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Forwarding Database

ExtremeWare XOS 11.3 Concepts Guide

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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 the entry for a particular MAC address.

● netlogin—Displays all FDBs created as a result of the netlogin process: you can display all of these

entries or just the netlogin MAC-based VLAN FDB entries.

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