VLAN Number on Cisco 3750

[jakskal07]

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

[mohammedmahmoud]

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]

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

[royalblues]

Vlans greater than 1005 are extended vlans and you cannot configure them if the device is configuredas vtp server

Try changing your VTP mode to transparent and check again

http://www.cisco.com/en/US/docs/switches/lan/catalyst3550/software/release/12.1_13_ea1/configuration/guide/swvlan.html#wp1200242

HTH, rate if it does

Narayan

[mohammedmahmoud]

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]

You are absolutely right my friend

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

Narayan

[jakskal07]

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