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Cisco Bug: CSCvt16195 - Outbound calls get dropped when ITSP forwards multiple 407 messages

Last Modified

Sep 15, 2020

Products (14)

  • Cisco IOS
  • Cisco ASR 1000 Series IOS XE SD-WAN
  • Cisco 4221 Integrated Services Router
  • Cisco 4331 Integrated Services Router
  • Cisco ASR 1002-X Router
  • Cisco 4321 Integrated Services Router
  • Cisco ASR 1001-X Router
  • Cisco 4351 Integrated Services Router
  • Cisco ISR 4000 Series IOS XE SD-WAN
  • Cisco ISR 1000 Series IOS XE SD-WAN
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Known Affected Releases

16.9.3 16.9.4 16.9.5

Description (partial)

Symptom:
Outbound calls from CUBE to Service Provider being dropped. 
Sip-trunk registration and inbound calls are successful. 



Call Flow:
Phone > CUCM > sip > CUBE > sip > PSTN


Here's flow overview:

TX INVITE cseq 101 w/SDP

RX 407 Proxy Auth required cseq 101 (to-tag=1)
TX ACK 

TX INVITE cseq 102 w/SDP [with credentials]

RX 183 Session Progress w/SDP (to-tag=2)
RX 180 Ringing no SDP (to-tag=2)

RX 407 Proxy Auth required cseq 101 (to-tag=1)
TX ACK 

RX 200OK no SDP
TX ACK
TX BYE reason 96





## CUBE drops a call with following reason:

058965: *Nov  3 18:20:18.295: //9016/606A92800000/SIP/Function/sipSPIGetContentSDP:
058966: *Nov  3 18:20:18.295: //-1/xxxxxxxxxxxx/SIP/Info/verbose/4096/sipSPIGetContentSDP: No SDP found in inbound container
058967: *Nov  3 18:20:18.295: //9016/606A92800000/SIP/Error/ccsip_api_call_connect_media:  Destination SDP Body unavailable
058968: *Nov  3 18:20:18.295: //9016/606A92800000/SIP/Function/ccsip_set_cc_cause_for_spi_err:
058969: *Nov  3 18:20:18.295: //9016/606A92800000/SIP/Info/critical/4096/ccsip_set_cc_cause_for_spi_err: Categorized cause:96, category:96
058970: *Nov  3 18:20:18.295: //9016/606A92800000/SIP/Function/ccsip_set_release_src_and_iec:
058971: *Nov  3 18:20:18.295: //9016/606A92800000/SIP/Function/ccsip_set_release_source_for_peer:
058972: *Nov  3 18:20:18.295: //9016/606A92800000/SIP/Function/sipSPI_ipip_get_peer_callid:
058973: *Nov  3 18:20:18.295: //9016/606A92800000/SIP/Info/verbose/4096/ccsip_set_release_source_for_peer: ownCallId[9016], src[6]


058974: *Nov  3 17:20:18.295: %VOICE_IEC-3-GW: SIP: Internal Error (2xx, dest sdp null): IEC=1.1.96.7.24.1 on callID 9016 GUID=606A9280000100000000E5BA0DF0A8C0

Conditions:
Rare condition when Service Provider is sending 407 Proxy Authentication Required messages constantly even if CUBE send INVITE with credentials and call progressing already.
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
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