nanog mailing list archives
Re: Lossy cogent p2p experiences?
From: Saku Ytti <saku () ytti fi>
Date: Wed, 6 Sep 2023 17:14:52 +0300
On Wed, 6 Sept 2023 at 17:10, Benny Lyne Amorsen <benny+usenet () amorsen dk> wrote:
TCP looks quite different in 2023 than it did in 1998. It should handle packet reordering quite gracefully; in the best case the NIC will
I think the opposite is true, TCP was designed to be order agnostic. But everyone uses cubic, and for cubic reorder is the same as packet loss. This is a good trade-off. You need to decide if you want to recover fast from occasional packet loss, or if you want to be tolerant of reordering. The moment cubic receives frame+1 it expects, it acks frame-1 again, signalling loss of packet, causing unnecessary resend and window size reduction.
will never even know they were reordered. Unfortunately current equipment does not seem to offer per-packet load balancing, so we cannot test how well it works.
For example Juniper offers true per-packet, I think mostly used in high performance computing. -- ++ytti
Current thread:
- Re: Lossy cogent p2p experiences?, (continued)
- Re: Lossy cogent p2p experiences? Mark Tinka (Sep 05)
- Re: Lossy cogent p2p experiences? Masataka Ohta (Sep 06)
- Re: Lossy cogent p2p experiences? Mark Tinka (Sep 06)
- Re: Lossy cogent p2p experiences? Saku Ytti (Sep 06)
- Re: Lossy cogent p2p experiences? Masataka Ohta (Sep 06)
- Re: Lossy cogent p2p experiences? Mark Tinka (Sep 06)
- Re: Lossy cogent p2p experiences? Saku Ytti (Sep 06)
- Re: Lossy cogent p2p experiences? William Herrin (Sep 06)
- Re: Lossy cogent p2p experiences? Masataka Ohta (Sep 06)
- Re: Lossy cogent p2p experiences? Benny Lyne Amorsen (Sep 06)
- Re: Lossy cogent p2p experiences? Saku Ytti (Sep 06)
- Re: Lossy cogent p2p experiences? Tom Beecher (Sep 06)
- Re: Lossy cogent p2p experiences? Mark Tinka (Sep 06)
- RE: Lossy cogent p2p experiences? Brian Turnbow via NANOG (Sep 06)
- Re: Lossy cogent p2p experiences? Tom Beecher (Sep 06)
- Re: Lossy cogent p2p experiences? Mark Tinka (Sep 06)
- Re: Lossy cogent p2p experiences? David Bass (Sep 06)
- Re: Lossy cogent p2p experiences? Saku Ytti (Sep 07)
- Re: Lossy cogent p2p experiences? Mark Tinka (Sep 07)
- Re: Lossy cogent p2p experiences? Fred Baker (Sep 08)
- Re: Lossy cogent p2p experiences? Masataka Ohta (Sep 07)
