Mac-Limit - Juniper JUNOS OS 10.3 - SOFTWARE Manual

Complete Software Guide for Junos

mac-limit

Syntax
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Release Information
Description
Default
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Related
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1450
®
OS for EX Series Ethernet Switches, Release 10.3
mac-limit number;
[edit vlans vlan-name]
Statement introduced in Junos OS Release 9.0 for EX Series switches.
Configure the number of MAC addresses allowed on a VLAN.
The number of MAC addresses allowed per VLAN varies between EX switches. The output
of the set vlans vlan-name mac-limit ?
on your EX switch.
MAC limit is disabled.
number—Maximum number of MAC addresses.
Range: 1 through 32768.
NOTE: Do not set the mac-limit to 1. The first learned MAC address is often
inserted into the forwarding database automatically (for instance, for Routed
VLAN Interfaces the first MAC address inserted into the forwarding database
is the MAC address of the RVI. For Aggregated Ethernet bundles using LACP,
the first MAC address inserted into the forwarding database in the forwarding
table is the source address of the protocol packet). The switch will therefore
not learn MAC addresses other than the automatic addresses when the
mac-limit is set to 1, and this will cause problems with MAC learning and
forwarding.
routing—To view this statement in the configuration.
routing-control—To add this statement to the configuration.
show vlans on page 1507
Example: Setting Up Basic Bridging and a VLAN for an EX Series Switch on page 1305
Configuring MAC Table Aging (CLI Procedure) on page 1381
Understanding Bridging and VLANs on EX Series Switches on page 1283
provides the number of MAC addresses allowed
Copyright © 2010, Juniper Networks, Inc.