In message <20120127015842.gh6...@angus.ind.wpi.edu>, Chuck Anderson writes: > On Thu, Jan 26, 2012 at 07:53:18PM +0000, George Bonser wrote: > > > Even if you don't see an advantage to GUA, can you point to a > > > disadvantage? > > > > Just a matter of convenience. If you have a lot of management IPs or some > other IP addresses that are never going to need internet access (an array of > 10,000 sensors or something) you don't need to dip into your global allocatio > n to address them. If it is routed within the organization but never goes to > the Internet, ULA is ok. If it doesn't get routed at all, link local will d > o fine. It's good to keep in mind that more things than computers with web > browsers are going to get an IP address. > > Link-local won't do fine in many cases due to poor application > compatibilty with address scopes.
Link local is a right royal pain for applications. The DNS does not support it. It requires passing arount 150 bits of address information instead of 128. -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org