[Ntp] Antw: [EXT] Re: Symmetric mode

[Ulrich Windl <[e-mail]>]

>>> Danny Mayer <[e-mail]> schrieb am 29.09.2022 um 01:33 in
Nachricht <[e-mail]>:

> On 9/25/22 3:09 AM, Hal Murray wrote:
>>>> It uses twice as many packets.
>>> No, it doesn't. Run it and check the packet traffic. Yes each side sends  a
>>> packet to the other the same as if both were referencing the other as
>>> servers
>> We had a pronoun binding mixed up.
>>
>> A setup with a pair of client/server connections will use twice as much
>> traffic as a single symmetric connection.
> 
> I realized over the weekend that people have misunderstood how symmetric 
> mode works and think that there is just one packet exchange between 
> peers. That is incorrect. That's not how it works.
> 
> Symmetric mode works almost identically to client/server modes on the 
> wire. The only difference is that client/server use modes 3 and 4 while 
> symmetric peer use mode 1 or 2 depending on whether these are active or 
> passive modes. You should see no difference on the wire between 
> client/server and symmetric modes except for the mode value.

But if that's the whole difference, why are the extra modes needed?

> 
>>
>>>> It works with NTS.
>>> NTS dropped it in the interested of getting NTS out.
>> Same issue.  NTS works today if you use client/server mode.
>>
> It would be trivial to add to symmetric mode, see above.
> 
> Danny
> 
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