On my SG200-26 switch (firmware version 184.108.40.206), I have changed the default VLAN from 1 to 20. I have removed every trace I can find of VLAN 1 in the switch's configuration, yet when I try to delete VLAN 1, I get this error:
"VLAN 1: VLAN can not be deleted because IP Interface or DHCP relay is defined on the VLAN.."
What else do I need to do to be able to delete VLAN 1?
I had the pleasure (sarcasm) of working on a S500 (similar to S200) switch Friday. It relies on VLAN1 for all of its "magic" and Smartport crap. It only has L3 functionality for VLAN1.
I ended up removing it a replacing it with a 3650 and I was done in 10 minutes.
Me tooo like to join my best friend Leo on this.
VLAN 1 is by default and this cannot be deleted on any catalyst switch.
As you can see from the other answers, you can't delete Vlan1. Having said that, I was wondering what you are trying to achieve? Or what is your concern?