[c-nsp] Source failure in PIM SSM

[A.L.M.Buxey at lboro.ac.uk]

Hi,

> ==================================
> If a broadcast source fails, IOS Software in the Cisco 7600 Series
> router detects the loss of that source, automatically switches that
> source's multicast trunk and its branches, and merges it over to a
> remaining multicast tree. Only a subset of the subscribers might
> experience an almost imperceptible interruption of service, nearly
> instantaneously receiving a healthy broadcast stream from the remaining
> source. 
> ========================================================================
> ================================

broadcast source redundancy?  no. havent used it. would like to though
if it can do what it promises...trouble is, our source is usually
on the WAN...

alan