H3C Technologies H3C S5120 Series Switches - Manual (Page 668)

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When using the mac-address command to add a MAC address entry, the interface specified by the
interface keyword must belong to the VLAN specified by the vlan keyword, and the VLAN must already
exist. Otherwise, you will fail to add this MAC address entry.
Follow these steps to add, modify, or remove entries in the MAC address table on an interface:
To do… Use the command… Remarks
Enter system view system-view —
Enter interface view
interface interface-type
interface-number
—
Add/modify MAC address
entries under the specified
interface view mac-address { dynamic |
static } mac-address vlan
vlan-id
Required
When using the mac-address command to add a MAC address entry, the current interface must
belong to the VLAN specified by the vlan keyword, and the VLAN must already exist. Otherwise, you
will fail to add this MAC address entry.
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outdated entries, exhaust the MAC address table resources, and thus fail to update its entries to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… 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 by default.