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Knowledge Base

Why Multicast streams is not working on CMC MA5633?

Publication Date:  2018-10-25  |   Views:  439  |   Downloads:  0  |   Author:  t84102067  |   Document ID:  EKB1001943814


Issue Description

The product Model is : SmartAX MA5633.


Multicast streams is not working on CMC MA5633.


Below added 2 lines for the multicast protocol (igmp version 2) but missing the multicast streams on  TV set or with VLC on my PC.



cable multicast authorization enable default-action permit max-sessions 16

cable multicast igmp-version v2

MA5633#display cable multicast config


Multicast Authorization            : enable

Default Authorization Action       : permit

Default Maximum Number of Sessions : 16

Multicast DSID Forwarding (MDF)    : enable

Multicast VLAN                     : -

IGMP Version                       : v2

Multicast Balancing Policy         : session-based



First we need to collect logs (Upstream+ downstream+ multicast)



MA5800-X17(config)#display patch all

MA5800-X17(config)#display current-configuration

MA5800-X17(config)#display alarm  history  all list  

MA5800-X17(config)#display event history all list

MA5800-X17(config)#display cable event history list

MA5800-X17(config)#display cable modem all

MA5800-X17(config)#display cable upstream all status

MA5800-X17(config)#display cable downstream all status

MA5800-X17(config)#display cable modem cm-index detail      

MA5800-X17(config)#display cable modem phy cm-index         

MA5800-X17(config)#display cable multicast replication 0/1/0

MA5800-X17(config)#display cable multicast replication cm

MA5800-X17(config)#display cable multicast replication group-ip

MA5800-X17(config)#display cable multicast gsf 0/1/0

MA5800-X17(config)#display cable multicast 0/1/0

MA5800-X17(config)#display igmp program member all

MA5800-X17(config)#display cable multicast user all


After analyzing the logs we understood that the version of MA5633 is R17C00 now, the version of R17C00 is not fully supported for multicast. It is recommended to upgrade the R18C00 version before testing again.

Also We need to add  two below  configuration:

cable service-class name test downstream priority 5

cable multicast group qos default service-class test

and modified one configuration:

igmp mode snooping  à igmp mode proxy

Then we reset the CM 1, it works after online.

For the CM 2, we did nothing changed compare to CM 1.


After upgrading firmware to R18 and also adding above IGMP configuration, Multicast streamlining starts working properly.