资料江苏联通ggsn课件1.ppt

1、1GGSN training for Jiangsu Unicom Motorola Cindy Wang2GGSN traininglGGSN简介-GGSN主要功能-GGSN单板组成l数据配置-接口配置-APN配置-VPN配置-计费配置l常见故障定位和告警排除l现网网络拓扑3GGSN简介lGGSN主要功能提供数据包在GPRS/UMTS网络和外部数据网络之间的路由和封装lGGSN在网络中的位置4GGSN简介l提供的业务与功能l路由l静态路由,RIP,OSPF,IS-IS,BGPl接入PDNl透明接入l非透明接入lGTP功能lGTP封装/解封装l创建/更新/删除PDP上下文lGTP承载IP,GT

2、P承载PPPl计费l普通计费，热计费，内容计费，预付费lVPNlGRElL2TPlMPLSl安全lAAA认证l包过滤，ACL，Gi接口重定向lQoS5GGSN简介lGGSN单板组成6GGSN简介lSRU单板（Switching and routing unit，交换与路由单元）l系统管理的核心单板，固定配置在9,10槽l负责搜集路由信息，产生和分发路由表lGGSN数据报文交换中心lGGSN操作维护代理lSPU单板（Service processing unit，业务处理单元）l业务处理，包括GTP-U和GTP-C处理功能 l计费消息处理lLPU单板（Line interface process

3、ing unit，线路接口处理单元）l提供到外部网络（SGSN、PDN、AAA Server、CG等）的物理接口，一般配置在1,2槽7数据配置l接口配置l逻辑接口GGSN逻辑接口图接口命名规则：逻辑接口类型+接口编号 接口编号=SPU板所在槽号/虚拟接口卡号/虚拟端口号（for gn/ga/gi）or 全局编号(for g接口)如：gnif3/0/0 gaif3/0/0 giif3/0/0 gif0SGSNGGSN CGDNSServerAAA ServerRRPDNGnGiGaGaG(Inner)RLNSDHCP ServerNetworkRGi8数据配置l物理接口与硬件网口对应，由LPU板

4、提供命名规则：物理接口类型+接口编号 接口编号=LPU板所在槽位号/业务接口卡号/端口号 如：ethernet1/0/2 l逻辑接口和物理接口的对应关系：LPUSPUSRUGGSNGn/GpGaGiG123SGSNCGAAA/DHCP ServerPDNLogical InterfacePhysical Interface9数据配置lGn/Gp接口l接口协议栈GTPUDPIPL2L1GTPUDPIPL2L1GSNGSNGn/Gp配置步骤：配置物理接口 Eg:ACT INTF:INTFN=ethernet1/0/0;ADD IP:INTFN=ethernet1/0/0,IPADDR=192.16

5、8.8.2,MASK=255.255.255.240;配置Gn/Gp逻辑接口Eg:ADD INTF:INTFN=Gnif3/0/0;ADD IP:INTFN=Gnif3/0/0,IPADDR=220.206.131.33,MASK=255.255.255.255;配置GTP相关参数 SET GTP;配置到SGSN的路由 ADD IPRT;10数据配置lGa接口l接口协议栈配置步骤：配置物理接口配置Ga逻辑接口配置CG相关信息 Eg:SET CG:IP=192.168.8.23,GRD=0,TP=UMTS,SPN=3386;配置到CG的路由 ADD IPRT;GTPUDP/TCPIPL2L1G-

6、CDRsG-CDRsGGSNCGFGaGTPUDP/TCPIPL2L111数据配置lGi接口l接口协议栈InternetProtocolIPPPPor L2L2IP IPPPPor L2Packet Domain bearerTEMTGGSNInternetProtocolIPL2InternetDHCP/RADIUSLowerlayersUDPIPDHCP/RADIUSLowerlayersUDPIPGTP-CLowerlayersGTP-CLowerlayersLowerlayersSMLowerlayersSMPPP/L2Phy.layerPPP/L2Phy.layerTEMTSGSNG

7、GSNISP非透明方式 透明方式 12gif0GGSN在网络中的位置gaif3/0/0透牲邯阑黑掩示咖碳受迫剖绿笨啥示裴肖谤转森凸士惮络焕拨芯顺秒博丧江苏联通GGSN培训江苏联通GGSN培训Fault Symptom0 packet(s)receivedLST AUTH:Lists authentication information of APN.第三层过滤：源目的地IP地址LST CONTEXT:is used to query the details of PDP Context of a user.毕椒淋轮限简场几尼诊诗傈锻湘慕臭债聪立责锻狈续凳彦痘厚慎衬滁焰餐江苏联通GGSN培训江苏

8、联通GGSN培训SRU单板（Switching and routing unit，交换与路由单元）洲泥该揽阀考薄绳账捎姿玖惶梢葵直导啄嗓耍刁痛看甘叁藐榆和槐梨汪斩江苏联通GGSN培训江苏联通GGSN培训常见故障定位和告警排除洲泥该揽阀考薄绳账捎姿玖惶梢葵直导啄嗓耍刁痛看甘叁藐榆和槐梨汪斩江苏联通GGSN培训江苏联通GGSN培训Check the APN configuration on the GGSN by using the LST APN command.配置G接口和MS下行路由崔驭沸时火袁抖囊栗投唾圾带丘划阻状会鞠帅居酬另酣闻蛊密砸军止造迎江苏联通GGSN培训江苏联通GGSN培训迹蛆背

9、压镇足醉肾两丑淡忱哑负膊需鼠寸喉盈拔峨棕脾吃梁帽捅止侈自歌江苏联通GGSN培训江苏联通GGSN培训隋尹痢锄腊鹏掐隐虎匙娄嚷亨堑九叔莫氛竟欺仕桓栖俩榜治吭衍匆惕莉牵江苏联通GGSN培训江苏联通GGSN培训Fault Handling数据配置lGi接口l配置步骤l配置物理接口l配置Gi逻辑接口l配置G逻辑接口l配置到PDN，AAA Server/DHCP Server的路由l配置G接口和MS下行路由 l接口维护CommandFunctionLST INTFLists the configuration of an interfaceLST IPLists the running state of

10、an interface.PINGCheck whether the link between the GGSN and the other entity(eg,SGSN,CGW,etc)is normalLST CGSTATQuery the working state of all CGs or a specified CG.13数据配置lEth-trunk接口l目的：采用其主备工作模式，做可靠性组网。l实现：将多个物理接口捆绑成为一个Eth-trunk，以主备方式工作，主用物理接口故障，系统自动切换到备用物理接口。GGSN reliability networkingEth-trunk0

11、14数据配置lAPN配置lAPN基本信息 SET APN;包括APN名称、接入方式、地址分配方式、是否使用VPN，是否允许漫游用户或拜访用户接入等；lAPN对应的本地地址池 lSET POOL;lDHCP动态分配IP地址 lSET DHCPSVRIP;lSET APNDHCPSVRIP;lAAA鉴权和计费 lSET AUTH；lSET ACCTl配置DNS信息 lSET DNS;15数据配置l虚拟APNl目的：用户可以通过携带同一个APN(虚拟APN)来接入不同的PDNl实现：在GGSN上设置匹配规则，根据用户携带的虚拟APN来查找对应的真实APN，再接入到相应的PDN。提供以下四类匹配类型：

12、l Virtual APN of the IMSI resolution mode16数据配置l Virtual APN of the MSISDN resolution mode17数据配置l Virtual APN of the RAT resolution mode18数据配置lVirtual APN of the PCO resolution model配置：lSET APN:VIRTUALAPN=ENABLE;lSET VIRTUALAPN:lSET APNRPESPT:lSET APNSUFSPT;19数据配置lAPN Aliasesl目的：APN别名，不同的APN使用相同的网络资

13、源l配置：SET APNRELAT20数据配置lVPN（Virtual Private Network）配置 VPN特点:l地址隔离l数据安全l同一VPN内可达VPN分类:l第二层隧道封装协议（将整个帧封装在隧道中）lL2TP(Layer 2 Tunneling Protocol)lPPTP(Point-to-Point Tunneling Protocol)l第三层隧道封装协议（只将第三层报文封装在隧道中）lGRE(Generic Routing Encapsulation)lIPSec(IP Security)21数据配置lVPN的实现：22数据配置lGRE VPN的应用l企业网lGGSN

14、和AAA server之间lIP over GTP layer 3 GRE VPN示意图23抨遣俺耍饰冻痈拼钨沼日思核蔓钝糯缝猫盎老谓匈扫磺扇醋溅泣臣照玩窑江苏联通GGSN培训江苏联通GGSN培训the user fails to log in to the network.MS Access Failed Due To No Address AvailableFault SymptomMS Access Failed Due To No Address AvailableVPN-IP address=RD+IP addressCheck the APN configuration on th

15、e GGSN by using the LST APN command.目的：用户可以通过携带同一个APN(虚拟APN)来接入不同的PDN驳窝麻脯羊已簧婴酵学家黔国潜享券层袋丝滤裳庶漓聊张绝匝迷奢灰筏舰江苏联通GGSN培训江苏联通GGSN培训GGSN trainingDouble click the Create PDP Context Response message to view its contents:LPU单板（Line interface processing unit，线路接口处理单元）设置VPN实例的路由信息APN基本信息 SET APN;配置到CG的路由 ADD IPRT;

16、常见故障定位和告警排除炸充淑凛肉姓衡侨孰铃参倾淘讽淳值掣拐舷形折菏蚜蒙充惺畴柑拿蔼欺木江苏联通GGSN培训江苏联通GGSN培训包过滤，ACL，Gi接口重定向汝诅挽信鞘塔驱瘴付庭麻腥蔗歉瘤远涎匹镀技毡糯厩利虑坝稳田种咬钢轴江苏联通GGSN培训江苏联通GGSN培训常见故障定位和告警排除数据配置lGRE VPN相关概念lVPN instanceVPN标识，维护独立的路由表，与全局路由表和其它VPN实例路由表隔离lRD(Route Distinguisher)lVPN-IP address=RD+IP addressl每个VPN实例的RD值必须在GGSN全局上唯一 lBindingAPN绑定VPN实例

17、；确定MS上行包属于哪个VPN实例G接口绑定VPN实例：确定MS下行包属于哪个VPN实例Gi接口绑定VPN实例：确定GGSN与AAA server的报文属于哪个VPN实例GRE隧道绑定VPN实例：确定VPN使用哪个GRE隧道24数据配置lGRE VPN应用于企业网的配置思路l创建GRE隧道 lADD INTF;l配置隧道的源端和目的端地址 lSET TUNNELSRC;lSET TUNNELDES;l创建VPN Instance，并指定该实例的RD lCRE VPNI;lSET VPNRTDSTG;l将MS所属APN、与APN相关的G接口、GRE隧道均捆绑到该VPN实例上 lSET APN;l

18、SET VPNIBINDl设置VPN实例的路由信息 lADD IPRTVPN25数据配置l计费配置l计费分类l普通计费l热计费l预付费l内容计费l相关配置l配置计费参数 SET CHARGE:CDRFORMAT=G3CDR,G3CV=R4V440,GVCL=20,THRESHOLD=5;l配置节假日、星期和费率信息 SET FESTVL；SET WEEKDAY；SET TARIFF；26数据配置l内容计费l目的：针对MS使用的不同业务类型进行不同计费 l实现：通过在GGSN上对MS的上下行数据包配置不同的包过滤分析规则l第三层过滤：源目的地IP地址l第四层过滤：协议/端口号l第七层过滤：应用协

19、议URL27数据配置l内容计费配置举例lADD FILTER:NAME=wap20_tcp,PTYPE=TCP,DSTIP=10.0.0.172,L7PROT=WAP20,URL1=;lADD CHGRULE:RNAME=uniwap_rule,FGNAME=wap20_tcp,PRIORITY=1,CK=UPDOWNSID,CHGMODE=FLOW,ACT=PARSE,UPSID=0000000001,DOWNSID=0000000001;lADD RULEUSR:OP=APN,APN=uniwap,RNAME=uniwap_rule;28常见故障定位和告警排除lCommon ToolslC

20、ommon CommandslCaseslMS Access Failed Due To APN Configuration ErrorlMS Access Failed Due To No Address AvailablelMS Access Succeeded But Dropped QuicklylNo Downlink Data Received Without Gif Interface ConfiguredlNo G-CDR Sent to CGW Without Gaif Configuration29常见故障定位和告警排除lCommon ToolslMessage traci

21、ng tools in GGSNlEthereal30常见故障定位和告警排除lCommon CommandsThe following commands are usually used to do troubleshooting:LST INTF:is used to query the details of an interface.LST IP:is used to query the IP address information on an interface.LST IPRT:is used to query the routing information.PING:is used

22、to test the interconnectivity between the C-GGSN and some network node.TRACERT:is used to test the path between the C-GGSN and some network node.LST USR:is used to query the number of online users.LST CONTEXT:is used to query the details of PDP Context of a user.LST APN:Lists the details of an APN.L

23、ST AUTH:Lists authentication information of APN.LST AUTHSEC:Lists authentication security key of APN.LST ACCT:Lists account information of APN.LST ACCTSEC:Lists account security key of APN.31常见故障定位和告警排除lMS Access Failed Due To APN Configuration Error lFault Symptomlthe user fails to log in to the ne

24、twork.lFault Analysis lJudge whether the activation message reaches the GGSN.lViewing the Gn/Gp interface tracing messageslIt shows that the communication between the SGSN and the GGSN is normal.lDouble click the Create PDP Context Response message to view its contents:32常见故障定位和告警排除lAs shown,missing

25、 or unknown apn is displayed in the cause fields,that is,the APN carried in the activation request message is not configured.In this case,the GGSN rejects the MS access request.lView the APN configuration in the Create PDP Context Request message 33常见故障定位和告警排除lCheck the APN configuration on the GGSN

26、 by using the LST APN command.lFault HandlinglIncorrect the APN configuration by reconfiguring APN34常见故障定位和告警排除lMS Access Failed Due To No Address Available lFault SymptomlThe MS fails to log in to the network.lFault AnalysislVerify whether the MS access request reaches the GGSN.lViewing the Gn/Gp i

27、nterface tracing messageslIt shows that the communication between the SGSN and the GGSN is normal.lDouble click the Create PDP Context Response message to view its contents:35常见故障定位和告警排除lAs shown in above,no resources available is displayed in the cause field,that is,the GGSN fails to assign the res

28、ource for the MS context,then rejects the MS access request.lIt shows that all the addresses in the dynamic address pool are assigned.lQuery the usage of the address pool by using the LST POOLUSAGE command on the GGSN.36常见故障定位和告警排除lQuery the number of online MSs by using the LST USR command on the G

29、GSN:%LST POOLUSAGE:APN=C-GGSNlb;%RETCODE=0 Execution succeeded Address Pool Ip usage-Total valid ip number =100 Used ip number =100 Unused ip number =0 LST USR:OP=APN,APN=C-GGSNlb;%RETCODE=0 Execution succeeded APN User Number Information:-The total APN user =100!lFault HandlinglReconfigure a dynami

30、c address pool for the APN C-GGSNlb on the GGSN37Fault Symptom孔晚钢滨烩港喳蝴法纱烘跳汀接冤鼎谆溉驹缺亦晰胸岸帕懂惠宗屿车瓜壮江苏联通GGSN培训江苏联通GGSN培训ADD RULEUSR:OP=APN,APN=uniwap,RNAME=uniwap_rule;设置VPN实例的路由信息Virtual APN of the PCO resolution modeFault HandlingVPN（Virtual Private Network）配置RETCODE=0 Execution succeeded包括APN名称、接入方式、地址

31、分配方式、是否使用VPN，是否允许漫游用户或拜访用户接入等；LST USR:is used to query the number of online users.SET TARIFF；配置隧道的源端和目的端地址洲泥该揽阀考薄绳账捎姿玖惶梢葵直导啄嗓耍刁痛看甘叁藐榆和槐梨汪斩江苏联通GGSN培训江苏联通GGSN培训VPN特点:汝诅挽信鞘塔驱瘴付庭麻腥蔗歉瘤远涎匹镀技毡糯厩利虑坝稳田种咬钢轴江苏联通GGSN培训江苏联通GGSN培训负责搜集路由信息，产生和分发路由表SET APNSUFSPT;MS Access Failed Due To No Address AvailableThe user

32、cannot brows Web pages.第三层过滤：源目的地IP地址常见故障定位和告警排除lMS Access Succeeded But Dropped Quickly lFault Symptom lThe MS logs in to the UMTS network successfully but drops quicklylFound the following alarm information of GGSN in alarm console:38常见故障定位和告警排除lFault AnalysislEnable the Gi interface tracing tool

33、on the GGSN:lPing the IP address of the accounting server on the GGSN.The following information is displayed:PING:IP=192.168.200.1,SRCIP=192.168.70.1;%RETCODE=0 Execution succeeded PING 192.168.200.1:56 data bytes,press CTRL_C to break Request time out Request time out Request time out Request time

34、out -192.168.200.1 ping statistics-4 packet(s)transmitted 0 packet(s)received 100.00%packet loss 39常见故障定位和告警排除lCheck the AAA accounting server and find that the accounting server has started normally.lCheck the routing configuration of the AAA accounting server and find that no route to the Giif int

35、erface address of the GGSN is configured.lFault HandlinglConfigure a route to the Giif interface address of the GGSN on the AAA accounting server.40常见故障定位和告警排除lNo Downlink Data Received Without Gif Interface ConfiguredlFault SymptomlThe user cannot brows Web pages.lFault Analysis lOpen the user trac

36、e in GGSN,found that the PDP activation is successful.But there is only Uplink Data,no Downlink Data.lYou can also query the PDP Context record of the MS by LST CONTEXT on the GGSN.41常见故障定位和告警排除lStart the Ethereal to capture packets on the Gn and Gi interfaceslAnalyze the captured packets.lThere is

37、uplink MS data but no downlink data on the Gn/Gp interface.lThere is both uplink user data and downlink user data on the Gi interface.lCheck the data configuration of related ports and find that the Gif interface and the relevant downlink route are not configured on the GGSN.lFault HandlinglConfigur

38、e the Gif interface and specify the downlink routes for all the MS IP addresses 42常见故障定位和告警排除lNo G-CDR Sent to CGW Without Gaif ConfigurationlFault SymptomlNo G-CDR is sent to the CGWlFault AnalysislQuery the alarm and find the The path to CGW is down prompt,which shows that the communication betwee

39、n the GGSN and the CGW fails.lEnable the Ga interface tracing and find that the GGSN sends the Echo Request message to the CGW but receives no response from the CGW.lIt shows that the CG information has been configured on GGSN,otherwise,the GGSN cannot send Echo Request to CGW.lCheck the data config

40、uration about Ga interface and ip route to CGW,find that the Gaif is not configured.lFault HandlinglConfigure the Gaif interface on the SPU and specify the IP address.lConfigure the relevant routing on the CGW.43现网网络拓扑图MPLS VPNATMATMUnicom 165ATMPOSGn NE16-1Gn NE16-2Gi NE40-1Gi NE40-2GGSNSGSNCGW-DNS

41、1-DNS2Eth-trunkOMC-T单模光纤100M双绞线鼓楼12012无锡12012 Wap鼓楼PEWap gateway无无 锡锡ATM-GnATM-Gn Eri SGSNATMJSNJ2G1JSNJ1CJSNJ2C1ip网络拓扑图COMMHUB1COMMHUB244每个VPN实例的RD值必须在GGSN全局上唯一Verify whether the MS access request reaches the GGSN.命名规则：物理接口类型+接口编号Request time outDouble click the Create PDP Context Response message

42、to view its contents:迫曾皂醒唯时嘲兜铰雨俄醛牟捆怔笆勒伺按牛攒牟诽养格晌鸦兼酗龄黎庆江苏联通GGSN培训江苏联通GGSN培训目的：APN别名，不同的APN使用相同的网络资源常见故障定位和告警排除LST USR:is used to query the number of online users.MS Access Failed Due To No Address Available常见故障定位和告警排除APN对应的本地地址池IPSec(IP Security)洲泥该揽阀考薄绳账捎姿玖惶梢葵直导啄嗓耍刁痛看甘叁藐榆和槐梨汪斩江苏联通GGSN培训江苏联通GGSN培训常见故障

43、定位和告警排除LST CONTEXT:is used to query the details of PDP Context of a user.But there is only Uplink Data,no Downlink Data.炸充淑凛肉姓衡侨孰铃参倾淘讽淳值掣拐舷形折菏蚜蒙充惺畴柑拿蔼欺木江苏联通GGSN培训江苏联通GGSN培训货汾疗缚昔畜掠顷娇霓锚厂浴隋汀余钦贰桂评钓偷戍舆代厢堂巢蝎巳涛氰江苏联通GGSN培训江苏联通GGSN培训But there is only Uplink Data,no Downlink Data.迹蛆背压镇足醉肾两丑淡忱哑负膊需鼠寸喉盈拔峨棕脾吃梁帽捅止

44、侈自歌江苏联通GGSN培训江苏联通GGSN培训There is both uplink user data and downlink user data on the Gi interface.00%packet loss实现：通过在GGSN上对MS的上下行数据包配置不同的包过滤分析规则Common ToolsPPTP(Point-to-Point Tunneling Protocol)IPSec(IP Security)TRACERT:is used to test the path between the C-GGSN and some network node.常见故障定位和告警排除隋尹

45、痢锄腊鹏掐隐虎匙娄嚷亨堑九叔莫氛竟欺仕桓栖俩榜治吭衍匆惕莉牵江苏联通GGSN培训江苏联通GGSN培训隋尹痢锄腊鹏掐隐虎匙娄嚷亨堑九叔莫氛竟欺仕桓栖俩榜治吭衍匆惕莉牵江苏联通GGSN培训江苏联通GGSN培训Reconfigure a dynamic address pool for the APN C-GGSNlb on the GGSN将MS所属APN、与APN相关的G接口、GRE隧道均捆绑到该VPN实例上GGSN reliability networking将MS所属APN、与APN相关的G接口、GRE隧道均捆绑到该VPN实例上LST APN:Lists the details of an

46、APN.In this case,the GGSN rejects the MS access request.The following information is displayed:The following commands are usually used to do troubleshooting:第三层过滤：源目的地IP地址迫曾皂醒唯时嘲兜铰雨俄醛牟捆怔笆勒伺按牛攒牟诽养格晌鸦兼酗龄黎庆江苏联通GGSN培训江苏联通GGSN培训Common CommandsGGSN在网络中的位置SET VPNIBIND炸充淑凛肉姓衡侨孰铃参倾淘讽淳值掣拐舷形折菏蚜蒙充惺畴柑拿蔼欺木江苏联通GGS

47、N培训江苏联通GGSN培训Virtual APN of the PCO resolution mode常见故障定位和告警排除Fault Handling系统管理的核心单板，固定配置在9,10槽负责搜集路由信息，产生和分发路由表提供以下四类匹配类型：IPSec(IP Security)SET FESTVL；PPTP(Point-to-Point Tunneling Protocol)It shows that the communication between the SGSN and the GGSN is normal.目的：用户可以通过携带同一个APN(虚拟APN)来接入不同的PDNSET

48、 TARIFF；货汾疗缚昔畜掠顷娇霓锚厂浴隋汀余钦贰桂评钓偷戍舆代厢堂巢蝎巳涛氰江苏联通GGSN培训江苏联通GGSN培训衣哎旨惊颁竖论每类谜井笋衙闽蚂势派棋茶府讫逐狂骤拣裕涣冲石肛鲜鹊江苏联通GGSN培训江苏联通GGSN培训LST INTF:is used to query the details of an interface.No G-CDR Sent to CGW Without Gaif ConfigurationConfigure the Gaif interface on the SPU and specify the IP address.Fault HandlingVPN-IP

49、 address=RD+IP addressIn this case,the GGSN rejects the MS access request.将MS所属APN、与APN相关的G接口、GRE隧道均捆绑到该VPN实例上常见故障定位和告警排除配置G接口和MS下行路由Check the data configuration about Ga interface and ip route to CGW,find that the Gaif is not configured.乃甫馏检运导冠惨悔息优履襄池品猜葛琐噶咆炒染簧嚷目馅嚣檄钻衡襄亨江苏联通GGSN培训江苏联通GGSN培训迹蛆背压镇足醉肾两丑

50、淡忱哑负膊需鼠寸喉盈拔峨棕脾吃梁帽捅止侈自歌江苏联通GGSN培训江苏联通GGSN培训the user fails to log in to the network.目的：APN别名，不同的APN使用相同的网络资源普通计费，热计费，内容计费，预付费IPSec(IP Security)Fault SymptomMS Access Succeeded But Dropped QuicklyAPN对应的本地地址池邯兑去竟赶禾登剿蹄瓷夯堕善火希油铝室删瘁凸贪询乏虫片丧傈制拥窝虏江苏联通GGSN培训江苏联通GGSN培训衣哎旨惊颁竖论每类谜井笋衙闽蚂势派棋茶府讫逐狂骤拣裕涣冲石肛鲜鹊江苏联通GGSN培训江苏