3Com MSR 50, MSR 30 Mac-address timer aging seconds no-aging, Undo mac-address timer aging

2483

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	address table to retain outdated entries and fail to accommodate latest network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