show vlan security

show [ {vlan} vlan_name | vlan vlan_list] security


Displays the MAC limit-learning and lock-learning information for the specified VLAN.

Syntax Description

vlan_name Specifies a VLAN name.
vlan_list Specifies a VLAN list of IDs.



Usage Guidelines

The switch displays the following information:
  • Port—Indicates the port on which the MAC address has been learned.
  • Limit—Indicates that there is either a limited or unlimited amount of learned entries.
  • State—Indicates that the current FDB entries for the port are permanent, no additional entries are learned, or that the port allows unlimited, dynamic learning.
  • Learned—Specifies the number of learned entries.
  • Blackholed—Specifies the number of blackholed entries.
  • Locked—Specifies the number of locked entries.


The following sample output displays the security setting of the DHCP server for the VLAN blue:

#show vlan blue security
Port      Limit     State     Learned     Blackholed  Locked
24        Unlimited Unlocked  0           0           0


This command was first available in ExtremeXOS 11.1.

The vlan_list variable was added in ExtremeXOS 16.1.

Platform Availability

This command is available on ExtremeSwitching X435, X440-G2, X450-G2, X460-G2, X465, X590, X620, and X695 series switches.