Brocade Converged Enhanced Ethernet Administrator's Guide v6.1.2_cee (53-1001258-01, June 2009)

36 Converged Enhanced Ethernet Administrator’s Guide
53-1001258-01
Configuring the MAC address table
3
Configuring the MAC address table
In this section:
•Specifying an aging time or disabling the aging time for MAC addresses. . 36
•Adding static addresses to the MAC address table. . . . . . . . . . . . . . . . . . . . 37
•Clearing dynamically learned MAC addresses. . . . . . . . . . . . . . . . . . . . . . . . 37
•Displaying MAC address table entries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Each CEE port has a MAC address table. The MAC address table stores a number of unicast and
multicast address entries without flooding any frames. The Brocade 8000 CEE switch has a
configurable aging timer. If a MAC address remains inactive for a specified number of seconds, it is
removed from the address table. For detailed information on how the switch handles MAC
addresses in a Layer 2 Ethernet environment, see “Layer 2 Ethernet overview” on page 5.
Specifying an aging time or disabling the aging time for MAC addresses
Use this command to set the length of time that a dynamic entry remains in the MAC address table
after the entry is used or updated. Static address entries are never aged or removed from the table.
The command is also used to disable the aging time.
To specify an aging time or disable the aging time for MAC addresses, perform the following steps
from Privileged EXEC mode:
Step Task Command
1. Enter global configuration mode. switch#config t
Enter configuration commands, one per
line. End with CNTL/Z.
switch(config)#
2. Specify an aging time for MAC addresses.
The range is 10 through 100000 seconds.
The default is 300 seconds.
switch(config)#mac-address-table aging-time
{disable_aging | aging-time_in_seconds}
To disable the aging time for MAC addresses,
enter a “0.”
3. Display the MAC address table aging-time
configuration.
switch(config)#do show mac address-table aging-time