Junos® OS Ethernet Interfaces Configuration ... - Juniper Networks

mac-learn-enable
Syntax (mac-learn-enable | no-mac-learn-enable);
Hierarchy Level [edit interfaces interface-name gigether-options ethernet-switch-profile]
Release Information Statement introduced before Junos OS Release 7.4.
Description For Gigabit Ethernet IQ and Gigabit Ethernet PICs with SFPs (except the 10-port Gigabit
Required Privilege
Level
Related
Documentation
Copyright © 2012, Juniper Networks, Inc.
Ethernet PIC and the built-in Gigabit Ethernet port on the M7i router), and for Gigabit
Ethernet DPCs on MX Series routers, configure whether source and destination MAC
addresses are dynamically learned:
• mac-learn-enable—Allow the interface to dynamically learn source and destination
MAC addresses.
• no-mac-learn-enable—Prohibit the interface from dynamically learning source and
destination MAC addresses.
MAC address learning is based on source addresses. You can start accounting for traffic
after there has been traffic sent from the MAC address. Once the MAC address is learned,
the frames and bytes transmitted to or received from the MAC address can be tracked.
NOTE: When you gather interfaces into a bridge domain, the
no-mac-learn-enable statement at the [edit interfaces interface-name
gigether-options ethernet-switch-profile] hierarchy level is not supported. You
must use the no-mac-learning statement at the [edit bridge-domains
bridge-domain-name bridge-options interface interface-name] hierarchy level
to disable MAC learning on an interface in a bridge domain. For information
on disabling MAC learning for a bridge domain, see MX Series Layer 2
Configuration Guide.
interface—To view this statement in the configuration.
interface-control—To add this statement to the configuration.
• Configuring MAC Address Filtering on page 321
Chapter 34: Summary of Ethernet Interfaces Configuration Statements
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