ObjectivesMaster basic troubleshooting methods.Use the commonly used commands to identify the problems.To solve the common service faults in MA5300.Upon Completion of this course, you will be able to:

ContentsSome Ideas in TroubleshootingHow to Troubleshoot in MA5300Service Troubleshooting in MA5300

Some Ideas in TroubleshootingGeneral procedure of troubleshooting.

Recognizing Symptoms Understanding the Problem Identifying Cause of the Problem Solving the Problem

Some Ideas in TroubleshootingCommon methods in troubleshooting:Layer-based analysis Isolation analysisComparison analysisSwapping analysis

Layer-based AnalysisPhysicalData LinkNetworkTransportSessionPresentationApplicationCable fail, board fail, cable disconnectedPVC, VLAN, PPP link failDestination unreachable,

Isolation AnalysisVDSL ModemDSLAMBASDHCP ServerRadius Server

Comparison Analysis Ordinary subscribersOrdinary subscribersOrdinary subscribersOrdinary subscribersCommercial subscribers Commercial subscribers Commercial subscribers MA5300(Built-in BAS)..

Swapping AnalysisVDSL ModemDSLAMBASDHCP ServerRadius ServerLow SpeedFTP ServerSwapComponent

Troubleshooting ToolsCommon tools used in troubleshooting:

Command LineNMSNetwork analyzer (Ethereal, Sniffer, Analyzer)

ContentsSome Ideas in TroubleshootingHow to Troubleshoot in MA5300Service Troubleshooting in MA5300

Physical Layer TroubleshootingIndicatorModem: ADSL line sync, Ethernet stateBoard: RUN, ALARMInterface: State, Data

Physical Layer TroubleshootingAlarm[BAS]display trap Display trap buffer:# [02/23/2004 23:57:33-] DEV-2-070f2004:frame 0 slot 0 subslot 0 port 10 upMA5300(config)#show alarm list allALARMID OUTPUT STATISTIC ALARM_NAME0x00200000 YES NO 15-minute threshold alarm0x00200001 YES NO 24-hour threshold alarm0x02300003 YES NO Clock SDH source switch

Physical Layer TroubleshootingDisplay state of the interface. [bas1-for-nms]display interface Ethernet 5 Ethernet5 current state : DOWN Line protocol current state : DOWN Description : HUAWEI, ISU, Ethernet5 Interface The Maximum Transmit Unit is 1500, The keepalive is 10(sec) MA5300(config)#show interface adsl 0/0/0Adsl0/0/0 is administratively down The ADSL link is deactive Bind line-profile No.1 LINE-PROFILE-1 Bind alarm-profile No.1 ALARM-PROFILE-1

Physical Layer TroubleshootingDisplay working state of the boardMA5300(config)#show board 0SlotID BoardName Status SubType1 SubType2 0 EADA Normal 1 2 3 4 5 6 7 ESMA Active_normal O2GAE E4FE 8 ESMA Standby_normal O2GAE E4FE

Physical Layer TroubleshootingADSL line conditionMA5300(config)#show adsl line state adsl 0/0/0Current Link Status : deactive Atuc Current Snr Margin(dB) : 0 Current Chan Attenuation(dB) : 0 Current Output Power(dBm) : 0 Current Attainable Rate(Kbps) : 0 Current Transmission Mode : NONE Channel Interleave Delay(ms) : 0 Channel Current tx-Rate(Kbps) : 0 Atur

Data Link Layer TroubleshootingCheck working mode of ModemCheck the pvc configuraitonMA5300(config)#show interface adsl 0/0/0Adsl0/0/0 is administratively down The ADSL link is deactive Bind line-profile No.1 LINE-PROFILE-1 Bind alarm-profile No.1 ALARM-PROFILE-1 Line coding type is DMT Local-Tx-Rate 0 Kbps, Remote-Tx-Rate 0 Kbps, _ADSL_TX PVC: vpi is 0, vci is 35

Data Link Layer TroubleshootingCheck the VLAN configurationMA5300(config)#show vlanNow, the following vlan exist(s): 1(default), 99, 128-175MA5300(config)#show interface adsl 0/0/0Adsl0/0/0 is administratively down The ADSL link is deactivePVID is 128Port mode: access Tagged VLAN ID : none Untagged VLAN ID : 128

Data Link Layer TroubleshootingMA5300(config)#show interface gigabitEthernet 7/1/1GigabitEthernet7/1/1 is up Hardware is Gigabit Ethernet, Hardware address is 00e0.fc1e.efc9. PVID is 1 Priority is 0 Max multicast group count: 2 Port mode: trunk Vlan passing : 1(default vlan), 99 Vlan allowed : 1(default vlan), 2-4000

Network Layer TroubleshootingCheck IP configuration of the customers computer.Display interface state[BAS]display interface GigabitEthernet 10 GigabitEthernet10 current state : UP Line protocol current state : UP Description : HUAWEI, ISU, GigabitEthernet10 InterfacePingMA5300#ping 172.31.1.53

Network Layer TroubleshootingCheck IP routedisplay ip routing-table Routing Table: public netDestination/Mask Proto Pre Cost Nexthop Interface127.0.0.0/8 DIRECT 1 0 127.0.0.1 InLoopBack0127.0.0.1/32 DIRECT 1 0 127.0.0.1 InLoopBack0

MA5300(config)#show ip routeRouting Tables:Destination/Mask Proto Pre Metric Nexthop Interface127.0.0.0/8 DIRECT 0 0 127.0.0.1 InLoopBack0172.31.1.0/24 DIRECT 0 0 172.31.1.52 Vlan-interface99

Network Layer TroubleshootingDebugterminal monitorterminal debuggingdebugging dhcpr packetTracetrace object ? ethernet Object ethernet number gigabitethernet Object ethernet number ip-address Object ip address mac-address Object mac address trunk Object trunk number user-name Object user name

ContentsSome Ideas in TroubleshootingHow to Troubleshoot in MA5300Service Troubleshooting in MA5300

PPPoE Service TroubleshootingCommon service problems in MA5300:

User cannot find the PPPoE server.Username or password is incorrect.Low speed.

PPPoE Service TroubleshootingUser cannot find the PPPoE server.

Cause: The PPPoE client cannot find the PPPoE server.Locating problem: Physical layer, or data link layer.Solving problems:[User]Check the PPPoE client was installed correctly;Check the Physical connection between computer and modem, modem and the phone line;Check modem was configured correctly;

PPPoE Service Troubleshooting[DSLAM]Check the EAD board state, and the ADSL line state;Check the connection between DLSAM and BAS;Check the vpi/vci of the ADSL port;Check the VLAN configuration in DSLAM;ADSL port and uplink ethernet port.[BAS]Check the PPPoE configuration in BAS.Virtual-template and whether the port is bound with VT.

PPPoE Service TroubleshootingUsername or password is incorrect.Cause: user cannot pass authentication.Locating problem: PPP link layer, network layer. Physical layer works. Physical layer is working normally.Solving problems:[User]Confirm the user input correct username and password;[BAS]Check the authentication configuration in BAS, whether the user uses local authentication or Radius authentication.

PPPoE Service TroubleshootingIf the user uses local authentication, check whether this username and password was configured in the BAS correctly.If the user uses Radius authentication, check the Radius configuration. [External equipment]Check the Radius server is working normally, and is reachable.Check the username and password was configured in the Radius correctly.

PPPoE Service TroubleshootingLow speed.Solving problems:[User]Check the users computers hardware configuration, and running performance.Check the cable and line is fully connected.[DSLAM]Check the quality of the ADSL lineCheck the transmission rate configuration of the ADSL line profile.

PPPoE Service Troubleshooting[BAS]Check the CAR configuration of the user.Ping destination IP address to see whether there is a traffic bottleneck to the destination in network.If possible, connect a server directly with BAS, observe the traffic on the users computer.

DHCP Service TroubleshootingUser cannot obtain IP address.Locating problem: physical layer, data link layer, network layer.Solving problem:[User]:Check the IP configuration of the computer.Check the Physical connection between computer and modem, modem and the phone line;Check modem was configured correctly;

DHCP Service Troubleshooting[DSLAM]Check the EAD board state, and the ADSL line state;Check the connection between DLSAM and BAS;Check the vpi/vci of the ADSL port;Check the VLAN configuration in DSLAM;[BAS]Check the service configuration.If the external DHCP is used, check the DHCP server is working normally and reachable.

DHCP Service Troubleshooting[External equipment]Make sure the configuration in DHCP server is correct.

DHCP Service TroubleshootingLow speed.Same as PPPoE service.