| Show controllers Ethernet [interface number] |
To display statistics like missing datagrams, memory errors, buffer errors, and overflow errors for an Ethernet interface on a Cisco router (Please note this command will not give you information on internal hardware errors) |
| Show flash |
To display the router images stored in NVRAM |
| Show buffers |
To display statistics for the buffer pools in router (Please note that the router has one pool of queuing elements and five pools of packet buffers of different sizes. Network server keeps counts of the number of buffers outstanding, the number of buffers in the free list, and the maximum number of buffers allowed in the free list for each pool) |
| Show processes |
To display information about the active processes in a router |
| Show tech-support |
To show tech support router conditions |
| Show version |
To show current status of router |
| Debug ip rip |
To check if RIP routing is operating properly |
| Show ip route |
To display the entries in the routing table |
| Show version |
To obtain a router’s firmware version |
| Show running-config |
To obtain a router’s current configuration |
| Show interface fddi 3/0 |
To display an upstream neighbor value of 0000 0000 0000 for FDDI (Keep in mind that 0000 0000 0000 means the upstream neighbor is unknown, indicating that a physical problem is likely to have occurred) |
| Debug isdn q921 / debug isdn q931 |
To troubleshoot ISDN BRI layer 2 and 3 |
| Show controller bri |
To view information specifically about the D channel of a BRI line |
| Logging console level |
To send debugging output to the consol |
| Show frame-relay |
To obtain statistics about a PVC (Permanent Virtual Circuit) on all Frame Relay interfaces |