I'm sorry, but IPv4 DHCP was a wonderful solution to many issues, which are very very difficult in IPv6. RA is a solution looking for an actual problem. That being said, I like having the option of RA, but it is only useful in a very small subset of use cases, many it actually causes issues, instead of solving them. Not all devices are client computers, and it is *MUCH* harder to build scripting to determine what config options are specific to a network for a portable device like a SIP phone, than to simply add the options into DHCP. As it stands, IPv6 is a complete non starter to about half of my customer's VLANs due to the above. The best comment I've seen goes something like this: "We don't run RIP w/ a default route on our routers now for a reason, why do you suddenly think now it's a good idea, and willfully/ignorantly ignore the past 15 years" -Blake