Multicast how?

[Dave Taht]

I've been running pimd for months now. It's installed by default. Doesn't
work across interfaces (route).

Multicast as an idea is mostly dead.

If you can suggest a good test of pimd that is known to work and/or a known
working box with working sparse multicast, it would help.

An igmp proxy is available.

On Thu, Mar 29, 2012 at 6:40 PM, Francisco Obispo <fobispo at isc.org> wrote:

> I'm looking at the Juniper SOW, and I found myself with this:
>
>  a) Multicast demo using VLC.
>
>    i. No Multicast routing functionality will be
>       supported on the CPE. Only IGMP and MLD are
>       to be assumed.
>
>
> How are we going to get away with supporting Multicast Routing without the
> multicast routing functionality?,
>
> Are we planning to do this with IPv6? if not, then MLD is not needed.
>
> I'm envisioning running "pimd" on the CPE so we can join/leave multicast
> groups, and have the CPE join/leave groups to its upstream router (CGN),
> something like:
>
>
>
>         +----------+
>         |   CGN    |
>         +----------+
>              /\
>             /  \
>            /    \
>   +-------+      +-------+
>   | CPE 1 |      | CPE 2 |
>   +-------+      +-------+
>       |              ^
>       v              |
>  +----------+   +--------+
>  | Receiver |   | Sender |
>  +----------+   +--------+
>
>
> Another option is:
>
>         +----------+   +--------+
>         |   CGN    |<--| Sender |
>         +----------+   +--------+
>              /\
>             /  \
>            /    \
>   +-------+      +-------+
>   | CPE 1 |      | CPE 2 |
>   +-------+      +-------+
>       |              |
>       v              v
>  +----------+   +----------+
>  | Receiver |   | Receiver |
>  +----------+   +----------+
>
>
> In any case, it seems like we're going to need IGMPv2 functionality, with
> the CGN acting as RP and DR. I'm envisioning that this can be done in
> Linux, using multicast in dense mode, but it's been a long time since I've
> tried it, and if I remember correctly, I did it using Cisco equipment, set
> aside of the default router (they don't need to be the same).
>
> With VLC we can initiate a stream from the sender aimed at a private
> multicast IP: 239.0.0.0/24 and the receives should join the groups by
> telling their CPEs that they're interested in that particular IP (at least
> with IGMPv2-ASM), so they can join the group with their upstream router.
>
> Perhaps it would be interesting to see if we can support ICMPv3 by using
> SSM (Source Specific Multicast), but I don't think "pimd" supports that as
> of yet.. (would have to check).
>
> It seems like the main issues here are:
>
> 1) Get "pimd" to run in Linux-CPE
>
> 2) Get "pimd" running on the CGN receiving+sending
>   requests through the tunnel interfaces
>
> What do you all think?
>
>
> Francisco Obispo
> email: fobispo at isc.org
> Phone: +1 650 423 1374 || INOC-DBA *3557* NOC
> PGP KeyID = B38DB1BE
>
> _______________________________________________
> sdcpe-devel mailing list
> sdcpe-devel at lists.isc.org
> https://lists.isc.org/mailman/listinfo/sdcpe-devel
>



-- 
Dave Täht
SKYPE: davetaht
US Tel: 1-239-829-5608
http://www.bufferbloat.net
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