From: Danshtr (danshtr@gmail.com)
Date: Wed May 04 2005 - 07:49:15 GMT-3
So on a PIM_SP, which will route multicast traffic _from_ a shared
media network, and which will route multicast traffic _to_ a shared
media network.
Because on Doils Vol II both the PIM-forwarder and IGMP-querier are
used do determin who is sending packet _to_ the sahred medua network.
Is there an online cisoc documentation about that?
On 5/4/05, ccie2be <ccie2be@nyc.rr.com> wrote:
> Dan,
>
> On shared media, there are 3 functions where it must be decided which router
> will perform that function since you don't these functions performed more
> than once.
>
> These functions are:
>
> DR --- determines which rtr sends joins/prunes up the tree
>
> Querier -- determines which rtr queries hosts for group membership
>
> Forwarder -- determines which rtr forwards mcast traffic onto shared media
>
> The best source I've seen that describes how the selection process works is
> the Beau Williamson book, Developing IP Multicast Networks.
>
> The determination of which rtr will perform which function depends on a
> couple factors including which version of igmp is running and ip addressing.
>
> HTH, Tim
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Danshtr
> Sent: Wednesday, May 04, 2005 2:47 AM
> To: Cisco certification
> Subject: Multicast DR...
>
> Hello
>
> Reading through multicast documentation, they are mentioning DR and
> queriers which both are intended for deciding which router will
> forward multicast packets to the recievers.
>
> But i couldn't find how the routers, on a shared media, decide which
> one will forward the packets from the source.
>
> Does anyone here knows the answer? I am sure there is... because it works!
>
> --
> Best regards,
> Dan
>
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-- Best regards, Dan
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