%SW_VLAN-4-IFS_FAILURE

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%SW_VLAN-4-IFS_FAILURE

While preparing my lab in GNS3 using the 3725 L3 switch, i encountered the following error message:

" *Mar  1 00:18:57.371: %SW_VLAN-4-IFS_FAILURE: VLAN manager encountered file operation error: call = ifs_write_until / code = 0 (Unknown error 0)
    / bytes transfered = -1"

This message means that the VLAN manager received an unexpected error return from an IOS file system (IFS) call while reading the VLAN database. The first [chars] is the name of the function call, and the second [chars] is the filename. [dec] is the error code, the third [chars] is the textual interpretation of the error code, and the second [dec] is the number of bytes transferred. 

so the problems seems to be with the corrupted vlan.dat file. We need to delete the vlan.dat file and then reload the switch.

R2#delete vlan.dat
Delete filename [vlan.dat]?  y

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