Mac-Address Max-Mac-Count - 3Com S7906E Command Reference Manual

Parameters
None
Description
Use the mac-address mac-learning disable command to disable MAC address learning globally, on
one or a group of Ethernet ports, or on a Layer-2 aggregate interface, depending on the view you
entered.
Use the undo mac-address mac-learning disable command to enable MAC address learning globally,
on one or a group of Ethernet ports, or on a VLAN, depending on the view you entered.
By default, MAC address learning is enabled globally and on all Ethernet ports.
Note that:
You may need to disable MAC address learning sometimes to prevent the MAC address table from
being saturated, for example, when your device is being attacked by a great deal of packets with
different source MAC addresses. This somewhat affects update of the MAC address table.
As disabling MAC address learning may result in broadcast storms, you need to enable broadcast
storm suppression after you disable MAC address learning on a port.
Related commands: display mac-address mac-learning.
When MAC address learning is disabled, the learned MAC addresses remain valid until they age out.
Examples
# Disable global MAC address learning.
<Sysname> system-view
[Sysname] mac-address mac-learning disable
# Disable MAC address learning on port GigabitEthernet 2/0/1.
<Sysname> system-view
[Sysname] interface gigabitethernet 2/0/1
[Sysname-GigabitEthernet2/0/1] mac-address mac-learning disable

mac-address max-mac-count

Syntax
mac-address max-mac-count count
undo mac-address max-mac-count
View
Ethernet interface view, port group view
Default Level
2: System level
1-6