> Jeroen Massar wrote: > Thanks Michel for listing the things that I once forgot too. Let me guess: until you actually had to renumber a large one :-) with a flag day maybe :-D In my experience, the pain is not with your own network but with external partners such as supply chain and distribution. When these partners are large corporations or governments it's really fun to make the banana eaters in their NOCs change their access-lists and firewall configs. Michel.