Configuring MAC Address Table Management 175
n
Do not configure a static or dynamic MAC address entry on an aggregation port.
Configuring MAC
Address Aging Timer
The MAC address table on your device is available with an aging mechanism for
dynamic entries to prevent its resources from being exhausted. Set the aging timer
appropriately: a long aging interval may cause the MAC address table to retain
outdated entries and fail to accommodate latest network changes; a short interval
may result in removal of valid entries and hence unnecessary broadcasts which
may affect device performance.
Follow these steps to configure the MAC address aging timer:
n
The MAC address aging timer takes effect globally on dynamic MAC address
entries (learned or administratively configured) only.
Configuring the
Maximum Number of
MAC Addresses an
Ethernet Port or a Port
Group Can Learn
To prevent a MAC address table from getting so large that it may degrade
forwarding performance, you may restrict the number of MAC addresses that can
be learned. One approach is to do this on a per-port or port group basis.
Follow these steps to configure the maximum number of MAC addresses that an
Ethernet port or port group can learn:
To do… Use the command… Remarks
Enter system view system-view -
Configure the aging timer for
dynamic MAC address entries
mac-address timer { aging
seconds | no-aging }
Optional
300 seconds by default.
To do… Use the command… Remarks
Enter system view system-view -
Enter
Ethernet
port or
port group
view
Enter Ethernet port
view
interface interface-type
interface-number
Required
Use either command to
configure on a port or ports
in a group.
Enter port group
view
port-group { aggregation
agg-id | manual
port-group-name }
Configure the maximum
number of MAC addresses that
can be learned on an Ethernet
port or port group.
mac-address
max-mac-count count
Required
The maximum number of
MAC addresses that can be
learned on a port or port
group is not configured by
default.
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