urgent IGMP proxy

RouterOS Forwarding Protocols
1

I have 50 Encoder HDMI to IP , the LAN 10/100 not 1G , if I put all in one switch its make 100Mb and overloaded the 10/100 LAN.

I solve it with IGMP proxy , using CRS125-24G-15-RM , ether 24- ether3 master port ether2 , and ether1 output to other encoder (output here 40Mb)

the encoder networks 192.168.10.0/24 and all are broad cast into 238.0.0.1 with ports 1003-1024



/routing igmp-proxy interface
add alternative-subnets=0.0.0.0/4 interface=ether2 upstream=yes
add
/routing igmp-proxy mfc
add downstream-interfaces=ether1 group=238.0.0.1 source=192.168.10.18 upstream-interface=ether2
add downstream-interfaces=ether1 group=238.0.0.1 source=192.168.10.15 upstream-interface=ether2
add downstream-interfaces=ether1 group=238.0.0.1 source=192.168.10.16 upstream-interface=ether2
add downstream-interfaces=ether1 group=238.0.0.1 source=192.168.10.17 upstream-interface=ether2
add downstream-interfaces=ether1 group=238.0.0.1 source=192.168.10.19 upstream-interface=ether2
add downstream-interfaces=ether1 group=238.0.0.1 source=192.168.10.20 upstream-interface=ether2
add downstream-interfaces=ether1 group=238.0.0.1 source=192.168.10.21 upstream-interface=ether2
add downstream-interfaces=ether1 group=238.0.0.1 source=192.168.10.22 upstream-interface=ether2
add downstream-interfaces=ether1 group=238.0.0.1 source=192.168.10.23 upstream-interface=ether2
add downstream-interfaces=ether1 group=238.0.0.1 source=192.168.10.24 upstream-interface=ether2




/routing igmp-proxy interface> print 
Flags: X - disabled, I - inactive, D - dynamic, U - upstream 
 #    INTERFACE                                                                                                                                                              THRESHOLD
 0  U ether2                                                                                                                                                                         1
 1    all                                                                                                                                                                            1
 2 D  ether1



my issue now I got pixlate when this message appear igmp-proxy,debug ignoring request from unknown address



see the log for IGMP

12:08:07 igmp-proxy,debug ignoring IGMP packet: the group 238.0.0.1 has static config 
12:08:35 igmp-proxy,debug ignoring request from unknown address  - "alternative-subnets" configuration may be required: 
12:08:35 igmp-proxy,debug   source=169.254.14.117 
12:08:35 igmp-proxy,debug   destination=239.255.255.250 
12:08:48 igmp-proxy,debug ignoring request from unknown address  - "alternative-subnets" configuration may be required: 
12:08:48 igmp-proxy,debug   source=169.254.14.117 
12:08:48 igmp-proxy,debug   destination=239.255.255.250 
12:08:51 system,info,account user admin logged in via local 
12:09:00 igmp-proxy,debug ignoring request from unknown address  - "alternative-subnets" configuration may be required: 
12:09:00 igmp-proxy,debug   source=169.254.14.117 
12:09:00 igmp-proxy,debug   destination=239.255.255.250
2

Googling the multicast group 239.255.255.250 says that this is SSDP traffic.
The source IP in the log is 169.254.14.117 which is a special link-local-only subnet.
(like fe80::/16 in ipv6)
This is the range that Windows defaults to when DHCP fails, and UPnP devices can use this network all day long to talk to each other on a network that doesn’t even have IP configured anywhere…

Some box is trying to find out what other dynamic boxes are around for things like meida shares and print servers, or routers, etc. You could do a packet sniff to find what MAC address is sending these packets and track it down that way.