From: steven richards (ccie_2005@hotmail.com)
Date: Sun Dec 11 2005 - 03:41:53 GMT-3
Thats what I thought I guess the Doc CD just has it incorrect. Thanks for
the input :)
>From: "Shaikh, Nasir" <Nasir.Shaikh@atosorigin.com>
>To: "steven richards"
><ccie_2005@hotmail.com>,<Lee.Donald@t-systems.co.uk>,<ccielab@groupstudy.com>
>Subject: RE: Using the IP Multicast Helper Map command
>Date: Wed, 7 Dec 2005 13:48:22 +0100
>
>When converting multicast to broadcast you have to use the broadcast
>address of the destination subnet.
>e.g if the interface address of the destination subnet is 172.16.1.0 /28
>and you are converting the multicast stream for 224.5.5.5 then your command
>would be:
>ip multicast helper-map 224.5.5.5 172.16.1.15 <with eventual access-list>
>
>remember to enable directed broadcast on the appropriate interfaces.
>
>regards
>Nash
>
>-----Original Message-----
>From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
>steven richards
>Sent: vrijdag 2 december 2005 23:50
>To: Lee.Donald@t-systems.co.uk; ccielab@groupstudy.com
>Subject: RE: Using the IP Multicast Helper Map command
>
>
> In that case the example on the doc cd shows 172.16.0.0 as being the
>destination address. But it also makes mention of if you want to broadcast
>to all hosts on the subnet use 172.16.0.255. So if my destination was on
>the
>172.16.0.X subnet would I use 172.16.0.255 or 172.16.0.0 ?
>
> Thanks,
>
>
> >From: Lee Donald <Lee.Donald@t-systems.co.uk>
> >To: 'steven richards' <ccie_2005@hotmail.com>, ccielab@groupstudy.com
> >Subject: RE: Using the IP Multicast Helper Map command
> >Date: Fri, 2 Dec 2005 11:10:51 -0000
> >
> >Steve,
> >
> >Multicast or broadcasts could not be sent to just one unicast address no.
> >
> >At the destination this multicast would be turned into a broadcast and
> >flooded out onto the local subnet, this would go to all hosts.
> >
> >HTH
> >
> >Lee.
> >
> >
> >
> >-----Original Message-----
> >From: steven richards [mailto:ccie_2005@hotmail.com]
> >Sent: Friday, December 02, 2005 10:57 AM
> >To: ccielab@groupstudy.com
> >Subject: Using the IP Multicast Helper Map command
> >
> > I am trying to understand how this command is used to convert from
> >broadcast to multicast and then back to broadcast to a single host
>address.
> >From this example from what I can see if I wanted to convert the
>multicast
> >to broadcast on the destination subnet I can use ip broadcast-address
> >172.16.0.255 and ip multicast helper-map 224.5.5.5 172.16.0.255 ? At
>least
> >I
> >
> >think ;) Would I just be able to send this to a single host on the
> >destination side ? Like if I just wanted to send this to 172.16.0.11
>would
> >I
> >
> >use ip broadcast-address 172.16.0.11 and ip multicast helper-map
>224.5.5.5
> >172.16.0.11 ?
> >
> > Thanks,
> >
> >
> >http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fipr
> >mc_r/mult/1rfmult2.htm#wp1089138
> >
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