排除CUBE或IOS語音網關上的忙碌退出撥號對等體故障

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程式設計介面(CCAPI)層失敗，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以TRIING響應，503服務不可用。

即使當撥號對等體在show dial-peer voice summary下顯示為忙碌或活動KEEPALIVE狀態時，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

1. 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

2. 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後出現的。

此問題已記錄在Cisco錯誤ID CSCvz80171中。

可從16.12.8/17.3.6/17.6.3/17.7.1/17.8.1獲得修復