4 ms·
I'd expect those ISPs to use jumbo frames only where they use PPPoE so that it looks "transparent" to non-PPPoE traffic.
by netr0ute 5y ago
I'd expect those ISPs to use jumbo frames only where they use PPPoE so that it looks "transparent" to non-PPPoE traffic.
- deleted 5y ago[deleted]
- rjsw 5y agoThat is the whole point of RFC4638, it allows you to request an MTU of 1508 for the PPPoE connection so that the tunnelled frames can be 1500 bytes. The problem is that it tries to be backwards compatible which makes it hard to deal with this request not getting granted.
- bcrl 5y agoI've tried to detect MTU on PPPoE sessions with LCP echo requests, and it works... Until I came across consumer wireless routers that send back short LCP echo replies to 1500 byte LCP echo requests. Sometimes software is such complete garbage in the real world.