最新CMTS常见问题及解决办法课件PPT.ppt

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1、CMTS常见问题及解决办法用户HLN3841光节点光发射机TV延长放大器分支器分路器混合器办公室/SOHO楼放TV前端HL回传光接收机RPT3245CMCMTS100M上变频器二级单位10M/100MPC接入交换机数据平台路由器100MCableModem系统组成2常用工具ShowcablemodemDebugcable-modemmaclogverbosePingx.x.x.x3DHCPTFTPTODServersHLUpconvertMCNSUpMCNSdownIPNetworkAccessCMCPE0PoweronHFCCMOffline状态初始状态7DHCPTFTPTO

2、DServersHLUpconvertMCNSUpMCNSdownIPNetworkAccessCMCPE1RangingProcessHFCCablemodemsentinitialrangingCablemodemisrangingCablemodemrangingcomplete状态请求应答过程8Showcablemodemubr7246r#showcablemodemInterface  PrimOnline    TimingRec   QoSCPEIPaddress     MACaddressSid State     OffsetPowerCable2/0/U0

3、5   offline   2287   0.00 2  0  10.1.1.25      0050.7366.2223Cable2/0/U06init(r1)2813   12.002  0  10.1.1.22      0050.7366.1e01Cable2/0/U07init(r2)2810   0.25 2  0  10.1.1.20      0030.96f9.65d9Cable2/0/U08init(rc)2812   0.25 2  0  10.1.1.23      0030.96f9.65da9常见问题回传链路损耗太大10DHCPTFTPTODServ

4、ersHLUpconvertMCNSUpMCNSdownIPNetworkAccessCMCPE2DHCPDiscoverCMTSHFCDhcpreplyreceived;Dhcprequestreceived;IPaddressassigned状态请求应答过程11Showcablemodemubr7246r#showcablemodemInterface  PrimOnline    TimingRec   QoSCPEIPaddress     MACaddressSid State     OffsetPowerCable2/0/U05   offline   2287 

5、  0.00 2  0  10.1.1.25      0050.7366.2223Cable2/0/U06init(d)2813   12.002  0  10.1.1.22      0050.7366.1e01Cable2/0/U07init(d)2810   0.25 2  0  10.1.1.20      0030.96f9.65d9Cable2/0/U08init(d)2812   0.25 2  0  10.1.1.23      0030.96f9.65da12常见问题Missingcablehelper-addresscommando

6、ntheCMTSorincorrectIPConnectivityissuefromtheCMTStotheDHCPserverDHCPserverdownWrongdefaultgatewayconfiguredattheDHCPserverLowtransmitpowerattheCMorlowupstreamSNR,DHCPserveroverloadDHCPserverisoutofIPaddresses13Showcablemodemubr7246r#showcablemodemInterface  PrimOnline    TimingRec

7、   QoSCPEIPaddress     MACaddressSid State     OffsetPowerCable2/0/U05   offline   2287   0.00 2  0  10.1.1.25      0050.7366.2223Cable2/0/U06init(i)2813   12.002  0  10.1.1.22      0050.7366.1e01Cable2/0/U07init(i)2810   0.25 2  0  10.1.1.20