Symptom
PIM SSM mode with DNS source mapping, native IGMPv3 reports are not processed correctly, only IGMPv2-to-IGMPv3 mapping triggers the mroute creation in SSM mode with DNS source mapping. IGMPv3 reporters don't receive mcast traffic and cannot subscribe for a requested (S,G) entry.
Conditions
PIM SSM mode with DNS source mapping, IGMPv3 reporters
Workaround
Static ssm-map works fine:
ip pim ssm range ssm-map
ip access-list standard ssm-map
permit
ip igmp ssm-map static ssmap
ip igmp ssm-map static ssmap
