Out of curiosity (I have no intention to run a Cisco as an IPIP gateway): Did you write a script that finds the minimum config changes to go from one encap file version to the next? (that is, change existing tunnel endpoint addresses, delete tunnel interfaces, add new tunnel interfaces, delete routes, add routes) Or do you generate a fresh config from the encap you downloaded and just reload the router from that? And, how often do you download the encap and update the router config? Rob