From: CCIEin2006 (ciscocciein2006@gmail.com)
Date: Thu Jan 19 2006 - 19:58:41 GMT-3
If the routers were not running multicast then how would they forward the
multicast traffic?
On 1/19/06, Faryar Zabihi (fzabihi) <fzabihi@cisco.com> wrote:
>
> If I need to send multicast traffic over routers that are not running
> multicast, would I use stub routing or a GRE tunnel?
> Would it matter if there is one or two routers in between?
>
> Faryar Zabihi
>
> Cisco Systems Inc.
> RTP, NC 27709
>
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> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Tim
> Sent: Thursday, January 19, 2006 5:15 PM
> To: 'CCIEin2006'; 'Cisco certification'
> Subject: RE: What good is multicast stub routing?
>
> This feature is a way of extending igmp function an extra hop.
>
> I can't say whether this feature has real world value but that doesn't
> matter with respect to the lab.
>
> It's not a hard feature to configure. Just make sure you know how to
> configure it and how to recognize the requirement for it in the lab and
> you'll be fine.
>
> Then move on to the other stuff.
>
> HTH, Tim
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> CCIEin2006
> Sent: Thursday, January 19, 2006 5:00 PM
> To: Cisco certification
> Subject: What good is multicast stub routing?
>
> According to Cisco:
>
> "Stub IP multicast routing allows stub sites to be configured quickly
> and easily for basic multicast connectivity, without the flooding of
> multicast packets and subsequent group pruning that occurs in dense
> mode, and without excessive administrative burden at the central site."
>
> I'm not sure what you're really saving here. If there is a multicast
> receiver at the stub site, the multicast packets still have to flow over
> the same link. And how much more administrative burden is it to
> configure pim on an interface than to configure a pim neighbor filter
> and igmp helper address?
>
> Can someone explain the utility of this feature?
>
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