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2482 CHAPTER 165: MAC ADDRESS TABLE MANAGEMENT CONFIGURATION COMMANDS
■ 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 command: display mac-address mac-learning.
Example # Disable global MAC address learning.
<Sysname> system-view
[Sysname] mac-address mac-learning disable
# Disable MAC address learning on the interface Ethernet 1/0.
<Sysname> system-view
[Sysname] interface ethernet 1/0
[Sysname-Ethernet1/0] mac-address mac-learning disable
mac-address max-mac-count (Ethernet interface view)
Syntax mac-address max-mac-count { count | disable-forwarding }
undo mac-address max-mac-count [ disable-forwarding ]
View Ethernet interface view, aggregation port group view
Parameter count: Maximum number of MAC addresses that can be learned on a port. When
the argument takes 0, the VLAN is not allowed to learn MAC addresses. The value
range for this argument varies with devices.
disable-forwarding: Disables forwarding of frames with unknown destination
MAC addresses after the number of learned MAC addresses reaches the upper
limit.
Description Use the
mac-address max-mac-count count command to configure the
maximum number of MAC addresses that can be learned on an Ethernet port.
Use the
mac-address max-mac-count disable-forwarding command to
configure whether forwarding frames with unknown destination MAC addresses
is allowed after the number of learned MAC addresses reaches the upper limit.
Use the
undo mac-address max-mac-count command to restore the default
maximum number of MAC addresses that can be learned on an Ethernet port.
Use the
undo mac-address max-mac-count disable-forwarding command
to allow forwarding frames received on an Ethernet port with unknown
destination MAC addresses after the number of learned MAC addresses reached
the upper limit.