From: Cisco Net (network.cisco@gmail.com)
Date: Sat Oct 16 2004 - 15:55:10 GMT-3
Hi
Thank you
Regarding the first question,
When i have 2 paths how router is decided to go through the Tunnel
instead of serial/frame ckt is still not clear (both serial as well as
tunnel interfaces are enabled for multicast and pim dense mode).
Especially since the tunnel IPs are not included in the IGP.
I am not trying to do the load balance. May be becasue the frame is
going through the multipoint interfaces (hub spoke) and hence it can
not process further. Soi am seeing only through the tunnel.
Or may be i am missing something else.
Thank you
Regards
Cert
On Sat, 16 Oct 2004 20:38:04 +0200, jean.paul.baaklini@accenture.com
<jean.paul.baaklini@accenture.com> wrote:
> Hi,
>
> 1) no static mroutes don't influence the routing decisions like an IGP
> does, instead it makes the router aware of which interface it should be
> expecting multicast traffic on. I don't think it matters to know the
> path selection process, just use mroutes to avoid RPF failures.
>
> You want to use the tunnel in order to load balance your multicast
> traffic.
>
> 2) you're right here. Use sparse-dense-mode. Although the command
> returns a warning message, it is accepted and processed.
>
> Cheers,
> JP
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Cisco Net
> Sent: 16 October 2004 00:28
> To: ccielab@groupstudy.com
> Subject: MCAST questions
>
> Hi
> Please verify these questions,
> 1) If there are 2 paths between 2 routers and if multicast with
> pim/dense/sparse
> mode is enabled, what is the decision criterial to select the path.
> Does ip mroute static command influence on deciding the path ?
> (I know that ip mroute is used for influencing the rpf check but not
> sure about
> the actual traffic).
>
> I have 2 paths between R1 and R3, through frame-relay serial and GRE
> Tunnel.
> Now Tunnel IPs are not part of any IGP and i still see that remote
> router
> is joining through the tunnel.
>
> I am wonderig what is the path decision critira for the mcast traffic
> to pick the tunnel interface ?
>
> 2) My requirement says to enable a multicast mode in which if sparse
> fail, dense should kick in and i think the answer is pim sparse-dense
> mode.
> Also sice this setup is a multipoint frame connectivity and i hv to
> enable ip pim
> nbma mode.
>
> The complexity here is that according to the documentation pim nbma
> mode should be enabled only when the type is "sparse" mode. But if the
> type i configure as sparse mode, i will not meet the original
> requirment (if sparse fails dense mode should kick in)
>
> Any advice please
> Regards
> Cert
>
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