Command: /maint/fdb
[FDB Manipulation Menu] |
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find | - Show a single FDB entry by MAC address | |
port | - Show FDB | entries for a single port |
vlan | - Show FDB | entries for a single VLAN |
dump | - Show all | FDB entries |
add | - Add a FDB entry | |
del | - Delete a | FDB entry |
clear | - Clear entire FDB, then | |
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The Forwarding Database (FDB) Manipulation Menu can be used to view information and to delete a MAC address from the Forwarding Database or clear the entire Forwarding Database. This is helpful in identifying problems associated with MAC address learning and packet forwarding decisions.
The following table describes the FDB Manipulation Menu options.
Table 87 FDB Manipulation Menu options
Command | Usage |
find <MAC address> | Displays a single database entry by its MAC address. You are prompted |
| to enter the MAC address of the device. Enter the MAC address using |
| one of the following: |
| • xx:xx:xx:xx:xx:xx format (for example: 08:00:20:12:34:56) |
| • xxxxxxxxxxxx format (for example: 080020123456). |
port <port number> | Displays all FDB entries for a particular port. |
vlan | Displays all FDB entries on a single VLAN. |
dump | Displays all entries in the Forwarding Database. |
add | Adds a FDB entry. |
rem | Removes a FDB entry. |
clear | Clears the entire Forwarding Database from switch memory, then adds |
| the static entries to the Forwarding Database. |
Command: /maint/debug
[Miscellaneous Debug | Menu] | ||
tbuf | - Show | MP trace buffer | |
snap | - | Show | MP snap (or |
clrcfg | - | Clear all flash configs | |
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The Miscellaneous Debug Menu displays trace buffer information about events that can be helpful in understanding switch operation. You can view the following information using the Debug Menu:
•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 Menu options:
Table 88 Miscellaneous Debug Menu options
Command | Usage |
tbuf | 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. |
snap | Displays the management processor snap (or |
| information traced at the time that a reset occurred. |
clrcfg | Deletes all flash configuration blocks. The next time the switch is rebooted, it returns to the factory |
| default settings. |
Command Line Interface 87