Troubleshooting guide

Enable debugging on the router.3.

Router#debug atm events

ATM events debugging is on

Router#

2d18h:

2d18h: RX interrupt: conid = 0, rxBd = 0x80C7EF74 length=52

2d18h: Data Cell received on vpi = 8 vci = 35

!−−− Your VPI/VCI.

2d18h:

2d18h: RX interrupt: conid = 0, rxBd = 0x80C7EEC0 length=52

2d18h: Data Cell received on vpi = 8 vci = 35

2d18h:

2d18h: RX interrupt: conid = 0, rxBd = 0x80C7EECC length=52

2d18h: Data Cell received on vpi = 8 vci = 35

2d18h:

2d18h: RX interrupt: conid = 0, rxBd = 0x80C7EED8 length=52

2d18h: Data Cell received on vpi = 8 vci = 35

Make sure you have debug ATM events running on the Cisco DSL Router, and then go to a working

Internet connection and begin to ping the IP address your ISP statically assigned to you.

It does not matter whether you have configured this IP address on the Cisco DSL Router. What is

important is that your ATM interface is up/up and that you are pinging the IP address your ISP gave

you. If you don't see the expected output after the ping test, contact your ISP for support.

Disable debugging on the router.

<< wait 60 seconds >>

Router#undebug all

!−−− Used to turn off the debug events.

All possible debugging has been turned off.

Verify your VPI/VCI values, and then make the necessary changes to your configuration.

If you do not see output during the 60 seconds of debugging, contact your ISP.

Can you ping the default gateway from your PC?

In a bridged environment, pinging the default gateway is a good test of connectivity. In general, if you can

ping to your default gateway, you know that Layer 1 and Layer 2 services are functioning properly. Open an

MS−DOS window and try to ping the default gateway.

C:\>ping 192.168.1.1

Pinging 192.168.1.1 with 32 bytes of data:

Reply from 192.168.1.1: bytes=32 time<10ms TTL=247

Ping statistics for 192.168.1.1:

Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),

Approximate round trip times in milli−seconds:

Minimum = 0ms, Maximum = 0ms, Average = 0ms

If your success rate is 80−100 percent, try to ping a valid Internet address (198.133.219.25 is

www.cisco.com). If you can ping the default gateway from the PC but you cannot ping another Internet

Cisco DSL Router Configuration and Troubleshooting Guide