断链告警处理案例

>S1断链告警处理指导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:，-桶a吉3?取因州金砂宣馆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:，-桶a吉3?取因州金砂宣馆HEprR4.. •机...附够桂苦歎I昭0胆8逊Mfia2厂仪仝況存rPxEni详?EGfi经艇程4两元=141192/州仝沙3?tftHEpr<r(14092)反碗⑰]注轻仙||瞬左|ds©~|[卑昭]故障分析排查思路根据TD-LTE的网络接门协议，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：S1-AP▼所以处理S1链路故障，需要从底层开始排查：1、 首先排查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、 最后排查是否存在SIAP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。故障排査步骤1、 查看基站告警，是否存在传输类相关告警，例如“网元断链告瞥”、“SCTP偶联断链”告警，若存在以上告警，需要先按照以上告瞥排查指导手册，先解决以上告瞥。2、 检查ENODEB——MME或SGW路由IP地址是否配置正确；通过telnet命令登录到CC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$telnet01前台通过网线直连登录地址：6正在尝试…连接到01(6)（none）login:zte（用户名）Password:zte（密码）

Processing/etc/profile..・Done#/ushell->Pleaseinputpassword!->***（密码zte）->Loginsuccess!!ushelltoolmenu:■ps'or'PS'listprocessrunontheboardfprxxx'or'PRxxx1takeoverxxxprocessprintfinfo"nprxxx'or"NPRxxx'nottakeoverxxxprocessprintfinfo'dbxxx'or'DBxxx'debugxxxprocessprintfinfo'ndbxxx'or•NDBxxx1notdebugxxxprocessprintfinfo'padxxx1or'PADxxx1debugandtakeoverxxxprocessprintfinfo'npadxxx1or*NPADxxx'notdebugandtakeoverxxxprocessprintfinfo■pairor'PALL'displaycurrentdebugandtakeoverinfo'ncheck1or'NCHECK' Donotcheckanotherushellexist'check'or'CHECK'DocheckanotherushellexistQoracancelallprocessdebugandprintfinfo'exit'or'EXITcancelushellxxxisprocessidyouwanttodebugortakeoverprintfinfo$$ps（查看前台进程）PIDUSERVSZSTATCOMMAND1root1304Sinit2rootOSW[softirq-high/3]3rootOSW[softirq-timer/O]4rootOSW[softirq-net-tx/]5rootOSW[softirq-net-rx/]6rootOSW[softirq-blockX）]

7rootOSW[softirq-tasklet]8rootOSW[softirq-sched/D]9rootOSW[softirq-hrtimer]10rootOSW[softirq-rcu/O]11rootOSW[watchdog/3]12rootODW[chkeventdyO]13root0SW<[events/0]14root0SW<[rt_events/0]15root0SW<[khelper]16root0SW<[kthread]17rootosw<[rt_kthread]37rootosw<[kblockd/O]42rootosw<[khubd]83rootOSW[pdflush]84rootOSW[pdflush]85rootosw<[kswapdO]86rootosw<[aio/0]621rootOSW[mtdblockd]678root1253mS/MGR.EXE680root9156S/tftp683root1308Stelnetd685root1312Sinetd686root1312S-/bin/./ash697root0SWN[jffs2_gcd_mtd0]1201root457mS/Productjtejdd.so8891V3.10.10P30R1/AGT」1750root1316S-sh1751root9216R/ushell1753root1304Rsh-cps1754root1308RPS_TDD.EXE$$pad678(登录到平台进程)[678]ushellenterprintmodushellenterdebugmod$$brsping"00"(ping核心网MME地址)[678][begintoexcelfun:brsping ]value=0(0x0)[ endtoexcelfun:brsping ]Ping:findnoroutefordest,sendbydefaultgateway[0xacle8fcl].sendpingseq:1…$$[678]PING===>replyfrom00packetsize=36time=14ms. 正常ping通时返回的时长[678]sendpingseq:2…[678]PING===>replyfrom00packetsize=36time=4ms.[678]sendpingseq:3…[678]PING===>replyfrom00packetsize=36time=3ms.[678]sendpingseq:4…[678]PING===>replyfrom00packetsize=36time=24ms.[678]Pingstatisticsfor00:Packets:Sent=4,Received=4,Lost=0(0%loss),Approximateroundtriptimesinmilli-seconds:Minimum=3ms,Maximum=24ms,Average=11ms(ping核心网MME控制面00地址结果，去包率0%,证明基站到MME链路正常。)brsping,,0,1(ping核心网SGW地址)[678][begintoexcelfun:brsping ]value=0(0x0)[endtoexcelfun:brsping ]sendpingseq:1…$$[678]PING===>replyfrom0packetsize=36time<1ms.[678]sendpingseq:2…[678]PING===>replyfrom0packetsize=36time<1ms.[678]sendpingseq:3…[678]PING===>replyfrom0packetsize=36time=lms.[678]sendpingseq:4…[678]PING===>replyfrom0packetsize=36time<1ms.[678]Pingstatisticsfor0:Packets:Sent=4,Received=4,Lost=0(0%loss),Approximateroundtriptimesinmilli-seconds:Minimum=0ms,Maximum=1ms,Average=0ms（ping核心网SGW用户面0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"showtcb”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。$$showtcb[678][ begintoexcelfun:showtcb ]=====Begin:ShowAssocTCBInfo二二===TCBinfo0:偶联号0ULPID=0,AssolD=0,Checksum=1,InstancelD=0LocalPort=6051,SourIP=0&Vpnld=31PeerPort=6051,DestIP=00,Vpnld=31AssociationState=established（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=2597222817TCBinfo11:偶联号11ULPID=11,AssolD=11,Checksum=0,InstancelD=11LocalPort=36422,SourIP=0&Vpnld=31PeerPort=36422,DestIP=09,Vpnld=31AssociationState=established（此处显示偶联状态，established标示偶联正常）CulTsnAcked=1926134201,NextTsnAssign=1926134202,LastRecvTSN=866462450OutStandingSize=0,PendingChkNum=261888,MtuSize=1500TxReChkNum=0TxStrmNum=2,RxStrmNum=2PeerVerifTag=866462422,MyVerifTag=1926134177TCBinfo12:偶连号12ULPID=12,AssolD=12,Checksum=1,InstancelD=12LocalPort=36422,SourIP=0&Vpnld=31PeerPort=36422,DestIP=3,Vpnld=31AssociationState=established（此处显示偶H关状态，established标示偶联正常）CulTsnAcked=1926134201,NextTsnAssign=1926134202,LastRecvTSN=2040807940OutStandingSize=0,PendingChkNum=261888,MtuSize=1500TxReChkNum=0TxStrmNum=2,RxStrmNum=2PeerVerifTag=2040807912,MyVerifTag=1926134177TCBinfo13:偶连号13ULPID=13,AssolD=13,Checksum=1,InstancelD=13LocalPort=36422,SourIP=0&Vpnld=31PeerPort=36422,DestIP=5,Vpnld=31AssociationState=cookie_wait（此处显示偶联状态，cookiewait标示偶联不正常）CulTsnAcked=0,NextTsnAssign=2957087305,LastRecvTSN=0OutStandingSize=0,PendingChkNum=4294967168,MtuSize=0TxReChkNum=0TxStrmNum=2,RxStrmNum=2PeerVerifTag=0,MyVerifTag=2957087305TCBinfo14:偶连号14ULPID=14,AssolD=14,Checksum=1,InstancelD=14LocalPort=36422,SourIP=0&Vpnld=31PeerPort=36422,DestIP=9,Vpnld=31AssociationState=cookiewait（此处显示偶联状态,cookiewait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:ShowAssocTCBlnfo====二value=34(0x22)[ endtoexcelfun:showtcb ]$$exit(退出平台进程)ushellrecvsigno:0・quitdebugandexitushell!#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-UTRANTDD小区中跟踪区码TAC是否按照EPC协商的值配置，如卜•图所示：I4(W