Hello, I have this error message on my c4507R: "The DHCP database could not be locked. Please retry the command later" Since I found out the all commands of dhcp disappeared from running-configuration, so I just wrote them again and it started work...

The device is consisted of WS-C4507R+E WS-X4748-SFP-E= x1 WS-X4748-RJ45-E= x1 WS-X45-SUP7L-E= x2 I'd appreciate your help.

We got a catalyst  WS-C4507R-E which has 2 supervisor engine WS-X45-SUP7L-E System(slot 3 and slot 4). I know that the supervisor engine that boots first, becomes the active supervisor engine.  But I'd like to boot up the sw with an active supervisor...