I'm unable to configure "vtp mode transparent" on a Cisco 3548-XL switch. It's using IOS c3500XL-c3h2s-mz.120-5.WC3b.bin. The only options under vtp is "file".
switch(config)# vtp ?
file
Please let me know if I have to upgrade the IOS or removing the vlan.dat file. This switch was not properly reset to manufacturer's default. I was given time to reset.
-Manny
