Configuring The Aging Timer For Dynamic Mac Address Entries - 3Com S7906E Configuration Manual

Disabling MAC address learning on a VLAN
You may disable MAC address learning on a per-VLAN basis.
Follow these steps to disable MAC address learning on a VLAN:
To do...
Enter system view
Enable global MAC address
learning
Enter VLAN view
Disable MAC address learning
on the VLAN
When global MAC address learning is disabled, the learned MAC addresses remain valid until they age
out.

Configuring the Aging Timer for Dynamic MAC Address Entries

The MAC address table on your device is available with an aging mechanism for dynamic entries. In this
way, dynamic MAC address entries that are not updated within their aging time will be deleted to make
room for new entries, and the MAC address table can be timely updated to accommodate the latest
network changes.
Set the aging timer appropriately: a long aging interval may cause the MAC address table to retain
outdated entries, exhaust the MAC address table resources, and thus fail to update its entries to
accommodate the latest network changes; a short interval may result in the removal of valid entries and
hence unnecessary broadcasts, which may affect device performance.
Follow these steps to configure the aging timer for dynamic MAC address entries:
To do...
Enter system view
Configure the aging timer for
dynamic MAC address entries
Use the command...
system-view
undo mac-address
mac-learning disable
vlan vlan-id
mac-address mac-learning
disable
Use the command...
system-view
mac-address timer { aging
seconds | no-aging }
1-6
Remarks
—
Optional
Enabled by default
—
Required
Enabled by default
Remarks
—
Optional
300 seconds by default.