Re: Multicast Design

The design Charles described there would be your best bet, if you have the
equipment available. Rendezvous points do not normally process much extra
traffic. Unfortunately there is a huge difference between what happens
normally, and what can happen if there is a configuration error (or if
someone wishes to cause break things). Setting the RP up on separate
devices helps to ensure that unicast communicaitons are not affected by
multicast problems.

Paul.

On Tue, Oct 6, 2009 at 6:19 PM, <Charles.Henson_at_regions.com> wrote:

> Rookie,
> Back in Vietnam, we had a bunch of DLSW peers that we needed to bring
> into the core. We didn't terminate them on our core 6509s (or 5500s) but
> instead had a pair of 7206s hanging directly off the core doing on the
> tunnel termination. I think that when the SRND says "core" that it is
> subject to interpretation. If you are worried about adding that overhead to
> your core hardware, then add new hardware as an extension to the core
> strictly for managing your MCast. Just a thought.
>
> Charles Henson
>
>
>
>
>
> From: ALL From_NJ <all.from.nj_at_gmail.com>
>
> To: Rookie Ccie <rookie.ccie_at_gmail.com>
>
> Cc: ccielab_at_groupstudy.com
>
> Date: 10/06/2009 12:03 PM
>
> Subject: Re: Multicast Design
>
>
>
>
>
>
> Afternoon Rookie Ccie,
>
> The thing about the core, is that it is normally fast, redundant, and has
> connectivity to all of the network. Do not place the RP somewhere that it
> is slow, or where redundancy and reachability is sketchy ...
>
> Not much burden at all to the core ...
>
> In the design guide, it looks like these are within the data path. For a
> medium size network, this is probably fine. For larger networks and where
> mcast is used extensively, you might have the RPs on dedicated routers
> attached to the core. These would be in the core still, fast, redundant,
> etc ...
>
> BTW - if you can say, what apps will you be running and to which clients?
> I
> am just curious ..., hope you do not mind me asking.
>
> HTH,
>
> Andrew
>
>
>
>
> On Tue, Oct 6, 2009 at 12:19 PM, Rookie Ccie <rookie.ccie_at_gmail.com>
> wrote:
>
> > Dear Experts,
> >
> > I'm planning to implement multicast on a medium sized campus network
> using
> > anycast RP. According to the Cisco Multicast SRND (
> > http://www.cisco.com/en/US/tech/tk828/tech_design_guides_list.html) the
> RP
> > should be placed at the core of the network. Will doing this add an extra
> > burden to the core? Please share your thoughts/experiences on this.
> >
> > Rgds
> >
> >
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>
> --
> Andrew Lee Lissitz
> all.from.nj_at_gmail.com
>
>
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Received on Tue Oct 06 2009 - 21:35:46 ART