of BT tv stream. Thanks.

[pbill2003]

Fixed.

I created a VLAN for the EE-TV-Box-Pro. Ran udm-iptv reconfigure, picking the newly created VLAN. And it worked. I now have my stream.

cat /etc/udm-iptv.conf

IPTV_WAN_INTERFACE="eth1"
IPTV_WAN_VLAN="0"
IPTV_WAN_VLAN_INTERFACE="iptv"
IPTV_WAN_RANGES="224.0.0.0/4 109.159.247.0/24"
IPTV_WAN_DHCP="false"
IPTV_WAN_DHCP_OPTIONS="-O staticroutes -V IPTV_RG"
IPTV_WAN_STATIC_IP="10.20.30.1/24"
IPTV_LAN_INTERFACES="eth0.2"
#IPTV_IGMPPROXY_PROGRAM="improxy"
IPTV_IGMPPROXY_PROGRAM="improxy"
IPTV_IGMPPROXY_DISABLE_QUICKLEAVE="false"
IPTV_IGMPPROXY_DEBUG="true"
IPTV_IGMPPROXY_IGMP_VERSION="2"

Note the change to the WAN_INTERFACE.