|  | 5.6 | Dial-on-Demand Routing
| 5.6.3 | Write IOS commands pertaining to troubleshooting DDR operation

The commands shown in Figure can be used to troubleshoot DDR operation. You troubleshoot SPID problems by using the debug isdn q921 command. In example output, you can see that isdn spid1 was rejected by the ISDN switch. You check the status of the Cisco 700 ISDN line with the show status command, as shown in Figure .
| Web Links
| Dial on Demand Routing
| Troubleshooting ISDN