E4200 hangs on multicast ?

Discussion in 'Tomato Firmware' started by Silencept, Mar 31, 2012.

  1. Silencept

    Silencept Serious Server Member


    I've set up my E4200 with toastmans build and i'm using it for IPTV but i encountered and issue when using multiple multicast sources and i dont seem to get over the problem.

    When i add the 4th muticast source simultaneously the router simply stops responding , everything on the LAN/WAN stops, devices on the lan cannot communicate with each other until i close one of the sources and then everything returns to normal , no reboot required , no message in the log , nothing.

    Each source has between 300k and 8 MB, and it doenst seem to be a resources issue because when im using 3 multicast sources the CPU Usage is 24.01% and the memory is 76% free..
    My ISP uses 2 vlan's and im actually running the IPTV in a separate VLAN with igmpproxy acting only on that vlan, internet traffic goes through a different vlan.
    Is there some limitation for the number of multicast sources? If 4 was the limit it would'nt be an issue because my ISP only grants 5 simultaneously!
    Can anyone help me to debug this issue?

    You can see how it works using this link:


    Note: i've tried with EMF enabled and disabled and it makes no difference.
  2. Silencept

    Silencept Serious Server Member

    Well , i have to do more testing . I still havent found if it's a switch issue ( due to losing all LAN connectivity ) or a resources issue.
    I've been testing the issue and in no time the processor or memory pass the 50% mark.
    Tomorrow i'll do some bandwith testing in the lan.
    ( Noticed today that the WIFI speed's with this N router running tomato are worst then the ISP provided router and its only B/G. Its wierd)
  3. Silencept

    Silencept Serious Server Member

    Well , i've tested the LAN and have no issue transfering big files through the network , LAN bandwith tests seem OK.
    It must be a routing issue but why does it just appear on the 3rd to the 4th multicast address added and why do i loose all LAN connectivity ?
    Is there any limitation to the igmpproxy ?
    How can i debug this without having to dump all multicast traffic?
    Note: The wireless issue i tested with a Laptop instead of the media center and it seems fine. Still the O!Play works three times faster with the ISP provided router even being a B/G one.
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