From: boby2kusa@hotmail.com
Date: Mon Jul 07 2003 - 17:11:28 GMT-3
Your example scenario will not require a mulicast helper anymore, there is
only two routers and both are running multicat routing. IGMP join group
will cause both router's to send one another that there are members on each
other's ethernet interface and thus the multicast traffic will be forwarded
for each appropriate multicast group.
----- Original Message -----
From: "Ray Rossi" <niceguyray2002@yahoo.com>
To: <ccielab@groupstudy.com>
Sent: Monday, July 07, 2003 1:01 PM
Subject: IP Multicast helper map ( confused) ??
> Hello all
>
> I have been working on this IP Multicast helper-map scenario for sometime
and I'm not quite sure if I have the working solution correct? . Most of the
cisco CCO secnarios always seem to have a ( 1) way flow from Broadcast ( NON
Multicast compatible) domain to another broadcast domain. my secnario has
( 1) ethernet broadcast domain that is non Multicast aware and another
ethernet domain which is Multicast aware. I'm just not sure on the complete
configurations for this to work. example and my configs below
>
>
>
>
> E0------- R1 ---S0-------------------- S0 R2---------------------E0
>
>
>
> R1 and R2 run IP PIM Dense Mode
>
> R1 ethernet should join Group 225.0.0.5
>
> R2 ethernet should join group 225.0.0.2
>
>
>
> R1 has hosts on its Ethernet segment that do not understand Multicast. R2
ethernet Hosts understand Multicasr
>
>
>
> Here is my config Im not sure if this is correct because most
documentation uses only broadcast to broadcast scenarios for multicast
conversion. Is the configuration on R1 ok? And since R2 is a multicasr
capable router does it need any conversion on it? Any replies woul;d be
appreciated Thanks Configs listed below
>
>
>
> R1
>
>
>
> Ip multicast-routing
>
>
>
> Int s0/0
>
> Ip pim dense-mode
>
>
>
> Int Ethernet 0
>
> Ip pim dense-mode
>
> ip igmp join-group 225.0.0.5
>
> Ip Directed-broadcast
>
> Ip multicast helper-map broadcast 225.0.0.5 100
>
> Access-list 100 permit udp any any eq 3000
>
> Access-list 100 deny any any udp
>
>
>
> Ip forward-protocol udp 3000
>
>
>
>
>
> R2
>
>
>
> Ip multicast-routing
>
>
>
> Int s0/0
>
> Ip pim dense-mode
>
>
>
> Int Ethernet 0
>
> Ip pim dense-mode
>
> Ip igmp join-group 225.0.0.2
>
>
>
>
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