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What does "ip multicast-routing distributed" provide?
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Before MDS (multicast distributed switching) IP multicast traffic was always switched at the Route Processor (RP)
The disadvantages of switching multicast traffic at the RP are:
-Load on the RP
-Performance was limited to what a single RP could switch.
MDS solves these problems by performing distributed switching of multicast packets received at the line cards.
MDS is accomplished using a forwarding data structure called a Multicast Forwarding Information Base (MFIB), which is a subset of the routing table. A copy of MFIB runs on each line card and is always kept up to date with the RP's MFIB table.
To enable MDS do the following:
config#ip multicast-routing distributed
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