Error exiting config-vlan mode 47: NV storage failure

While working a Cisco catalyst Switch like 2960s, 3550s etc especially during configuring VLANs, an “NV Storage failure” error is sometimes reported by some adinistrators. The precise eror code displayed is – Error exiting config-vlan mode 47: NV storage failure”. Infact,  many times such errors have been seen in Network simulators like GSN3 ,Dynamips  or recently EVE-NG. Here is the scenario (while configuring VLAN) which led to the error display –

Switch(config-vlan)#vlan 20

%Error exiting config-vlan mode 47: NV storage failure


On this error is received,


Step 1 :

Delete VLAN.dat file

delete flash:vlan.dat

Delete filename [vlan.dat]?

Delete flash:vlan.dat? [confirm]


Step 2 :

Reboot the Switch and onfigure VLANs

After the switch comes back up, you will need to reconfigure the VLANs you need.

Still if the user sees the same error after steps 1 and 2, then it is time to replace the Flash memeory on the switch. FLASH memory mo many times that it has lived out its life and it is beginning to fail.



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