Hi, On Tue, May 27, 2025 at 04:40:30PM +0300, Alexey Berezhnev wrote:
While I appreciate the perspective, I???d suggest that many of those ???big ISPs??? who are reluctant to implement IPv6 are not simply unmotivated ??? they are being rational.
If you???ve ever priced out true dual-stack backbone-grade routers ??? the kind required to maintain IPv4+IPv6 parity at scale ??? and accounted for the fact that these setups must be duplicated to meet modern HA/availability requirements, you???d probably hesitate to ???invest??? in IPv6 too.
The capital expenditure is not trivial. Vendors don???t discount IPv6-ready hardware because it???s the ???future.??? On the contrary, the complexity, licensing, and redundancy expectations only add to the financial and operational burden. So it???s not always about lacking motivation ??? sometimes it???s just about responsible budgeting.
This is all so 1990s. Reasonable vendors these days do not charge extra for v6, and ship FIB space sufficiently large that v6 fits nicely. The v4 routing table is so much larger than the v6 table that if you buy a box that can handle v4's expected fib table growth over the next 5 years, 200k lines for v6 won't make a significant impact. Now, buying 10 year old discounted gear will be cheap - but won't handle full table v4 today (they *will* handle "internal routes + default" v4 *and* v6 just fine). If budget is really tight, get a Linux PC for your routing. Will do v4, v6, and both with full tables... (and with sufficiently recent NICs, well over 100Gbit/s on a single PC, with full tables). Gert Doering -- NetMaster -- have you enabled IPv6 on something today...? SpaceNet AG Vorstand: Sebastian v. Bomhard, Karin Schuler, Sebastian Cler Joseph-Dollinger-Bogen 14 Aufsichtsratsvors.: A. Grundner-Culemann D-80807 Muenchen HRB: 136055 (AG Muenchen) Tel: +49 (0)89/32356-444 USt-IdNr.: DE813185279