On Tue, 12 Jul 2022, Sebastian Moeller wrote:

Hi David,

Thanks!

On Jul 12, 2022, at 19:56, David Lang <[email protected]> wrote:

On Tue, 12 Jul 2022, Sebastian Moeller via Bloat wrote:

There are plenty of useful things that they can do and yes, I personally think 
they’re the way of the future - but **not** in their current form, where they 
must “lie” to TCP, cause ossification,

        [SM] Here I happily agree, if we can get the nagative side-effects 
removed that would be great, however is that actually feasible or just 
desirable?
etc. PEPs have never been considered as part of the congestion control design - 
when they came on the scene, in the IETF, they were despised for breaking the 
architecture, and then all the trouble with how they need to play tricks was 
discovered (spoofing IP addresses, making assumptions about header fields, and 
whatnot). That doesn’t mean that a very different kind of PEP - one which is 
authenticated and speaks an agreed-upon protocol - couldn’t be a good solution.

        [SM] Again, I agree it could in theory especially if well-architected.
That’s what I’m advocating.

        [SM] Well, can you give an example of an existing well-architected PEP 
as proof of principle?

the windows protocols work very poorly over high latency links (i.e. long 
distance links) and the PEPs that short circuit those protocols make life much 
nicer for users as well as reducing network traffic.

        [SM] Windows protocols, like in microsoft's server message block (smb) protocol 
or as in "protocols using data windows", like TCP's congestion and receive 
window?

microsoft windows smb

it's a nasty protocol to start with, but it's the reality on the ground and 
proxies do help a lot.

        [SM] Are such proxies located in third party middle boxes/proxies or 
are these part of microsoft's software suite for enterprises (assuming the 
first as answer to my question)?

third party middle boxes that you put in each office as a proxy.

David Lang
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