All things related to multicast

[Alan Crosswell <>]

Yes, it's a real problem even just with redundant uplinks (e.g. HSRP). 
If you are running an interior routing protocol then the RPF check might
work.  I'd be interested to hear what you learn or others have done, and
with which load balancer product.  I know for instance that redundant
Cisco CSMs use multicast for their own state synchronization and
failover and break user multicast entirely.

Tsao, Johnny wrote:
> Hello,
>
> I want to validate my finding and seek advice with the group in regards to 
> IP Multicast RPF failure.
>
> When IP Multicast server (sourcing the stream) resides behind the load 
> balancer it fails the RPF checks.
>
> Has anyone ran into a need to have redundant clustered servers scenario 
> where secondary multicast server takes over when primary fails?  And how 
> were the server cluster configured to overcome the RPF requirement?
>
> Thanks in advance for feedback.
>
> -JT
> ***********************************
> Johnny Tsao, CCIE No. 8759, CISSP
> Technology Infrastructure Services
> -Strategic Engineering & Architecture (SEA)
> California State University
> Tel: 562.346.2218 * Fax: 562.346.2223
> Email: 
> 
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