3 ms·
1. All Tier1 ISP have mtu of at least 4470 since forever. 2. Most Tier1 ISP have 9000 ip mtu for a long time.
by betaby 6y ago
1. 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.