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Cisco Bug: CSCvu85544 - CUBE sends no SDP in ACK for Delay Offer due to DNS resolution delay

Last Modified

Sep 11, 2020

Products (1)

  • Cisco IOS

Known Affected Releases

16.6.3

Description (partial)

Symptom:
CUBE is failing to send SDP in ACK due to DNS issue

It will show similar outputs in the debugs

 DNS: info: log_nametypeclass: sending query: fake.cisco.com A IN
DNS: detail: log_name_addr: sending to target: <.> x.x.x.x
DNS: detail: cdns_set_udp_source_interface: using source interface Loopback0 with address x.x.x.x

As DNS resolution is still in progress, we get in this situation

87524: Jun 26 20:22:02.473: //408326/823E815D99A2/SIP/Info/info/4096/act_handle_app_media_event: Received media sip event SIP_REQUEST_ANSWER
787525: Jun 26 20:22:02.473: //408326/823E815D99A2/SIP/Function/sipSPIStopMediaAckTimer:
787526: Jun 26 20:22:02.473: //408326/823E815D99A2/SIP/Function/sipSPIStopTimer:
787527: Jun 26 20:22:02.473: //408326/823E815D99A2/SIP/Function/sact_app_media_event_send_request:
787528: Jun 26 20:22:02.473: //408326/823E815D99A2/SIP/Error/sact_app_media_event_send_request:
ignoring ACK request answer

787550: Jun 26 20:22:02.484: //-1/xxxxxxxxxxxx/SIP/Info/info/4096/ccsip_process_sipspi_queue_event: ccsip_spi_get_msg_type returned: 2 for event 43

788087: Jun 26 20:22:02.498: //408326/823E815D99A2/SIP/Info/verbose/16384/ccsip_bridge: Avoided the race condition where ccConferenceCreatehappens after call_active

Conditions:
DNS resolution delay in CUBE
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