support for UDP

support for UDP

[Olga Kornievskaia]

Hi folks,

I'd like to gauge what people think. Do you think we'd ever do a bold
thing like drop the UDP support in the upstream kernel (obviously with
a plan to fade it out with a config option that we did with the des
support)...

Re: support for UDP

[Daniel Gryniewicz]

On 9/13/19 11:14 AM, Olga Kornievskaia wrote:
> Hi folks,
> 
> I'd like to gauge what people think. Do you think we'd ever do a bold
> thing like drop the UDP support in the upstream kernel (obviously with
> a plan to fade it out with a config option that we did with the des
> support)...
> 

Yes, please.

Daniel

RE: support for UDP

[Frank Filz]

> On 9/13/19 11:14 AM, Olga Kornievskaia wrote:
> > Hi folks,
> >
> > I'd like to gauge what people think. Do you think we'd ever do a bold
> > thing like drop the UDP support in the upstream kernel (obviously with
> > a plan to fade it out with a config option that we did with the des
> > support)...
> >
> 
> Yes, please.

Yea, it would certainly be nice to not have to worry about UDP connections. They don't work for NFS in high speed high bandwidth workloads due to the issues with fragment reassembly. Their use for NFS v3 sideband protocols doesn't really buy much.

Of course we'll still have to support UDP for 10 more years...

Frank

Re: support for UDP

[Steve Dickson]

On 9/13/19 11:14 AM, Olga Kornievskaia wrote:
> Hi folks,
> 
> I'd like to gauge what people think. Do you think we'd ever do a bold
> thing like drop the UDP support in the upstream kernel (obviously with
> a plan to fade it out with a config option that we did with the des
> support)...
> 
Starting with Fedora 29 and RHEL7 UDP mounts are no longer negotiated.
The command line argument is need to do a UDP mount.

Again starting with Fedora 29 and now RHEL8 UDP is off by default
on the NFS servers. A configuration change is needed for UDP mounts.

We did this to cut the testing matrix in half... 

We've not had any push back on the lack of UDP support. 

Personally I think it is long overdue... 

My two cents,

steved.

Support for udp

[Sagar Acharya]

Does pppd support udp? I am able to access tcp but not udp with pppd.
Thanking you
Sagar Acharya
https://humaaraartha.in/selfdost/selfdost.html

Kindly cc me as I am not subscribed.

Re: Support for udp

[Sagar Acharya]

So are you saying pppd does not support udp or does it?
Thanking you
Sagar Acharya
https://humaaraartha.in/selfdost/selfdost.html



6 Oct 2023, 11:06 by simha@multitech.co.in:

> pppd works at IP layer. All IP protocols not dependent on broadcast capabilities should work.
>
> On 05-10-2023 23:30, Sagar Acharya wrote:
>
>> Does pppd support udp? I am able to access tcp but not udp with pppd.
>> Thanking you
>> Sagar Acharya
>> https://humaaraartha.in/selfdost/selfdost.html
>>
>> Kindly cc me as I am not subscribed.
>>

Re: Support for udp

[Michael Richardson]

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Sagar Acharya <sagaracharya@tutanota.com> wrote:
    > So are you saying pppd does not support udp or does it?  Thanking you
    > Sagar Acharya https://humaaraartha.in/selfdost/selfdost.html

You didn't understand the answer because you didn't actually ask a sensible question.

PPP is a "layer-2"
UDP is a "layer-4"

https://en.wikipedia.org/wiki/OSI_model
https://www.oreilly.com/library/view/internet-core-protocols/1565925726/ch01s02s02.html

There are situations where one might encapsulate PPP packets into UDP
packets.  This usually happens in back-hauls of ISP/DSL networks using L2TP.
But, that's not a typical situation for an end-user.

Myself and many others have built commercial BRAS using pppd, and there is
even support in the Linux kernel for efficient encap/decap of L2TP/PPP packets.
https://en.wikipedia.org/wiki/Broadband_remote_access_server

    >> pppd works at IP layer. All IP protocols not dependent on broadcast
    >> capabilities should work.
    >>
    >> On 05-10-2023 23:30, Sagar Acharya wrote:
    >>
    >>> Does pppd support udp? I am able to access tcp but not udp with pppd.
    >>> Thanking you Sagar Acharya
    >>> https://humaaraartha.in/selfdost/selfdost.html
    >>>
    >>> Kindly cc me as I am not subscribed.
    >>>

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