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1、城域网常见故障处理方法目前值班过程中，NOC数据部故障处理班常见故障主要包括：adsl群障，LAN小区群障，MPLS-VPN故障和告警等，现将常见故障的处理办法作简要说明。1．adsl群障adsl用户目前有2种接入方式，IP接入和ATM接入，IP接入的BRAS设备包括ME60,ERX,E320，ATM接入的BRAS有ERX，故有几种不同的故障处理方法。1.IPDSLAM用户通过8512接入ME60的故障处理例：接客服班报石桥铺片区adsl用户报678错误。处理方法：根据报过来的账号，通过亿讯系统查看用户上网记录，发现都是石桥铺ME60上的用户，用户外层VLAN都是11
2、2.首先，登陆石桥铺8512，查看VLAN112是从那一个接口接上来的。disvlan112VLANID:112VLANType:staticRouteInterface:notconfiguredDescription:SQP-RPR-IPDslam(XMZ)-1Name:VLAN0112TaggedPorts:GigabitEthernet1/1/5GigabitEthernet1/1/18UntaggedPorts:none从配置可以看出，VLAN112所在的端口有2个，肯定一个端口为DSLAM接入端口，另一个端口为
3、到ME60的上行端口，查看端口配置，可确定接入端口为那一个。discurintg1/1/5#interfaceGigabitEthernet1/1/5descriptionSQP-RPR-IPDslam(XMZ)-1speed1000duplexfullportlink-typetrunkundoporttrunkpermitvlan1porttrunkpermitvlan1123006broadcast-suppressionbandwidth50#在接入端口上，可以通过查看端口状态，端口流量和查看该端口是否有用户MAC
4、地址上来，做故障判断。disintg1/1/5GigabitEthernet1/1/5currentstate:UPIPSendingFrames'FormatisPKTFMT_ETHNT_2,Hardwareaddressis000f-e226-b529Description:SQP-RPR-IPDslam(XMZ)-1TheMaximumTransmitUnitis1500Mediatypeisopticalfiber,loopbacknotsetPorthardwaretypeis1000_BASE_LX_SMF10
5、00Mbps-speedmode,full-duplexmodeLinkspeedtypeisforcelink,linkduplextypeisforcelinkFlow-controlisnotenabledTheMaximumFrameLengthis10240BroadcastMAX-value:50MAllowjumboframetopassPVID:1Link-statusholdinterval:3SecPortlink-type:trunkVLANpassing:112,3006VLANpermitted:112,3006Trunkportencaps
6、ulation:IEEE802.1qLast300secondsinput:5618packets/sec16513224bits/sec1%Last300secondsoutput:6101packets/sec36051080bits/sec3%Input(total):110805267793packets,45117659613992bytes-broadcasts,-multicastsInput(normal):110805267646packets,45117659559785bytes198306110broadcasts,49905671multic
7、astsInput:147inputerrors,0runts,0giants,12throttles,1CRC134frame,0overruns,-aborts,0ignored,-parityerrorsOutput(total):122885510555packets,89347714630708bytes-broadcasts,-multicasts,0pausesOutput(normal):122885510555packets,89347714630708bytes40303broadcasts,0multicasts,0pauses
