CCNP2v5.0-HH.pptVIP

Implementing Secure Converged Wide Area Networks (ISCW) Module 2: Teleworker Connectivity Module 2: Teleworker Connectivity Lesson 2.7: Verifying Broadband ASDL Configurations Objectives Describe and implement a bottom up troubleshooting technique for ADSL. Determining the Layer to Troubleshoot Determine Whether the Router Is Properly Trained to the DSLAM Displays information specific to the ADSL for a specified ATM interface Troubleshooting Layer 1 Issues Router is not properly trained. Check the ADSL_CD light: ADSL_CD light is on: Proceed to Layer 2 troubleshooting ADSL_CD light is off: Continue with Layer 1 troubleshooting Check whether the DSL (ATM) port on the Cisco router is plugged into the wall jack; if not, connect the port to the wall jack with a standard telephone cable (4-pin or 6-pin RJ-11 cable). Check if cable pinouts are correct. Replace any faulty cable. Verify with your service provider that DSL service has been enabled. Troubleshooting Layer 1: Is the ATM Interface in an Administratively Down State? ATM interface is administratively disabled. Troubleshooting Layer 1: Is the DSL Operating Mode Correct? Check the DSL modulation type used with the service provider. If modulation is not known, use the default auto operating mode for autodetection. Troubleshooting Layer 2 Issues Verify that a PVC is in use with the ping atm interface atm command. Layer 2 Troubleshooting: Is Data Being Received from the ISP? router#show?interfaces?atm 0 ATM0?is?up,?line?protocol?is?up ??Hardware?is?DSLSAR?(with?Alcatel?ADSL?Module) ??MTU?4470?bytes,?sub?MTU?4470,?BW?128?Kbit,?DLY?1600?usec,? ?????reliability?255/255,?txload?1/255,?rxload?1/255 ??Encapsulation?ATM,?loopback?not?set ??Keepalive?not?supported ??Encapsulation(s):AAL5,?PVC?mode ??24?maximum?active?VCs, 256 VCS per VP,?1?current?VCCs ??VC?idle?disconnect?time:300?seconds ??Last?input?01:16:31,?output?01:16:31,?output?hang?never ??Last?clearing?of?show?interface?counters?never ??Input?queue:0/75/0?(size/max/dr