Re: IP multicast - per-PIM neighbour QoS

Dale,

There is a handy feature in DMVPN called Per-Tunnel QoS which does exactly
what you are looking for.

http://www.cisco.com/en/US/docs/ios/sec_secure_connectivity/configuration/guide/sec_per_tunnel_qos.html

The spoke signals an attribute via NHRP back to the hub which in turn
applies a particular service-policy outbound toward the spoke. This allows
for different classes of service for different DMVPN neighbors through a
single tunnel interface.

Steve

On Wed, Mar 24, 2010 at 12:26 AM, Dale Shaw <dale.shaw_at_gmail.com> wrote:

> I've given this a lot less thinking time than it deserves, but I
> thought I'd put the query to the group anyway.
>
> Assume I have a tunnel interface running in PIM NBMA mode. For
> argument's sake, let's say I have 10 neighbours, all of which are
> receiving traffic for a single, specific multicast group
> (239.195.0.1). At the transport layer, it's UDP on port 5456.
>
> I want to mark traffic (using DSCP bits) destined for one specific PIM
> neighbour differently than the others.
>
> I don't know of a way to achieve this, and I've almost convinced
> myself it's impossible, but I'm ready to be clued-batted about a nerd
> knob I didn't know about.
>
> For those of you wondering what the problem is, think about how to
> differentiate the traffic destined for one neighbour from the others.
> At the IP layer, it's the same. At the UDP layer, it's the same.
>
> Cheers,
> Dale
>
>
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Received on Wed Mar 24 2010 - 07:16:17 ART