After delete VLAN.dat file unable to create VLAN

[tashen]

Hi all,

unfortunately, I deleted the VLAN.dat file. Therefore, the interface of the default vlan does not show anything. I tried following steps,

1. Switch reset

2. Tried to install IOS

3. Tried various commands

Unfortunately, I can't fix it. How can I fix it?

Switch Model: Catalyst 3750 v2

Thanks...

[Martin L]

unfortunately I don't think there is a way to retrieve vlans now if u do not have any vlan listed in configs; check show running or show start-up, di u have any vlans listed ?  Note that VTP transparent mode stores vlans in config file whereas other VTP modes store info in VLAN.dat

check your switch flash; are there any old or backup files?

Regards, ML
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[MHM Cisco World]

I think you need to access other same models SW copy vlan files to tftp and from there copy to this SW.

You can try using vtp but I dont think it work since the files name under director is deleted.

[MHM Cisco World]

https://www.cisco.com/c/en/us/support/docs/switches/catalyst-2940-series-switches/109304-manage-vlandat.html

Check this link

[Leo Laohoo]

copy flash:config.old start

And then reboot the switch.

[Martin L]

you have old configuration file saved on flash; config.old - u may be able to retrieve some vlans.  it is not the same as vlan.dat file but it is something.  also check file named private.old config (open to read text file)

Regards, ML
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