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>why? The only advantage I can think of is that it's easier to remember/enter for humans, which isn't really a good reason because there's DNS anyways. It'd re
by xxpor 6y ago
>why? The only advantage I can think of is that it's easier to remember/enter for humans, which isn't really a good reason because there's DNS anyways.
It'd reduce the size of the IPv6 header, allowing more data per 1500 mtu packet. There's a lot of situations that are bound by packet rate limits, not bandwidth concerns.
BTW, if we're going to radically reimagine the internet, we should really push for a 9000+ MTU.
- mytailorisrich 6y agoI think the point of 128 bit addresses in IPv6 is that it is effectively unlimited and thus won't cause problems and can make address allocation simpler. It's a bit like the maxima in ZFS. Current technology allows to pick maxima so large that we can just forget about them, so why not do it?
- xxpor 6y agoOh I'm not advocating for it, I'm just saying that'd be the argument. I think avoiding a new L3 transition ever again is well worth the tradeoff.
- gruez 6y ago>It'd reduce the size of the IPv6 header, allowing more data per 1500 mtu packet. There's a lot of situations that are bound by packet rate limits, not bandwidth concerns. So in cases where we're packet limited and not bandwidth limited we'd get a 1.1% throughput boost (1460 IP payload vs 1476). Seems like a fair tradeoff for never having to worry about NAT or address exhaustion ever again.
- betaby 6y ago1. All Tier1 ISP have mtu of at least 4470 since forever. 2. Most Tier1 ISP have 9000 ip mtu for a long time.
- xxpor 6y agoEyeball networks don't though. In fact, a decent number (at least in the US) still run PPPoE, shaving off even more.
- betaby 6y agoConsumer networks lags badly, indeed. And inventing random new protocols won't fix limitations of MTU.
- gruez 6y agoHow does that work with connections (eg. consumer ISPs) that use <= 1500 MTU? If there's even one router in your path that doesn't accept high MTUs, any benefits will evaporate. So basically high MTUs are only really useful for datacenter <-> datacenter connections, where you can reliably get high MTUs throughout the entire path.
- pas 6y agoSo, if we're talking about reworking everything, then ... just burn those middleboxes. IPv6 already mandates path MTU discovery and min MTU of 1280.