Forwarding Database Maintenance; Debugging Options - HP 445860-B21 - 10Gb Ethernet BL-c Switch Reference Manual

Forwarding Database maintenance

The Forwarding Database (FDB) Manipulation commands 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 commands.
FDB Manipulation commands
Table 181
Command
show mac-address-table
address {<MAC address>}
show mac-address-table port
{<port number>}
show mac-address-table vlan
{<1-4095>}
show mac-address-table
clear mac-address-table

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 HP technical support.
The following table describes the Miscellaneous Debug commands:
Miscellaneous Debug commands
Table 182
Command
debug mp-trace
Usage
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)
Command mode: All except User EXEC
Displays all FDB entries for a particular port.
Command mode: All except User EXEC
Displays all FDB entries on a single VLAN.
Command mode: All except User EXEC
Displays all entries in the Forwarding Database.
Command mode: All except User EXEC
Clears the entire Forwarding Database from switch memory, then adds the
static entries to the Forwarding Database.
Command mode: All except User EXEC
Usage
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
Maintenance Commands
193