Hello. I have some routers installed on some branch offices. I have access to them through ssh. I have created a new configuration that i want to install on all of them. The old configuration has to be erased. How can i do that without using erase start and rebooting because that will leave me without ssh access? I want the new config to replace the old one keeping none of the old stuff. Is restoring through ftp going to do what i want? Thanks a lot in advance.
"Configure replace" is the way to go. Also, if you are worried about ssh you should enable telnet temporarily. Enabling config manipulation and router reloads via snmp (v3 if possible) is also a good idea.
To avoid such worries in the future I highly recommend provisioning out of band access (Modem and phone line) to your remote routers.