Configuring The Fdb Aging Time; Clearing Fdb Entries; Displaying Fdb Entries - Extreme Networks ExtremeWare XOS Guide Manual

Forwarding Database

Configuring the FDB Aging Time

You configure the aging time for dynamic FDB entries using the following command:
configure fdb agingtime <seconds>
If the aging time is set to zero, all aging entries in the database are defined as static, nonaging entries.
This means the entries will not age out, but non-permanent static entries can be deleted if the switch is
reset. Supported aging is between 15 and 1,000,000 seconds. The default is 5 minutes (300 seconds).

Clearing FDB Entries

You clear dynamic and permanent entries using different CLI commands.
You clear dynamic FDB entries by targeting:
specified MAC addresses
●
specified ports
●
specified VLANs,
●
all blackhole entries
●
Use the following command to clear dynamic entries from the FDB:
clear fdb {<mac_addr> | ports <port_list> | <vlan_name> | blackhole}
You clear permanent FDB entries by targeting:
all permanent entries
●
specified MAC addresses
●
specified VLANs
●
all blackholed entries
●
Use the following command to clear permanent entries from the FDB:
delete fdbentry [all | <mac_address> [vlan <vlan name>]

Displaying FDB Entries

To display FDB entries, use the following command:
show fdb {<mac_addr> {netlogin [all | mac-based]}| permanent {netlogin [all | mac-
based]} | ports <port_list> {netlogin [all | mac-based]}| vlan <vlan_name> {netlogin
[all | mac-based]} | stats | netlogin {all | mac-based]}}
where the following is true:
●
mac_address
—Displays all FDBs created as a result of the netlogin process: you can display all of these
●
netlogin
entries or just the netlogin MAC-based VLAN FDB entries.
252
—Displays the entry for a particular MAC address.
ExtremeWare XOS 11.3 Concepts Guide