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How to do BC-MC and MC-BC using 2 MLS?

If a broadcast needs to be forwarded from vlan 10 to vlan 20, and vlans are configured as end to end vlan, how should I configure the ip multicast helper map ?

If one broadcast source is located at vlan 10 and at MLS 1, the conversion point should be at int vlan 10 right?

int vlan 10

ip pim dense-mode

ip directed-broadcast

ip multicast helper-map broadcast 239.1.1.1 mcxlate

ip access-list extended mcxlate

permit udp host 10.0.0.10 any eq 65000

ip forward-protocol udp 65000

So if all broadcast recipients are at vlan 20? Which point should the multicast be converted to broadcast and flood vlan 20?

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