Thank you Rajesh for that demonstration. For a very short process there are a couple of trip hazards that I can see.
1. Cisco uses a variety of methods to reference the source tftp image location. With it in the default "Root" we are seeing simply ...
I have seen this response before with wr erase, try:
Edison's suggrestion first, then
erase nvram:startup-config
reload
NB: Do not save the running Config
Might be worth asking the service provider what Layer 2 MAC Address they have against your connection.Its not unheard of for the mac to stick You should ensure your mac address table is cleared also for assured connection.Another cause of this could ...