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basic multicast test over one MX router

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  • 1.  basic multicast test over one MX router

    Posted 12-18-2018 01:42

    Hi All,

     

    I am trying to test multicast setup over an MX480 router. i have both reciever and source connected to 2 interfaces of the same MX. this is the physical setup

     

    Source...>EX2300.....>>Brocade_switch---->ge-1/0/0/20(MX)ge-1/1/9.20--->EX2200----Receiver

     

    MX setup

    re0# show protocols pim
    interface ge-1/0/0.20 {
        mode dense;
    }
    re0# show protocols igmp
    interface ge-1/1/9.20;

    re0# run show igmp group 238.5.5.1 detail
    Interface: ge-1/1/9.20, Groups: 2
    Group: 238.5.5.1
    Group mode: Exclude
    Source: 0.0.0.0
    Source timeout: 0
    Last reported by: 10.2.2.2
    Group timeout: 228 Type: Dynamic
    Output interface: ge-1/1/9.20

    ..............................................................................................

    -re0# run show multicast route group 238.5.5.1
    Instance: master Family: INET

    Group: 238.5.5.1
    Source: 10.5.5.2/32
    Upstream interface: ge-1/1/7.20


     

    All switches have IGMP-SNOOP disabled and i am assuming they will flood the muliticast frame .

     

    what could i be doing wromg.. with this setup, i cant stream from the reciever.. 

    anything i need to allow through the RE-PROTECT Lo0 filter ??

     



  • 2.  RE: basic multicast test over one MX router

    Posted 12-18-2018 03:32

    Hello,


    @lish wrote:

     

     

    what could i be doing wromg.. with this setup, i cant stream from the reciever.. 

     



    Please check IP TTL in the multicast packets, popular freeware programs like VLC have default multicast IP TTL ==1 .

     


    @lish wrote:

     

    anything i need to allow through the RE-PROTECT Lo0 filter ??

     


     Well, for this exact setup - only IGMP.

    But please enable logging in the last "Deny All" term and see what You have been missing.

    HTH

    Thx

    Alex



  • 3.  RE: basic multicast test over one MX router
    Best Answer

    Posted 12-18-2018 06:02

    Hi Alex,

    Not sure why, but if i add the interface facing the switch where the reciever is connected to under PIM, the stream works. 

     

    So now at the MX level, i have both the upstream interface and downstream interface under PIM . also the same downstream interface, i have it added under IGMP.

     

     

    Regards,

    lish.