How to config cascading multicast service in GPON mode?
Compared with normal multicast service, we must pay attention to following two aspects.
1. when you add a new gemport which carry multicast service for sub-node, you must config this gemport as cascading gemport, you can refer to following commands:
gemport add 0 128 cascade on
2. it is also neccessary to config igmp cascading port just like following
igmp cascade-port 0/4/0 gemport 128
In a word, for cascading multicast, you should pay attention to these 2 points, the others are the same as normal multicast service.