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MGCP Call Agent and Media Gateway are not able to register if SIP services are used and MGCP service is not used
Symptoms
  • MGCP Call Agent and Media Gateway are not able to register in the following scenario:

    1. SIP services are used in the rulebase
    2. MGCP service "mgcp_MG" is not used in the rulebase
  • MGCP connection works as expected in the following scenarios:

    • MGCP service is enabled (Protocol Type in the 'mgcp_MG' service properties is set to 'MGCP_UDP')
    • MGCP service and SIP services are not unused
Cause

In case Protocol Type in SIP services is enabled, but Protocol Type in MGCP services is disabled, the MGCP traffic will run through Early NAT. The MGCP traffic eventually fails because the Late NAT is not performed on it.


Solution
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