IGMP and PIM protection

[peter.hicks at poggs.co.uk (Peter Hicks)]

Glen Kent wrote:
> Any idea if folks use AH or ESP to protect IGMP/PIM packets? Wondering
> that if they do, then how would snooping switches work?
>   
Would encrypting multicast not fundamentally break the concept of 
multicast itself, unless you're encrypting multicast traffic over a 
backbone?


Peter