H3C Technologies H3C S10500 Series Switches - Manual (Page 35)

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To do… Use the command… Remarks
Add or modify a dynamic or
static MAC address entry
mac-address { dynamic | static }
mac-address interface interface-type
interface-number vlan vlan-id
Add or modify a blackhole
MAC address entry mac-address blackhole mac-address vlan
vlan-id
Required
Use either command.
Ensure that you have created the
VLAN and assign the interface to
the VLAN.
Adding or modifying a static or dynamic MAC address table entry on an interface
Follow these steps to add or modify a static or dynamic MAC address table entry in interface view:
To do… Use the command… Remarks
Enter system view system-view —
Enter Layer 2 Ethernet
interface view or Layer 2
aggregate interface view
interface interface-type
interface-number
—
Add or modify a static or
dynamic MAC address entry mac-address { dynamic | static }
mac-address vlan vlan-id
Required
Ensure that you have created the VLAN
and assign the interface to the VLAN.
Disabling MAC address learning
Sometimes, you might need to disable MAC address learning to prevent the MAC address table from
being saturated, for example, when your device is being attacked by a large amount of packets with
different source MAC addresses.
Disabling global MAC address learning
Disabling global MAC address learning disables the learning function on all ports.
Follow these steps to disable MAC address learning:
To do… Use the command… Remarks
Enter system view system-view —
Disable global MAC address
learning
mac-address mac-learning disable
Required
Enabled by default.
NOTE:
When MAC address learning is disabled, the obtained MAC addresses remain valid until they age out.
Disabling MAC address learning on ports
After enabling global MAC address learning, you can disable the function on a single port, or on all
ports in a port group as needed.
Follow these steps to disable MAC address learning on an interface or a port group:
To do… Use the command… Remarks
Enter system view system-view —