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The VLAN interface is down, even though the "no shutdown" command is issued on the Cisco Catalyst 4500 series switch

Core issue

These are the requirements for the VLAN interface to be up/up:

  • The VLAN must exist in the VLAN database and must be active.
  • At least one port must be assigned to the VLAN.
  • The VLAN must contain an active device.

Resolution

For information on how to configure layer 3 interfaces on a Cisco Catalyst 4500 series switch, refer to Configuring Layer 3 Interfaces.

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