Create vlans in GNS3 using the NM16-SW switch module

If you are going to try the NM16-SW switch module in GNS3 you might find that the vlan commands are a bit different than what you are used to on real switches. For this module you still need to use the old vlan database method to configure vlans. Let me show you some examples and how to configure vlans.

First try to create a VLAN by using the following command:

vlan 10


Then see what happens when you use the show command to check your VLANS:

show vlan

Will give you the output:

% Ambiguous command:  "show vlan"

Hmm…annoying, that’s different on a real switch, let’s try something else:

show vlans

Which will give you:

No Virtual LANs configured.

Strange..I thought I just created that vlan. Now try the following command:

show vlan-switch

Which will give you:

VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
1    default                          active    Fa1/2, Fa1/3, Fa1/4, Fa1/5
                                                Fa1/6, Fa1/7, Fa1/8, Fa1/9
                                                Fa1/10, Fa1/11, Fa1/12, Fa1/13
                                                Fa1/14, Fa1/15
10   VLAN0010                         active    

That’s better! Just a small difference here but good to know the correct command.

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Written by René Molenaar - CCIE #41726

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About the Author: Rene Molenaar

René - CCIE #41726 is the creator of where he shares CCNA, CCNP and CCIE R&S labs. He also blogs about networking on

1 Comment

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