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[Chrysalis]

yeah the router isnt the endpoint the pc is, so you better of lowering it on the pc instead of the router.

Setting your router to 1492 and leaving the pc at 1500 means you are still having to go through mtu negotiation on new connections.

ipv6 has technology whereby if you lower it on the router then it will lower it also automatically on your devices (although this has been problematic for some vendors including asus), ipv4 instead relies on mtu discovery.

[aesmith]

Although changing the PC to match is ideal, it's not really realistic to manually configure MTU on every host, what about phones, tablets, visitors etc.   I don't really think that's practical unless there's a way for DHCP to set MTU - and even then would this option be supported by all hosts?

[Chrysalis]

yeah its hassle hence me saying PPPoE is lame.

Lowering the router and leaving the devices as they are wont achieve anything.

Jumbo frames workaround can remove this hassle and aaisp documented about it as well.