On 6/5/07, Roger Marquis <[EMAIL PROTECTED]> wrote:
Are you proposing that every company use publicly routable address space? How about the ones that don't qualify for a /19 and so are dependent on addresses owned by their upstream?
This discussion evolved from an IPv6 discussion, so there's plenty of address space for everybody in the assumptions, and you can have a /48 even if a /64 is overkill.
To change ISPs for example, would it be simpler to change the IP address of every node in the company or to run NAT on the gateways?
Unlike the security discussions, that's one area where NAT really does make life easier for medium-large companies (either 1-1 NAT or PNAT will do.) It lets you number your internal space as 10/8, regardless of what ISP or ISPs you're using externally, so if you have to change one of your ISPs, you don't have to renumber anything except possibly a couple of externally-visible servers and gateways. Of course, that only remains true until some merger or acquisition mashes your 10/8 address space into another company's 10/8 address space , at which point you've still got work to do unless you were both careful about taking random subnets of 10/8, e.g. 10.x/16 for randomly selected x>10. ---- Thanks; Bill Note that this isn't my regular email account - It's still experimental so far. And Google probably logs and indexes everything you send it.