On a switch with MLS enabled does the switch interrupt the flow of packets
from a multicast source when there is a subscribed receiver on it?

For example:  A router with PIM enabled is connected to two switches running
MLS, each with a subscibing host.  One switch (switch1) has the multicast
source attached.  When the multicast begins the source sends a packet with
the multicast address which is added to the MLS table.  The packet then is
processed by the router which forwards it to each switch because both have
subscribing hosts.  When switch1 receives this packet it completes the MLS
entry and forwards the packet to the host.  Now all further packets from the
source are matched in the table and switched directly to the host without
being forwarded to the router.

Does this actually happen or are multicast packets excluded from MLS?


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