Huawei completed the following steps to diagnose the problem:
1. Checked multicast neighbor status.
The neighbor status was normal, but no multicast table entries were generated.
2. Checked multicast service configurations on the ME60.
A global user control list (UCL) and traffic policy was configured for multicast users. A UCL, which consists more than 6000 access control lists (ACLs), is used to manage feature availability to users.
3. Checked UCL policy implementation in V600R002C02SPC700 and V100R005C02B01B.
In V100R005C02B01B, unicast packets (program ordering) from the user side to the network side is permitted. Unicast packets from the network side to the user side were denied, so users cannot access the Internet through an STB.