Every interface can have 1 or more IPv6 IP's. Link-local and N number of others, where N is 0 or more. What kind of tweaks have you required in your deployment

Every interface can have 1 or more IPv6 IP's. Link-local and N number of others, where N is 0 or more. What kind of tweaks have you required in your deployments because of this? DSR is a special use case, and with each interface having a link-local address means you don't need to provide globally unique addresses, because the source/destination specify their route explicitly, each hop can use their link-local address. DSR would also require modification if it was using an extended version of IPv4...