断链告警处理案例

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1、精品文档 S1断链告警处理指导1.故障现象描述告警管理中查看到基站上报“S1断链告警(198094830)”告警码，如下图所示:戊认伏连耒聊认二酒誓访别产五冈元140gsN金沙宜tSHEp必40博阿元内定住地面资亚（M。SDRR 属加利。SDR=1,Pl= 1际惟岩3汨遇危孑系统成胆(30价匕等因91断链管舂190094830)台班原因1.SCTP 网陶，2.S1所建立矢收(忸商矢域殖砧无小区),发生切口201 3-06-0517 1377诋突加它理丽(MDSDR)匕尊翘JSrtfiS附方加：SCTP假i联4 0,61 AR建立蝴(协用失触或法站无1区)、,单校序列： 25601130018D

2、ADMCS否例的计救产品TD-LTE114视酝际酝内定位L9含警修改时回附加内容玷点ID漏时：化0”：站点名堀比冏：14092-F州a少箕tgHEorc卡安对强案空：9DR; 告95对剧 14022,吉晓今名女 MO92r冲金秋五fEHE即,知法或：CCC.嫡认皈纹久用尸行号漏认伏忑告皆受别 iRK|网元内定位声辔的省警原因，“亲确4g 14092J-H SffiHEpr（；（14.地血掰源（“。8。市1,缸_99094830H 1 zHQO p-iiix*.!/. rPtQL-jPnrr 1 HiHA QCiPY 1并让1EH/f4 G AflOLSCTP低翩U 2 S1妒理立失陶 ( 仍育

3、先所 jt3千ht田小rr zim%出咕依：潇容ft 两元; ldU92 J州金沙宾和limr，：(ld(J97)一因详图信息|姓酶设2 .故障分析排查思路根据TD-LTE的网络接口协议，S1链路是建立在物理传输层、数据链路层、IP协议层、SCTP偶联链路之上的传输协议层，如下图所示：所以处理si链路故障，需要从底层开始排查：1、 首先排杳站点是否存在传输告警，排除传输故障；2、 其次基站IP地址配置是否正常；3、 再次确认SCTP偶联断告警，排除SCTP偶联告警；4、 最后排杳是否存在SI AP建立失败（协商失败或基站无小区），与核心网核对小区TAC值是否配置一致。3 .故障排查步骤1、 查

4、看基站告警，是否存在传输类相关告警，例如“网元断链告警”、“SCTP偶联断链”告警，若存在以上告警，需要先按照以上告警排查指导手册，先解 决以上告警。2、 检查ENODEBMME或SGW路由IP地址是否配置正确；通过telnet命令登 录至IJCC板，使用BRS命令对MME及SGW地址进行PING包测试，详细登 录方式如下，红色字体均需要输入：通过服务器远程登录：bash-3.2$ telnet 10.30.143.201前台通过网线直连登录地址：192.254.1.16正在尝试连接到 10.30.143.201 （192.254.1.16）（none） login: zte （用户名）Pas

5、sword: zte （密码）Processing /etc/profile. Done#/ushell- Please input password!-* （密码 zte）- Login success!ushell tool menu:ps，orPSlist process run on the boardpr xxx1orPR xxxtake over xxx process printf infofnpr xxxorNPR xxx not take over xxx process printf infodb xxxorDBxxxdebug xxx process printf inf

6、ofndb xxxorNDB xxx1 not debug xxx process printf infopad xxx1orPAD xxx1debug and take over xxx process printf infonpad xxx1orNPAD xxxnot debug and take over xxx process printf infopallorPALLdisplay current debug and take over infoncheck1orNCHECKDo not check another ushell existcheckor,CHECKDo check

7、another ushell existQorqcancel all process debug and printf infoexitorEXIT1cancel ushellxxx is process id you want to debug or take over printf info$ps （查看前台进程）PID USER VSZ STAT COMMAND1 root1304 Sinit2 rootOSWsoftirq-high/33 rootOSWsoftirq-timer/O4 rootOSWso 代 irq-net-tx/5 rootOSWsoftirq-net-rx/6 r

8、ootOSWsoftirq-block/O7 rootOSWsoftirq-tasklet8 rootOSWsoftirq-sched/O9 rootOSWsoftirq-hrtimer10 rootOSWsoftirq-rcu/311 rootOSWwatchdog/D12 rootODWchkeventd/O13 root0SWevents/014 root0SWrt_events/015 root0SWkhelper16 root0SWkthread17 root0SWrt_kthread37 rootoswkblockd/O42 rootoswkhubd83 rootOSWpdflus

9、h84 rootOSWpdflush85 rootoswkswapdO86 rootoswreply from 200.1.10.200 packetsize=36 time=14ms.正常 ping 通时返回的时长678send ping seq: 2.678PING=reply from 200.1.10.200 packetsize=36 time=4ms.678send ping seq: 3.678PING=reply from 200.1.10.200 packetsize=36 time=3ms.678send ping seq: 4.678PING=reply from 200

10、.1.10.200 packetsize=36 time=24ms.678Ping statistics for 200.1.10.200:Packets: Sent = 4, Received = 4, Lost = 0(0% loss),Approximate round trip times in milli-seconds:Minimum = 3ms, Maximum = 24ms, Average = 11ms(ping核心网MME控制面200.1.10.200地址结果,丢包率0%,证明基站到MME链路正常。)brsping ”200.130.20” (ping 核心网 SGW 地址

11、)678 begin to excel fun:brsping value = 0(0x0) end to excel fun:brsping send ping seq: 1.$678PING=reply from 200.1.30.20 packetsize=36 time reply from 200.1.30.20 packetsize=36 time reply from 200.1.30.20 packetsize=36 time=lms.678send ping seq: 4.678PING=reply from 200.1.30.20 packetsize=36 time 1m

12、s.678Ping statistics for 200.1.30.20:Packets: Sent = 4, Received = 4, Lost = 0(0% loss),Approximate round trip times in milli-seconds:Minimum = 0ms, Maximum = 1ms, Average = 0ms（ping核心网SGW用户面200.L30.20地址结果,丢包率0%,证明基站到SGW链路正常。）通过以上步骤，排查基站到EPC的控制面MME和用户面SGW链路均正常。3、 Pad到平台进程，showtcb查看偶联状态，继续在平台进程中输入“sh

13、owtcb”命令查看，偶联状态是否正常，若偶联异常，按 照偶联断链告警指导手册处理。$showtcb678 begin to excel fun:showtcb =Begin:Show Assoc TCB lnfo=TCB info 0:偶联号 0ULPID = 0, AssolD = 0, Checksum = 1, InstancelD = 0LocalPort = 6051, SourIP = 100.64.20.108, Vpnld = 31PeerPort = 6051, DestIP = 200.1.10.200, Vpnld = 31Association State = est

14、ablished （此处显示偶联状态，established标示偶联正常）CulTsnAcked = 2597222824, NextTsnAssign = 2597222825, LastRecvTSN = 1479945961OutStandingSize = 0, PendingChkNum = 261888, MtuSize = 1500TxReChkNum = 0TxStrmNum = 2, RxStrmNum = 2PeerVerifTag = 1479945957, MyVerifTag = 2597222817TCB info 11:偶联号 11ULPID = 11, Asso

15、lD = 11, Checksum = 0, InstancelD = 11LocalPort = 36422, SourIP = 100.64.20.108, Vpnld = 31PeerPort = 36422, DestIP = 100.64.20.109, Vpnld = 31Association State = established （此处显示偶联状态，established标示偶联正常）CulTsnAcked = 1926134201, NextTsnAssign = 1926134202, LastRecvTSN = 866462450OutStandingSize = 0,

16、 PendingChkNum = 261888, MtuSize = 1500TxReChkNum = 0TxStrmNum = 2, RxStrmNum = 2PeerVerifTag = 866462422, MyVerifTag = 1926134177TCB info 12:偶连号 12ULPID = 12, AssolD = 12, Checksum = 1, InstancelD = 12LocalPort = 36422, SourIP = 100.64.20.108, Vpnld = 31PeerPort = 36422, DestIP = 100.64.43.43, Vpnl

17、d = 31Association State = established （此处显示偶联状态，established标示偶联正常）CulTsnAcked = 1926134201, NextTsnAssign = 1926134202, LastRecvTSN = 2040807940OutStandingSize = 0, PendingChkNum = 261888, MtuSize = 1500TxReChkNum = 0TxStrmNum = 2, RxStrmNum = 2PeerVerifTag = 2040807912, MyVerifTag = 1926134177TCB i

18、nfo 13:偶连号 13ULPID = 13, AssolD = 13, Checksum = 1, InstancelD = 13LocalPort = 36422, SourIP = 100.64.20.108, Vpnld = 31PeerPort = 36422, DestIP = 100.64.25.85, Vpnld = 31Association State = cookie_wait （此处显示偶联状态，cookie wait标示偶联不正常）CulTsnAcked = 0, NextTsnAssign = 2957087305, LastRecvTSN = 0OutStand

19、ingSize = 0, PendingChkNum = 4294967168, MtuSize = 0TxReChkNum = 0TxStrmNum = 2, RxStrmNum = 2PeerVerifTag = 0, MyVerifTag = 2957087305TCB info 14:偶连号 14ULPID = 14, AssolD = 14, Checksum = 1, InstancelD = 14LocalPort = 36422, SourIP = 100.64.20.108, Vpnld = 31PeerPort = 36422, DestIP = 100.64.43.39,

20、 Vpnld = 31Association State = cookie wait （此处显示偶联状态，cookie wait:标示偶联不正常）CulTsnAcked = 0, NextTsnAssign = 2529838369, LastRecvTSN = 0OutStandingSize = 0, PendingChkNum = 4294967168, MtuSize = 0TxReChkNum = 0TxStrmNum = 2, RxStrmNum = 2PeerVerifTag = 0, MyVerifTag = 2529838369=End:Show Assoc TCB lnfo

21、=value = 34（0x22） end to excel fun:showtcb $exit （退出平台进程）ushell recv signo:0.quit debug and exit ushell!# exit （退出基站CC单板连接）关闭连接。4、 排查传输和基站偶联异常问题后，若S1断链故障还未解决，需要排查与EPC之间的S1对接参数核对，检查TD-LTE的E-UTRAN TDD小区中跟踪区码TAC 是否按照EPC协商的值配置，如卜.图所示：臼%Re s| 1000D1I1881 W.1O3：64OS0)盛于网*?隆缸“MB可 李疝子冏网牌注河茶。隽段祜凰e 金 BS&7C0r

22、IO92fTDLH1 4092 回修MZM 向I快感XS*充锣及 磅没彳、任第*元小代5 N TD-LTE咬双天匚配天 元长曲妗配置 。出芳无旧安 QosEfi5RMITDD44Z Q上下行知良信点肥囊 国防喇一“ 冬空依限.福入盘唐 上行功率及制一下行功率拄制d iwa5F。ICIC。d-GOoS& GWLP 期2且刑度一邳 7OLTESt?H如果此参数与EPC侧配置不一致，会导致S1链路建立失败，需要按照规划修改 此配置参数。4.故障排查总结si链路基于高层的协议链路，排杳过程涉及到多个底层协议链路，需要从底层链路开 始排查:1、首先需要确定物理传输链路是否正常。2、其次排查IP协议层地址是否配置正确。3、再次确认SCTP偶联链路是否正常。4、最后检查与EPC侧S1对接参数TAC是否配置一致。