3Com S7906E Configuration Manual page 2435

To do...
Disable global MAC address
learning
When global MAC address learning is disabled, the learned MAC addresses remain valid until they age
out.
Disabling MAC address learning on ports
After enabling global MAC address learning, you may 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 a port or port group:
To do...
Enter system view
Enable global MAC address
learning
Enter Ethernet
interface view
Enter
Ethernet
interface
Enter port
view, port
group view
group view,
or Layer 2
aggregate
interface
Enter Layer 2
view
aggregate
interface view
Disable MAC address learning
on an Ethernet port or port
group
When global MAC address learning is disabled, the learned MAC addresses remain valid until they
age out.
For configuration about port groups, refer to Ethernet Interface Configuration in the Access
Volume.
Use the command...
mac-address mac-learning
disable
Use the command...
system-view
undo mac-address
mac-learning disable
interface interface-type
interface-number
port-group manual
port-group-name
interface bridge-aggregation
interface-number
mac-address mac-learning
disable
1-5
Remarks
Required
Enabled by default.
Remarks
—
Optional
Enabled by default.
Required
Use any of the three
commands.
Configurations made in
Ethernet interface view or
Layer 2 aggregate interface
view take effect on the current
interface only; configurations
made in port group view take
effect on all the member ports
in the port group.
Required
Enabled by default.