簡介
本檔案介紹Cisco Unified Border Elements/語音網關撥號對等體狀態忙碌退出和Cisco IOS®升級後呼叫失敗的問題。
必要條件
需求
本文件沒有特定需求。
採用元件
本檔案中的資訊是根據思科整合邊界元件(CUBE)。
本文中的資訊是根據特定實驗室環境內的裝置所建立。文中使用到的所有裝置皆從已清除（預設）的組態來啟動。如果您的網路運作中，請確保您瞭解任何指令可能造成的影響。
背景資訊
本文檔介紹Cisco IOS®升級到16.12.6/17.3.5/17.6.1或更高版本後的故障。
問題
在Cisco IOS升級到16.12.6/17.3.5/17.6.1/17.7.1或更高版本後，通過Cisco IOS語音網關或CUBE呼叫失敗。
症狀
當CUBE收到SIP呼叫並與配置了「session server-group」和「sip options-keepalive」的傳出撥號對等體匹配時，該呼叫在呼叫控制應用程式設計介面(CCAPI)層失敗，且「原因值」為188。
CUBE不會向作為伺服器組一部分的目標伺服器傳送出站INVITE。
傳入的INVITE響應為TRIING，503服務不可用。
即使撥號對等體在「show dial-peer voice summary」下顯示為忙碌退出或活動KEEPALIVE狀態，也會觀察到相同的行為。
示例配置/撥號對等體狀態/調試代碼段：
dial-peer voice 1000 voip
destination-pattern ^1000$
session protocol sipv2
session transport tcp
session server-group 1
voice-class sip options-keepalive profile 1
voice-class sip bind control source-interface GigabitEthernet0/0/1
voice-class sip bind media source-interface GigabitEthernet0/0/1
dtmf-relay rtp-nte sip-kpml
codec g711ulaw
ip qos dscp cs3 signaling
no vad
voice class server-group 1
ipv4 10.106.117.11
ipv4 10.106.117.6 preference 1
show dial-peer voice summary
AD PRE PASS SESS-SER-GRP OUT
TAG TYPE MIN OPER PREFIX DEST-PATTERN FER THRU SESS-TARGET STAT PORT KEEPALIVE VRF
3001 voip up up 0 syst NA
1000 voip up up ^1000$ 0 syst SESS-SVR-GRP: 1 busyout NA
show dial-peer voice summary
AD PRE PASS SESS-SER-GRP OUT
TAG TYPE MIN OPER PREFIX DEST-PATTERN FER THRU SESS-TARGET STAT PORT KEEPALIVE VRF
3001 voip up up 0 syst NA
1000 voip up up ^1000$ 0 syst SESS-SVR-GRP: 1 active NA
Debug snippet:
007592: Apr 7 07:28:56.046: //-1/xxxxxxxxxxxx/SIP/Msg/ccsipDisplayMsg:
Received:
INVITE sip:1000@10.106.117.5:5060 SIP/2.0
Via: SIP/2.0/UDP 10.106.117.2:5060;branch=z9hG4bK51889
Remote-Party-ID:
;party=calling;screen=no;privacy=off From:
;tag=12EE76F8-154A To:
Date: Wed, 06 Apr 2022 18:28:16 GMT Call-ID: 28E9846D-B50E11EC-8025D5B1-C2D1F237@10.106.117.2 Supported: 100rel,timer,resource-priority,replaces,sdp-anat Min-SE: 1800 Cisco-Guid: 0678152134-3037598188-2149635505-3268538935 User-Agent: Cisco-SIPGateway/IOS-12.x Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, UPDATE, REFER, SUBSCRIBE, NOTIFY, INFO, REGISTER CSeq: 101 INVITE Max-Forwards: 70 Timestamp: 1649269696 Contact:
Expires: 180 Allow-Events: telephone-event Content-Type: application/sdp Content-Disposition: session;handling=required Content-Length: 247 v=0 o=CiscoSystemsSIP-GW-UserAgent 8965 7288 IN IP4 10.106.117.2 s=SIP Call c=IN IP4 10.106.117.2 t=0 0 m=audio 18406 RTP/AVP 0 101 c=IN IP4 10.106.117.2 a=rtpmap:0 PCMU/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=ptime:20 007649: Apr 7 07:28:56.050://-1/286BC7C68020/SIP/Info/info/2048/sipSPIGetCallConfig: Peer tag 3001 matched for incoming call 007872: Apr 7 07:28:56.061: //89/286BC7C68020/CCAPI/ccCallSetupRequest: Destination=, Calling IE Present=TRUE, Mode=0, Outgoing Dial-peer=1000, Params=0x7FF65E441DE8, Progress Indication=NULL(0) 007935: Apr 7 07:28:56.064: //-1/xxxxxxxxxxxx/SIP/Info/critical/8192/ccsip_call_setup_request: SIP Dialpeer 1000 busied out due to options-keepalive profile in server group 008160: Apr 7 07:28:56.073: //90/286BC7C68020/CCAPI/cc_api_call_disconnected: Cause Value=188, Interface=0x7FF64F4542E8, Call Id=90 008199: Apr 7 07:28:56.077: //89/286BC7C68020/CCAPI/ccCallDisconnect: Cause Value=188, Tag=0x0, Call Entry(Previous Disconnect Cause=0, Disconnect Cause=0) 008239: Apr 7 07:28:56.079: //89/286BC7C68020/SIP/Msg/ccsipDisplayMsg: Sent: SIP/2.0 503 Service Unavailable Via: SIP/2.0/UDP 10.106.117.2:5060;branch=z9hG4bK51889 From:
;tag=12EE76F8-154A To:
;tag=1C2F76-17F5 Date: Wed, 06 Apr 2022 17:28:56 GMT Call-ID: 28E9846D-B50E11EC-8025D5B1-C2D1F237@10.106.117.2 Timestamp: 1649269696 CSeq: 101 INVITE Allow-Events: telephone-event Server: Cisco-SIPGateway/IOS-17.3.5 Reason: Q.850;cause=0 Session-ID: 00000000000000000000000000000000;remote=3c1f754eba075201a684fda2c51c04df Content-Length: 0
因應措施
- 使用「session target ip4：」而不是「session server-group」配置傳出撥號對等體。如果需要，請為伺服器組的每個IP建立單獨的撥號對等體。
dial-peer voice 1000 voip
session target ipv4:x.x.x.x
dial-peer voice 1001 voip
session target ipv4:x.x.x.x
- 刪除撥號對等體上的「sip options-keepalive」。
dial-peer voice 1000 voip
no voice-class sip options-keepalive profile 1
3.降級到更早的版本。此問題是在承諾使用思科錯誤ID CSCvx92872後引起的。
此問題已記錄在Cisco錯誤ID CSCvz80171上，可從16.12.8/17.3.6/17.6.3/17.7.1/17.8.1獲得修復
意見