From: Andre Serrao (andreserrao@gmail.com)
Date: Thu Dec 21 2006 - 13:16:53 ART
So, I guess I got that question wrong!!
Thanks for your feedback, Scott.
Andre
On 12/19/06, Scott Morris <swm@emanon.com> wrote:
>
> SSM specifically requires an RP though. And the difference there is that
> you will join not only a group, but join a group FROM a specific source.
>
> So I would think that would violate the idea of "do not use any RP". :)
>
> If it were more specific in the wording about "do not use any static RP
> assignments", then I might say we could use AutoRP or BSR and still meet
> the
> requirements, but as setup, I think the dense-mode should win.
>
> With SSM, remember that we do indeed have some choices, but those are
> purely
> choices from how the client-side of things works. IGMPv3, v3lite or URD
> (URL Resource Directory). But once we hit PIM, we all need to know how to
> do source-specific requests.
>
> HTH,
>
>
> Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE
> #153, CISSP, et al.
> CCSI/JNCI-M/JNCI-J
> IPExpert VP - Curriculum Development
> IPExpert Sr. Technical Instructor
> smorris@ipexpert.com
> http://www.ipexpert.com
>
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Andre Serrao
> Sent: Tuesday, December 19, 2006 6:18 PM
> To: Cisco certification
> Subject: Re: Multicast Question: SSM vs Dense Mode?
>
> Scott and GS,
>
> This scenario has two routers (R1,R4), interconnected via GRE tunnel
> (since
> there are 2-3 other routers in between them). Only these two routers have
> multicast enabled. We want a server in the same vlan as Router 1's fa0/0
> to
> ping group 227.69.53.7 (R4's fa0/0 has ip igmp join-group 227.69.53.7).
>
> So, it's a pretty simple scenario (pt-to-pt) link between 2 multicast
> routers. Like I mentioned in the previous message, it states "do not use
> any
> RP assignments". There is no explicit indication about the pim mode. So,
> is
> this a situation that could be solved by using SSM?
>
> I wasn't so much concerned with this scenario in particular, but mostly
> with
> the application of SSM in general.
>
> Thanks in advance for your help,
> Andre
>
>
> On 12/19/06, Andre Serrao <andreserrao@gmail.com> wrote:
> >
> > If a question states "do not use any RP assignments" (IEWB Lab17), is
> > it OK to use SSM or we need to use dense mode?
> >
> > I made it work with SSM and have not used Auto-RP, BSR, and static
> > routing, yet the answer says it should be dense mode.
> >
> > If I can't use SSM here, could you please tell a situation in which
> > SSM is the applicable solution? I haven't done any lab yet that uses it.
> >
> > Thanks,
> > Andre
>
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