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The default maximum number of MAC addresses that can be learned on a port
varies with devices. When the upper limit is reached, frames received with
unknown destination MAC addresses on a port are forwarded by default.
The command takes effect on the current port only when executed in interface
view.
Related command: mac-address (system view), mac-address (Ethernet interface view),
mac-address timer.
Example # Set the maximum number of MAC addresses that can be learned on port
Ethernet 1/0 to 600. After this upper limit is reached, frames received with
unknown destination MAC addresses on the port will not be forwarded.
<Sysname> system-view
[Sysname] interface ethernet 1/0
[Sysname-Ethernet1/0] mac-address max-mac-count 600
[Sysname-Ethernet1/0] mac-address max-mac-count disable-forwarding
mac-address timer
Syntax mac-address timer { aging seconds | no-aging }
undo mac-address timer aging
View System view
Parameter aging seconds: Sets a aging time for dynamic MAC address entries, in the range
10 to 4080 seconds.
no-aging: Sets dynamic MAC address entries not to age.
Description Use the
mac-address timer command to configure the aging timer for dynamic
MAC address entries.
Use the
undo mac-address timer command to restore the default value.
By default the aging timer for dynamic MAC address entries is 300 seconds.
Set the aging timer appropriately: a long aging interval may cause the MAC
address table to retain outdated entries and fail to accommodate latest network
changes; a short interval may result in removal of valid entries and hence
unnecessary broadcasts which may affect device performance.
Example # Set the aging timer for dynamic MAC address entries to 500 seconds.
<Sysname> system-view
[Sysname] mac-address timer aging 500