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Cisco Bug: CSCsz23922 - "ip igmp ssm-map static" is ignored when IGMP is triggered via MGCP MoH

Last Modified

Feb 15, 2018

Products (1)

  • Cisco IOS

Known Affected Releases


Description (partial)

using command 
ip igmp ssm-map static <acl> <mcast source>

When IGMPv2 membership report w/o source is triggered via MGCP for MoH, static map is not processed and membership report is rejected as being in SSM range w/o source specified. 

debug ip igmp will show
IGMP(0): Ignoring request to join group, SSM group without source specified


IOS router is a analog voice gateway and will join mcast group on behalf of PSTN caller for music on hold. Router is triggered to join mcast group via MGCP message from call manager.
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