VLAN Number on Cisco 3750

Unanswered Question
Jul 31st, 2007

Hello,

Now i'm using 3750, with IOS c3750-advipservicesk9-mz.122-35.SE2.bin and c3750-i9-mz.122-20.SE4/c3750-i9-mz.122-20.SE4.bin. But i can't create VLAN number more than 1005.

Switch#vlan database

Switch(vlan)#vlan ?

<1-1005> ISL VLAN index

Your help is very appreciated. Thank you.

Reza

I have this problem too.
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mohammedmahmoud Tue, 07/31/2007 - 04:24

Hi,

In vlan database mode, yes this is the constrain (Only normal-range (VLANs 1-1005) VLANs can be configured in this mode), to use more vlans (extended-range VLANs 1006-4094) you'll need to add them using global configuration.

HTH,

Mohammed Mahmoud.

graemeporter Tue, 07/31/2007 - 04:26

Hi Reza,

On the newer IOS switches, such as the 3750s, it's not recommended to use the VLAN database section to configure your VLANs; these should be configured in global config mode, and are created just by typing "vlan ".

e.g. :-

_________________________________

switch(config)#vlan ?

WORD ISL VLAN IDs 1-4094

access-map Create vlan access-map or enter vlan access-map command mode

dot1q dot1q parameters

filter Apply a VLAN Map

internal internal VLAN

_________________________________

You should be able to create up to 4094 VLANs in this mode.

Kind regards,

Graeme

mohammedmahmoud Tue, 07/31/2007 - 04:33

Hi Narayan,

Your comment about being a transparent switch is totally correct, but i think that even after the switch is converted into transparent you still need to configure extended vlans in global configuration mode and not in vlan database mode.

BR,

Mohammed Mahmoud.

royalblues Tue, 07/31/2007 - 04:43

You are absolutely right my friend

Under the vlan database mode, the maximum number available is 1005 :-)

Narayan

jakskal07 Tue, 07/31/2007 - 08:29

Thank you friends .. for your answer. But I can modify state of extended VLAN to "state active". So, when i type show vlan command, it didn't show vlan number more than 1005. Any clue for this ?

Thank you.

Reza

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