How can I create Vlans when I upload a new startup-config?

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Apr 29th, 2008

I need to create vlans on a router via a new startup-config file. Anyone know the syntax?

I have this problem too.
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william.caban Tue, 04/29/2008 - 20:27

It will all depend on your actual router and modules.

If it is a switch+router you will either have the "vlan database" exec option or the "vlan XYZ" config option.

! Old style

vlan database

vlan 100



show vlan-switch


! New Style

config t

vlan 100


show vlan


If it is a pure router, most probably, you will have to define the vlans "indirectly" using subinterfaces. (Note: If you don't define a native VLAN then, VLAN 1 will be assumed).


interface Ethernet0

description Physical Interface


interface Ethernet0.50

description Interface for VLAN 50 (native)

encapsualtion dot1Q 50 native


interface Ethernet0.100

description Interface for VLAN 100

encapsulation dot1Q 100




/rate post if it helps

jay77jay77 Tue, 04/29/2008 - 22:20


I have this experience - even if you dont create vlan using vlan database or conf t - vlan x command - eg. in c2811 with HWIC-4ESW, if i simply make one of the HWIC port as switch port access vlan xx and create interface vlanxx. I can assign ip address to the Vlanxx and use it as a layer 3 port. So in this what is the purpose of creating vlan with vlan database or conf t command?




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