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The VLAN goes to the administratively down state if two or more VLANs are configured

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Introduction

The VLAN goes to the administratively down state if two or more VLANs are configured in the Cisco Catalyst 2940, 2950, 2900XL and 3500XL Series switches.

Core issue

In a Cisco Catalyst 2950, 2900XL or 3500XL switch, if an IP address is assigned to the VLAN interface in addition to the default VLAN, the new VLAN goes into UP/UP state when the no shutdown command is issued. However, the original VLAN goes into  the administratively down state.

Hence, these switches can have only one active management interface at a time.

Resolution

The Cisco Catalyst 2940, 2950, 2900XL, and 3500XL Series switches are Layer 2 (L2) switches that can support only one Switch Virtual Interface (SVI) in the UP state at any one time. If additional VLANs are created, they can pass traffic without any issues. However, the SVI for new VLANs will not be UP. This is simply a hardware limitation.

Reference

Comments
vinalsha
Beginner
Thanks for the info.
JM3
Beginner
Beginner

Thank you !

anton1688
Beginner

 

 

bob
Community Member

Here is a you tube video that shows how to bring more than one vlan up at a time on a 2960. https://www.youtube.com/watch?v=HQsQkwTwB0M

 

shubhamkumarhcl
Beginner

http://www.ccnaccnplinux.com

http://www.ccnaccnplinux.com/2015/01/vlan-and-inter-vlan-configuration.html

if You visit i am sure you will get useful information

Vlan and Inter-Vlan Configuration

Refer to the above scenario how intervlan routing works

Here vlan 10 is able to communicate with vlan 20 The entire intervlan routing is configured with the help of l2 switch and a router.

chintalamuniraju
Beginner

Thank you !