nanog mailing list archives
Re: MTU to CDN's
From: "Radu-Adrian Feurdean" <nanog () radu-adrian feurdean net>
Date: Fri, 19 Jan 2018 17:35:14 +0100
On Fri, Jan 19, 2018, at 01:14, Jared Mauch wrote:
If you’re then doing DSL + PPPoE and your customers really see a MTU of 1492 or less, then another device has to fragment 5x again.
In this part of the world we have even worse stuff around: PPP over L2TP over over IP with 1500 MTU interconnection. Remove another 40 bytes. Add some more headers for various tunneling scenarios and you may get into a situation where even 1400 is too much. But it usually works with MSS clamping to the correct value. Some small ISPs don't even make the effort to check if the transport supports "more than 1500" in order to give the 1500 bytes to the customer - they just clamp down MSS.
Current thread:
- Re: MTU to CDN's, (continued)
- Re: MTU to CDN's Mark Andrews (Jan 18)
- Re: MTU to CDN's George Michaelson (Jan 18)
- Re: MTU to CDN's Jared Mauch (Jan 18)
- Re: MTU to CDN's William Herrin (Jan 18)
- Re: MTU to CDN's Owen DeLong (Jan 18)
- Re: MTU to CDN's Jared Mauch (Jan 18)
- Re: MTU to CDN's William Herrin (Jan 18)
- Re: MTU to CDN's Jared Mauch (Jan 19)
- Re: MTU to CDN's Jared Mauch (Jan 19)
- Re: MTU to CDN's William Herrin (Jan 19)
- Re: MTU to CDN's Radu-Adrian Feurdean (Jan 19)
- Re: MTU to CDN's Mark Andrews (Jan 19)
- Re: MTU to CDN's Mikael Abrahamsson (Jan 19)
- Re: MTU to CDN's Vincent Bernat (Jan 18)
- Message not available
- Message not available
- Re: MTU to CDN's Michael Crapse (Jan 18)
- Re: MTU to CDN's Mikael Abrahamsson (Jan 18)
- Re: MTU to CDN's Mike Hammett (Jan 19)
- Re: MTU to CDN's Mikael Abrahamsson (Jan 19)
- Re: MTU to CDN's Mike Hammett (Jan 19)
- Re: MTU to CDN's Jared Mauch (Jan 19)
- Re: MTU to CDN's Mike Hammett (Jan 19)