Debugging options
The Miscellaneous Debug commands display trace buffer information about events that can be helpful in understanding switch operation. You can view the following information using Debug commands:
•Events traced by the management processor (MP)
•Events traced to a buffer area when a reset occurs
If the switch resets for any reason, the management processor (MP) trace buffer is saved into the snap trace buffer area. The output from these commands can be interpreted by NEC technical support.
The following table describes the Miscellaneous Debug commands:
Table 114 Miscellaneous Debug commands
Command | Usage |
debug | Displays the management processor trace buffer. Header information similar to the |
| following is shown: |
| MP trace buffer at 13:28:15 Fri May 25, 2002; mask: 0x2ffdf748 |
| The buffer information is displayed after the header. |
| Command mode: All except User EXEC |
debug | Displays the management processor snap (or |
| contains information traced at the time that a reset occurred. |
| Command mode: All except User EXEC |
clear | Deletes all flash configuration blocks. The next time the switch is rebooted, it returns to the |
| factory default settings. |
| Command mode: All except User EXEC |
ARP cache maintenance
The following table describes the Address Resolution Protocol commands:
Table 115 ARP Maintenance commands
Command | Usage | |
show ip arp find <IP address> | Shows a single ARP entry by IP address. | |
| Command mode: All except User EXEC | |
show ip arp interface <port number> | Shows ARP entries on a single port. | |
| Command mode: All except User EXEC | |
show ip arp vlan | Shows ARP entries on a single VLAN. | |
| Command mode: All except User EXEC | |
show ip arp reply | Shows the list of IP addresses that the switch will respond | |
| to for ARP requests. | |
| Command mode: All except User EXEC | |
show ip arp | Shows all ARP entries. | |
| Command mode: All except User EXEC | |
clear ip | Clears the entire ARP list from switch memory. | |
| Command mode: All except User EXEC | |
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NOTE: To display all ARP entries currently held in the switch, or a portion according to one of the commands listed above, see the “ARP information” section of the “Information Commands” chapter.
Maintenance Commands 97
