ip igmp join-group

dtlokeedtlokee Posts: 2,381Member
Does anyone know how to force an interface that is not running PIM to re-register when you use the command "ip igmp join-group"? It will send a register message one time then stop sending them so the group will be pruned off in 3 minutes.
The only easy day was yesterday!

Comments

  • PStefanovPStefanov Posts: 79Member ■■□□□□□□□□
    Are you sure the router doesn't send a register message once every 60 seconds? I am not sure how the router sends a register message at first place without PIM being enabled on the interface. I will lab this up and see what happens.
  • dtlokeedtlokee Posts: 2,381Member
    PIM != IGMP, you can still join a IGMP group without PIM, but it does not re-register within the 3 minute timer so it will eventually prune the tree.
    The only easy day was yesterday!
  • mikeeomikeeo Posts: 74Member ■■□□□□□□□□
    Explain what you are trying to do.
  • PStefanovPStefanov Posts: 79Member ■■□□□□□□□□
    dtlokee wrote:
    PIM != IGMP, you can still join a IGMP group without PIM, but it does not re-register within the 3 minute timer so it will eventually prune the tree.

    I meant that if PIM is not enabled on an interface and if you receive an IGMP membership report or register using this command on that same interface, PIM will not send a join message toward the RP.

    Regarding you question, by "re-register" do you mean sending a join message, because the ip igmp join-group command makes the router send a join message? :o

    Please clarify your question, becuase I am a bit confused :)
  • dtlokeedtlokee Posts: 2,381Member
    I am using old routers as hosts in the lab without multicast routing or ip routing enabled. When you use a ip igmp join-group command the will send a igmp join message one time but that's it, they will not respond to the group queries and therefore will get pruned. No big deal, just a bit annyoing needing to re-issue the commands every 3 minutes
    The only easy day was yesterday!
  • networker050184networker050184 Posts: 11,962Mod Mod
    I know what you are talking about I was getting frustrated with this yesterday. Let us know if you figure it out.
    An expert is a man who has made all the mistakes which can be made.
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