Cisco Bug: CSCuq47742 - CUBE not opening random UDP ports for SIP.
Feb 26, 2020
- Cisco IOS
Known Affected Releases
Symptom: Incoming or outgoing calls over SIP UDP don't work. Outgoing calls don't send the INVITE. Incoming calls, CUBE does not respond to INVITE. You never see UDP random port being open on the CUBE with the debug ip udp. Conditions: SIP Over UDP. IOS version c3900-universalk9-mz.SPA.152-4.M3
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Bug Details Include
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