Jun-ichiro itojun Hagino wrote:
(sorry if it gets a duplicate)I'm inclined to believe that dual-stack provider networks are going to be relatively rare, and may not exist at all. I think it'll either beWIDE (AS2500) and two of the major ISPs which deploy IPv6 are running dual-stack. i bet others too (Verio, Internet2, anyone?) it is not economical to run two separate physical link across the pacific ocean.
At least pretty much all the academic networks I know are dual-stack, pretty big networks too, and this happened years ago. Several years ago the operator I work for also did that. We run IS-IS which handles both protocols with just one routing instance which is nice. The only problem we have is that it is hard to know exactly how much and what IPv6 traffic passes through the core. E.g. even though the routers are Netflow v9 capable, the hardware is not capable of creating IPv6 flow info. Stig
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