Good evening.
We had this happen when we reloaded a router at an active site after a dhcp issue, and we are in the process of bring up a new site and figured we would try it on a fresh router without any risk of bringing a customer down.
We loaded the router with 1.7, as this is the production firmware we are running across all routers in our network presently. Completed config, ospf is working everything is behaving as expected. Backup config and then loaded 1.8.5. As soon as router reboots, it is no longer accessible. From the next router in line, i can ping public interface of new router, but cannot do anything else(This most likely due to firewall rules we have in place). Router is online, but ospf is no longer working. It is no longer listed as a registered neighbor and in fact appears that ospf is turned off as a whole.
Last time we did this on the production router, it was available locally but ospf did not work. It appears this is the case here as well. Any help would be greatly appreciated as we need to upgrade our entire infrastructure to take advantage of the MPLS configurations for an upcoming project for a customer. Thank you in advance!
