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1、CMTS常見(jiàn)問(wèn)題及解決辦法用戶(hù)HLN3841光節(jié)點(diǎn)光發(fā)射機(jī)TV延長(zhǎng)放大器分支器分路器混合器辦公室/SOHO樓放TV前端HL回傳光接收機(jī)RPT3245CMCMTS100M上變頻器二級(jí)單位10M/100MPC接入交換機(jī)數(shù)據(jù)平臺(tái)路由器100MCableModem系統(tǒng)組成2常用工具ShowcablemodemDebugcable-modemmaclogverbosePingx.x.x.x3DHCPTFTPTODServersHLUpconvertMCNSUpMCNSdownIPNetworkAccessCMCPE0PoweronHFCCMOffline狀態(tài)初始狀態(tài)7DHCPTFTPTO
2、DServersHLUpconvertMCNSUpMCNSdownIPNetworkAccessCMCPE1RangingProcessHFCCablemodemsentinitialrangingCablemodemisrangingCablemodemrangingcomplete狀態(tài)請(qǐng)求應(yīng)答過(guò)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常見(jiàn)問(wèn)題回傳鏈路損耗太大10DHCPTFTPTODServ
4、ersHLUpconvertMCNSUpMCNSdownIPNetworkAccessCMCPE2DHCPDiscoverCMTSHFCDhcpreplyreceived;Dhcprequestreceived;IPaddressassigned狀態(tài)請(qǐng)求應(yīng)答過(guò)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常見(jiàn)問(wèn)題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??????
