Re: [6gip] IP Address Mobility Project

Alexandre Petrescu <alexandre.petrescu@gmail.com> Thu, 23 February 2023 18:10 UTC

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From: Alexandre Petrescu <alexandre.petrescu@gmail.com>
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Subject: Re: [6gip] IP Address Mobility Project
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and, if one wants, one can try also these LTE-WiFi handovers with a 
normal mobile phone call (not whatsapp).  That can lead to other kinds 
of requirements which would probably be more related to GTP and QoS and 
VoLTE.

Alex

Le 23/02/2023 à 19:02, Alexandre Petrescu a écrit :
> 
> 
> Le 23/02/2023 à 18:39, David Lake a écrit :
>> <DL> In-line </DL>
>>
>> *From: *Alexandre Petrescu <alexandre.petrescu@gmail.com> *Date: 
>> *Thursday, 23 February 2023 at 17:26 *To: *Lake, David (PG/R - Comp 
>> Sci & Elec Eng) <d.lake@surrey.ac.uk> *Cc: *Hesham ElBakoury 
>> <helbakoury@gmail.com>, Giles Heron 
>> <giles=40layerfree.net@dmarc.ietf.org>, Toerless Eckert 
>> <tte@cs.fau.de>, 6gip@ietf.org <6gip@ietf.org>, Sridhar Bhaskaran 
>> <sridhar.bhaskaran@gmail.com> *Subject: *Re: [6gip] IP Address 
>> Mobility Project
>>
>>
>>
>> Le 23/02/2023 à 16:14, David Lake a écrit : [...]
>>>> Of course WhatsApp will work as you switch from 802.11 to LTE
>>>> and back but just as the default bearer in LTE has no QoS,
>>>> current 802.11 (other than WiFi6) has no concept of RF
>>>> capabilities.
>>>
>>> Will it work?  Is one sure?  I have strong doubts that my whatsapp
>>>  phone call will not break if I turn off the WiFi access point and
>>>  handover to a 4G network.
>>>
>>> The discussion of glitches - is in addition to that first point.
>>>
>>> If we agree that the whatsapp phone call breaks when moving from WiFi 
>>> to 4G, then we can see about the glitches too.
>>>
>>> By 'break' I mean 'hanged' (like when the person at the other end of 
>>> the phone line has hanged the phone and I need to dial up again).
>>>
>>> <DL> In telecoms terminology ‘cleared down.’ No – that does NOT 
>>> happen. I regularly have WhatsApp sessions that move between 802.11
>>> and WiFi multiple times.
>>
>> Clarification request: do you mean a move between 802.11 and WiFi? 
>> These are approximately the same, and I wouldnt expect breakage there.
>>
>> <DL> No – I meant between LTE and 802.11 (apologies) for WhatsApp. It
>> works all the time for me.
> 
> Thanks for the clarification.
> 
> So I just tried it myself too.
> 
> I performed several handovers WiFi-4G on the smartphone, with an ongoing
> whatsapp audio call.
> 
> The best it happens is no interruption in the audio.
> 
> Sometimes there are about 2 seconds of loss of voice during handover,
> and then reconnects and becomes normal.
> 
> The worst it happens is that the reconnexion trials fail and it hangs up
> with a message on the screen.
> 
> Following this situation it is easy to formulate requirements.
> 
> In an ideal situation there must be no loss of voice during a handover
> between WiFi and LTE, be that while the two interfaces are up
> simultaneously during handover, or when they are up-down distinctively
> without pause in between, or with a pause from when an interface goes
> down to another goes up. (the pause tolerance should be in the order of
> minutes, or variable, depends on app).
> 
> In no case should the app tell that the communication is hanged and
> require the user to restart it.
> 
> These are requirements.
> 
> These requirements can be compared to the LISP app on the smartphone, etc.
> 
> I mean, if other people, like you apprpeciate that there is no whatsapp
> breakage while I think it does, and if these other people are the LISP
> people - is LISP helping with the requirements I put above?
> 
> More simply put: if whatsapp doesnt break (as you think) during
> handovers, then why adding a LISP app to it?
> 
> If we put there a LISP app, will that 2-3 seconds interruption in
> whatsapp call, that I am the only one to seem to notice, disappear
> entirely?  Or will that loss be shortened somehow?  Or lengthened?
> 
>> [Now what would be REALLY nice is if I could have an E.164 dialer on 
>> WhatsApp (both ways) so that I could call anyone from anywhere 
>> provided the underlying protocol was the same.
> 
> True, that is an additional requirement: make whatsapp able to call
> fixed landlines too, not just mobiles, as currently does.
> 
> Or maybe you meant something else with that E.164 that I dont quite
> understand.
> 
>> That is the goal of the IETF and that is what I think we should be 
>> working on.  And if we could include a method for getting WhatsApp 
>> media over the GBR EPS just as VoLTE does, that would really start
>> to separate out 3GPP architectures and give me choice as a consumer]
> 
> Sounds interesting.  It should be set apart in our list of potential
> work items here in this group.
> 
> Alex
> 
>>
>> </DL>
>>
>>
>>
>> But a move between WiFi and LTE would be different - I would expect 
>> breakage of ongoing audio calls there.
>>
>> Alex
>>
>>
>>> Likewise I have calls on VoLTE that move between ePDG (VoWiFi) and
>>>  cell (VoLTE) all the time without breaking (although not all 
>>> operators support that feature.  </DL>
>>>
>>>
>>>
>>> If we dont agree about that breakage, then the discussion about 
>>> glitches is different.
>>>
>>> Alex PS: I read the text below, I will see later.
>>>
>>>
>>>>
>>>> And even with WiFi6, who determines which packets travel on the 
>>>> robust modulation items?  You’d just end up with everything
>>>> being marked ‘high-priority’ and there would be much less
>>>> bandwidth to share – self-defeating.
>>>>
>>>> And be VERY careful what you mean by ‘break.’  This is down to the 
>>>> use case – if I’m accompanying a singer/soloist over an LTE service 
>>>> (which I often do), then what is important for me is utter stability 
>>>> – jitter, lost packets or changes of codec are
>>>> an utter nightmare because my brain is already very busy reading 
>>>> music, playing the piano.  I really don’t have many more cycles left 
>>>> to second-guess that lost note or slight change in tempo introduced 
>>>> by a bit of packet buffering.  In that case, actually VoLTE is very, 
>>>> very good.
>>>>
>>>> But if I’m talking to someone where 30% of speech is silence and
>>>>  the brain is excellent at in-filling words then the occasional 
>>>> glitch on VoIP services such as WhatsApp is probably acceptable 
>>>> (although for me, very annoying!) </DL>
>>>>
>>>>
>>>>
>>>> For VoLTE I cant do any of these immediately obvious steps.
>>>>
>>>> But I can agree with you, based on trust, that probably VoLTE is a 
>>>> great performing tool.
>>>>
>>>> <DL> It is and I think we would be churlish to think it is anything 
>>>> but. What I think we need in future 6G networks is a 
>>>> domain-independent way of extending the concept of SLAs that is 
>>>> implied by IMS across the whole of the Internet so that we offer 
>>>> differentiated services both for technical and commercial reasons. 
>>>> But we need to do that in an inter-operable and open manner, not the 
>>>> closed-world of 3GPP, IMvHO. </DL>
>>>>
>>>>
>>>> Alex
>>>>
>>>>>
>>>>> David
>>>>>
>>>>> Sent from Outlook for iOS 
>>>>> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Faka.ms%2Fo0ukef&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086552114%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Q7qV69%2Bzar8F2yBQw%2B%2FLpAFw2bWCws5wAOn9HHpA26s%3D&reserved=0
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Faka.ms%2Fo0ukef&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086552114%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Q7qV69%2Bzar8F2yBQw%2B%2FLpAFw2bWCws5wAOn9HHpA26s%3D&reserved=0
>>>
>>>
>>>
> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Faka.ms%2Fo0ukef&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086552114%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Q7qV69%2Bzar8F2yBQw%2B%2FLpAFw2bWCws5wAOn9HHpA26s%3D&reserved=0 <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Faka.ms%2Fo0ukef&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086552114%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Q7qV69%2Bzar8F2yBQw%2B%2FLpAFw2bWCws5wAOn9HHpA26s%3D&reserved=0>>>>
>>>>>
>>>
>>>>>
>>> ------------------------------------------------------------------------
>>>>>
>>>
>>>
>>>
>>>>>
>>>> *From:* Alexandre Petrescu <alexandre.petrescu@gmail.com>
>>>>> *Sent:* Thursday, February 23, 2023 9:12:36 AM *To:* Sridhar 
>>>>> Bhaskaran <sridhar.bhaskaran@gmail.com> *Cc:* Hesham ElBakoury 
>>>>> <helbakoury@gmail.com>; Lake, David (PG/R - Comp Sci & Elec Eng) 
>>>>> <d.lake@surrey.ac.uk>; Giles Heron 
>>>>> <giles=40layerfree.net@dmarc.ietf.org>; Toerless Eckert 
>>>>> <tte@cs.fau.de>; 6gip@ietf.org <6gip@ietf.org> *Subject:* Re: 
>>>>> [6gip] IP Address Mobility Project For the traffic class 
>>>>> mutability: the routers in an xGPP (3GPP) network are all
>>>>> under the same authority. This means that that authority can
>>>>> easily configure all intermediary routers to not touch on the
>>>>> traffic class.
>>>>>
>>>>> Alex
>>>>>
>>>>> Le 23/02/2023 à 05:00, Sridhar Bhaskaran a écrit :
>>>>>>> Are there proposals to replace GTP?
>>>>>>
>>>>>> <SB> See 3GPP TR 29.892 - 
>>>>>> https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.3gpp.org%2Fftp%2FSpecs%2Farchive%2F29_series%2F29.892%2F29892-g00.zip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086552114%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=wk9V9QeDKfSDEoi1t8P0UyW8Q33xrXrjIxhRmvqWkVs%3D&reserved=0
>>>>>>
>>>>>>
> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.3gpp.org%2Fftp%2FSpecs%2Farchive%2F29_series%2F29.892%2F29892-g00.zip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086552114%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=wk9V9QeDKfSDEoi1t8P0UyW8Q33xrXrjIxhRmvqWkVs%3D&reserved=0>
>>>>>>
>>>>>>
> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.3gpp.org%2Fftp%2FSpecs%2Farchive%2F29_series%2F29.892%2F29892-g00.zip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=G8%2BSjqw7plj26kFe1jJEtCnWruZCgk5RjuGB5fqJWkM%3D&reserved=0 <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.3gpp.org%2Fftp%2FSpecs%2Farchive%2F29_series%2F29.892%2F29892-g00.zip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=G8%2BSjqw7plj26kFe1jJEtCnWruZCgk5RjuGB5fqJWkM%3D&reserved=0>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.3gpp.org%2Fftp%2FSpecs%2Farchive%2F29_series%2F29.892%2F29892-g00.zip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=G8%2BSjqw7plj26kFe1jJEtCnWruZCgk5RjuGB5fqJWkM%3D&reserved=0
>>>
>>>
>>>
> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.3gpp.org%2Fftp%2FSpecs%2Farchive%2F29_series%2F29.892%2F29892-g00.zip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=G8%2BSjqw7plj26kFe1jJEtCnWruZCgk5RjuGB5fqJWkM%3D&reserved=0 <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.3gpp.org%2Fftp%2FSpecs%2Farchive%2F29_series%2F29.892%2F29892-g00.zip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=G8%2BSjqw7plj26kFe1jJEtCnWruZCgk5RjuGB5fqJWkM%3D&reserved=0>>>
>>>>>>
>>>
>>>>>>
>>> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.3gpp.org%2Fftp%2FSpecs%2Farchive%2F29_series%2F29.892%2F29892-g00.zip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=G8%2BSjqw7plj26kFe1jJEtCnWruZCgk5RjuGB5fqJWkM%3D&reserved=0
>>>
>>>
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>> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.3gpp.org%2Fftp%2FSpecs%2Farchive%2F29_series%2F29.892%2F29892-g00.zip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=G8%2BSjqw7plj26kFe1jJEtCnWruZCgk5RjuGB5fqJWkM%3D&reserved=0
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> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.3gpp.org%2Fftp%2FSpecs%2Farchive%2F29_series%2F29.892%2F29892-g00.zip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=G8%2BSjqw7plj26kFe1jJEtCnWruZCgk5RjuGB5fqJWkM%3D&reserved=0 <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.3gpp.org%2Fftp%2FSpecs%2Farchive%2F29_series%2F29.892%2F29892-g00.zip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=G8%2BSjqw7plj26kFe1jJEtCnWruZCgk5RjuGB5fqJWkM%3D&reserved=0>>>>
>>>>>>
>>>>>>
>>>> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.3gpp.org%2Fftp%2FSpecs%2Farchive%2F29_series%2F29.892%2F29892-g00.zip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=G8%2BSjqw7plj26kFe1jJEtCnWruZCgk5RjuGB5fqJWkM%3D&reserved=0
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>>> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.3gpp.org%2Fftp%2FSpecs%2Farchive%2F29_series%2F29.892%2F29892-g00.zip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=G8%2BSjqw7plj26kFe1jJEtCnWruZCgk5RjuGB5fqJWkM%3D&reserved=0
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>> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.3gpp.org%2Fftp%2FSpecs%2Farchive%2F29_series%2F29.892%2F29892-g00.zip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=G8%2BSjqw7plj26kFe1jJEtCnWruZCgk5RjuGB5fqJWkM%3D&reserved=0
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> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.3gpp.org%2Fftp%2FSpecs%2Farchive%2F29_series%2F29.892%2F29892-g00.zip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=G8%2BSjqw7plj26kFe1jJEtCnWruZCgk5RjuGB5fqJWkM%3D&reserved=0 <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.3gpp.org%2Fftp%2FSpecs%2Farchive%2F29_series%2F29.892%2F29892-g00.zip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=G8%2BSjqw7plj26kFe1jJEtCnWruZCgk5RjuGB5fqJWkM%3D&reserved=0>>>>>
>>>>>> SRv6 was proposed and the outcome of the study is in this
>>>>>> TR. After this IETF DMM worked on this draft independently -
>>>>>>
>>>>>> https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fhtml%2Fdraft-ietf-dmm-srv6-mobile-uplane&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=lUNKQQh2dFkToYykbNMxw%2F%2FfkFK4ThcMCuoDOoSle1E%3D&reserved=0
>>>>>>
>>>>>>
> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fhtml%2Fdraft-ietf-dmm-srv6-mobile-uplane&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=lUNKQQh2dFkToYykbNMxw%2F%2FfkFK4ThcMCuoDOoSle1E%3D&reserved=0>
>>>>>>
>>>>>>
> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fhtml%2Fdraft-ietf-dmm-srv6-mobile-uplane&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=lUNKQQh2dFkToYykbNMxw%2F%2FfkFK4ThcMCuoDOoSle1E%3D&reserved=0 <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fhtml%2Fdraft-ietf-dmm-srv6-mobile-uplane&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=lUNKQQh2dFkToYykbNMxw%2F%2FfkFK4ThcMCuoDOoSle1E%3D&reserved=0>>
>>>>>>
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>>> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fhtml%2Fdraft-ietf-dmm-srv6-mobile-uplane&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=lUNKQQh2dFkToYykbNMxw%2F%2FfkFK4ThcMCuoDOoSle1E%3D&reserved=0
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> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fhtml%2Fdraft-ietf-dmm-srv6-mobile-uplane&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=lUNKQQh2dFkToYykbNMxw%2F%2FfkFK4ThcMCuoDOoSle1E%3D&reserved=0 <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fhtml%2Fdraft-ietf-dmm-srv6-mobile-uplane&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=lUNKQQh2dFkToYykbNMxw%2F%2FfkFK4ThcMCuoDOoSle1E%3D&reserved=0>>>
>>>>>>
>>>
>>>>>>
>>> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fhtml%2Fdraft-ietf-dmm-srv6-mobile-uplane&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=lUNKQQh2dFkToYykbNMxw%2F%2FfkFK4ThcMCuoDOoSle1E%3D&reserved=0
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>> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fhtml%2Fdraft-ietf-dmm-srv6-mobile-uplane&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=lUNKQQh2dFkToYykbNMxw%2F%2FfkFK4ThcMCuoDOoSle1E%3D&reserved=0
>>
>>
>>
> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fhtml%2Fdraft-ietf-dmm-srv6-mobile-uplane&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=lUNKQQh2dFkToYykbNMxw%2F%2FfkFK4ThcMCuoDOoSle1E%3D&reserved=0 <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fhtml%2Fdraft-ietf-dmm-srv6-mobile-uplane&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=lUNKQQh2dFkToYykbNMxw%2F%2FfkFK4ThcMCuoDOoSle1E%3D&reserved=0>>>>
>>>>>>
>>>>>>
>>>> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fhtml%2Fdraft-ietf-dmm-srv6-mobile-uplane&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=lUNKQQh2dFkToYykbNMxw%2F%2FfkFK4ThcMCuoDOoSle1E%3D&reserved=0
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fhtml%2Fdraft-ietf-dmm-srv6-mobile-uplane&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=lUNKQQh2dFkToYykbNMxw%2F%2FfkFK4ThcMCuoDOoSle1E%3D&reserved=0
>>>
>>>
>>>
>>>
>> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fhtml%2Fdraft-ietf-dmm-srv6-mobile-uplane&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=lUNKQQh2dFkToYykbNMxw%2F%2FfkFK4ThcMCuoDOoSle1E%3D&reserved=0
>>
>>
>>
> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fhtml%2Fdraft-ietf-dmm-srv6-mobile-uplane&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=lUNKQQh2dFkToYykbNMxw%2F%2FfkFK4ThcMCuoDOoSle1E%3D&reserved=0 <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fhtml%2Fdraft-ietf-dmm-srv6-mobile-uplane&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=lUNKQQh2dFkToYykbNMxw%2F%2FfkFK4ThcMCuoDOoSle1E%3D&reserved=0>>>>>
>>>>>>
>>>>>>
>>>>>>> I can say that QoS can also be done with flow labels and traffic
>>>>>>>
>>>>>> classes
>>>>>>> in IPv6 headers, without GTP.
>>>>>> <SB> Flow labels and traffic classes can be changed by on path IP 
>>>>>> devices (routers etc). 3GPP endpoints require an unmodified flow 
>>>>>> identifier. That is why they keep the flow identifier in 
>>>>>> additional layer of encapsulation (i.e in GTP header). The flow 
>>>>>> identifier marked by the first 3GPP entrypoint gateway (UPF) is 
>>>>>> kept all the way upto radio network in the downlink direction so 
>>>>>> that, radio network can directly use that as index to look up the 
>>>>>> resource
>>>>>> allocation scheme / scheduler and RRM details. For certain
>>>>>> services like voice media (which is marked by QOS flow
>>>>>> identifier corresponding to QCI/5QI 1), mission critical
>>>>>> services (QFI --> 5QI --> 69) etc, strict SLAs are there.
>>>>>> Network cant afford to let on path routers meddle with QoS
>>>>>> flow markers.
>>>>>>
>>>>>> Regards Sridhar On Thu, Feb 23, 2023 at 1:16 AM Alexandre Petrescu 
>>>>>> <alexandre.petrescu@gmail.com <mailto:alexandre.petrescu@gmail.com
>>>>>>
>>>>> <mailto:alexandre.petrescu@gmail.com
>>>> <mailto:alexandre.petrescu@gmail.com
>>> <mailto:alexandre.petrescu@gmail.com
>> <mailto:alexandre.petrescu@gmail.com>>>>>> wrote:
>>>>>>
>>>>>>
>>>>>>
>>>>>> Le 22/02/2023 à 19:43, Hesham ElBakoury a écrit :
>>>>>>
>>>>>> I can try to find that out.  I remember some relatively recent 
>>>>>> presentations at IETF about replacing GTP, or
>>>>>> reducing the number of headers.  It might have been in the 
>>>>>> (precursor?) of the DMM WG. (distributed mobility mgmt).
>>>>>>
>>>>>> A related question, IMHO, would be too whether there is an RFC for 
>>>>>> GTP in a first place...
>>>>>>
>>>>>> I can remember an Internet Draft of year 2000 about GTP - named 
>>>>>> simply draft-casati-gtp - but it was not pursued at IETF.
>>>>>>
>>>>>> If there were a GTP RFC, then we could think about improving
>>>>>>  it, replacing it, etc.
>>>>>>
>>>>>> When there is no GTP RFC, one can think about what should an ideal 
>>>>>> xGPP (3GPP) network use instead.
>>>>>>
>>>>>> Or maybe another way...
>>>>>>
>>>>>> Alex
>>>>>>
>>>>>>> Hesham
>>>>>>>
>>>>>>> On Wed, Feb 22, 2023, 10:39 AM Alexandre Petrescu 
>>>>>>> <alexandre.petrescu@gmail.com
>>>>>> <mailto:alexandre.petrescu@gmail.com 
>>>>>> <mailto:alexandre.petrescu@gmail.com 
>>>>>> <mailto:alexandre.petrescu@gmail.com
>>> <mailto:alexandre.petrescu@gmail.com
>> <mailto:alexandre.petrescu@gmail.com>>>>>
>>>>>> <mailto:alexandre.petrescu@gmail.com 
>>>>>> <mailto:alexandre.petrescu@gmail.com
>>>>> <mailto:alexandre.petrescu@gmail.com
>>>> <mailto:alexandre.petrescu@gmail.com
>>> <mailto:alexandre.petrescu@gmail.com
>> <mailto:alexandre.petrescu@gmail.com>>>>>>> wrote:
>>>>>>>
>>>>>>> David, Giles,
>>>>>>>
>>>>>>> Le 22/02/2023 à 14:35, David Lake a écrit :
>>>>>>>> This:
>>>>>>>>
>>>>>>>> “…the 5G UPF terminates the GTP tunnel but also does QoS,
>>>>>> charging,
>>>>>>>> lawful intercept etc. ”
>>>>>>>>
>>>>>>>> … is a VERY important point.  GTP enables a number of very
>>>>>> low-level
>>>>>>>> RF features which MNOs need to control their allocation of
>>>>>> spectrum
>>>>>>>> and more importantly the numerology associated with an
>>>>>> application.
>>>>>>>> It is also used in shared solutions such a CoMP.
>>>>>>>
>>>>>>> I can agree with the importance of the point above.  I can
>>>>>> agree about
>>>>>>> improvements there might be necessary.
>>>>>>>
>>>>>>> I can say that QoS can also be done with flow labels and
>>>>>> traffic classes
>>>>>>> in IPv6 headers, without GTP.
>>>>>>>
>>>>>>
>>>>>>> But I agree with the importance of the topic.
>>>>>>>
>>>>>>>> If we are to replace GTP (and I think there is a reason to
>>>>>> do that)
>>>>>>>> we have to provide the interactions to the layer 1 that
>>>>>> MNOs need.
>>>>>>>
>>>>>>> I agree.
>>>>>>>
>>>>>>> [...] Giles said:
>>>>>>>> I’m not sure that your electricity analysis is correct.
>>>>>>>>
>>>>>>>> Doing e.g. an MPLS exact match lookup across a FIB with
>>>>>>>> a few thousand labels rather than an IPv6 longest-match lookup
>>>>>> across a FIB
>>>>>>>> with a few million prefixes, for example, may well more
>>>>>> than offset
>>>>>>>> the extra electricity consumption caused by the extra 4
>>>>>> bytes of
>>>>>>>> header.
>>>>>>>>
>>>>>>>> And then of course there’s all the electricity consumed by the 
>>>>>>>> control plane updates hitting the router CPUs.
>>>>>>>
>>>>>>> I can agree.  But I do not take that as an invitation to ignore 
>>>>>>> electricity consumption.  Rather, all points you mention
>>>>>> (exact match
>>>>>>> lookup consumption, ctl plane) should be measured and told
>>>>>> who consumes
>>>>>>> more, and then decide what to reduce.
>>>>>>>
>>>>>>> I do not take your remark as giving up electricity savings
>>>>>>>  in
>>>>>> front of
>>>>>>> too much complexity of understanding what's happening.
>>>>>>>
>>>>>>> I do not take your remark as freedom to add more headers when
>>>>>> it becomes
>>>>>>> necessary to add more functionality.
>>>>>>>
>>>>>>> [...]
>>>>>>>
>>>>>>>>> More details about this performance degradation can be
>>>>>> provided if
>>>>>>>>> absolutely necessary, but some times trust might also
>>>>>> help for a
>>>>>>>>> quicker understanding towards realizing a common goal.
>>>>>>>>>  (the development of trust is another matter that we can 
>>>>>>>>> discuss separately :-)
>>>>>>>>
>>>>>>>> Trust takes time to earn, and I’d tend to suggest that
>>>>>> arguing that
>>>>>>>> it makes sense to inject a host route for a UE into OSPF
>>>>>> may not be
>>>>>>>> the best way to earn it.
>>>>>>>
>>>>>>> Given this apparent disparate understanding about routing -
>>>>>> you seem to
>>>>>>> be more people to be saying the contrary of what I say - I
>>>>>> give up this
>>>>>>> topic discussion on host based routes.  Maybe for later for
>>>>>> another G,
>>>>>>> maybe never.
>>>>>>>
>>>>>>> Alex
>>>>>>>
>>>>>>> -- 6gip mailing list 6gip@ietf.org <mailto:6gip@ietf.org 
>>>>>>> <mailto:6gip@ietf.org <mailto:6gip@ietf.org <mailto:6gip@ietf.org 
>>>>>>> <mailto:6gip@ietf.org>>>>> <mailto:6gip@ietf.org
>>>>>> <mailto:6gip@ietf.org <mailto:6gip@ietf.org <mailto:6gip@ietf.org 
>>>>>> <mailto:6gip@ietf.org <mailto:6gip@ietf.org>>>>>>
>>>>>>> https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2F6gip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Fbc%2Balk3qI%2Bf8qAtZNRNIDK%2Fyz8CWxrKUs7Loc0pnoY%3D&reserved=0
>>>>>>>
>>>>>>>
> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2F6gip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Fbc%2Balk3qI%2Bf8qAtZNRNIDK%2Fyz8CWxrKUs7Loc0pnoY%3D&reserved=0>
>>>>>>>
>>>>>>>
> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2F6gip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Fbc%2Balk3qI%2Bf8qAtZNRNIDK%2Fyz8CWxrKUs7Loc0pnoY%3D&reserved=0 <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2F6gip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Fbc%2Balk3qI%2Bf8qAtZNRNIDK%2Fyz8CWxrKUs7Loc0pnoY%3D&reserved=0>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2F6gip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Fbc%2Balk3qI%2Bf8qAtZNRNIDK%2Fyz8CWxrKUs7Loc0pnoY%3D&reserved=0
>>>
>>>
>>>
> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2F6gip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Fbc%2Balk3qI%2Bf8qAtZNRNIDK%2Fyz8CWxrKUs7Loc0pnoY%3D&reserved=0 <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2F6gip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Fbc%2Balk3qI%2Bf8qAtZNRNIDK%2Fyz8CWxrKUs7Loc0pnoY%3D&reserved=0>>>
>>>>>>>
>>>
>>>>>>>
>>> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2F6gip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Fbc%2Balk3qI%2Bf8qAtZNRNIDK%2Fyz8CWxrKUs7Loc0pnoY%3D&reserved=0
>>>
>>>
>>>
>>>
>> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2F6gip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Fbc%2Balk3qI%2Bf8qAtZNRNIDK%2Fyz8CWxrKUs7Loc0pnoY%3D&reserved=0
>>
>>
>>
> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2F6gip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Fbc%2Balk3qI%2Bf8qAtZNRNIDK%2Fyz8CWxrKUs7Loc0pnoY%3D&reserved=0 <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2F6gip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Fbc%2Balk3qI%2Bf8qAtZNRNIDK%2Fyz8CWxrKUs7Loc0pnoY%3D&reserved=0>>>>
>>>>>>
>>>>>>>
>>>> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2F6gip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Fbc%2Balk3qI%2Bf8qAtZNRNIDK%2Fyz8CWxrKUs7Loc0pnoY%3D&reserved=0
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2F6gip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Fbc%2Balk3qI%2Bf8qAtZNRNIDK%2Fyz8CWxrKUs7Loc0pnoY%3D&reserved=0
>>>
>>>
>>>
>>>
>> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2F6gip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Fbc%2Balk3qI%2Bf8qAtZNRNIDK%2Fyz8CWxrKUs7Loc0pnoY%3D&reserved=0
>>
>>
>>
> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2F6gip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Fbc%2Balk3qI%2Bf8qAtZNRNIDK%2Fyz8CWxrKUs7Loc0pnoY%3D&reserved=0 <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2F6gip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Fbc%2Balk3qI%2Bf8qAtZNRNIDK%2Fyz8CWxrKUs7Loc0pnoY%3D&reserved=0>>>>>
>>>>>>> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2F6gip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Fbc%2Balk3qI%2Bf8qAtZNRNIDK%2Fyz8CWxrKUs7Loc0pnoY%3D&reserved=0
>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2F6gip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Fbc%2Balk3qI%2Bf8qAtZNRNIDK%2Fyz8CWxrKUs7Loc0pnoY%3D&reserved=0
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2F6gip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086708906%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Fbc%2Balk3qI%2Bf8qAtZNRNIDK%2Fyz8CWxrKUs7Loc0pnoY%3D&reserved=0
>>>
>>>
>>>
>>>
>> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2F6gip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086864547%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=W7DAvDFSycMUZ5z%2FbVBJuFxLsdvD%2BXc9rt28pBBBLMY%3D&reserved=0
>>
>>
>>
> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2F6gip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086864547%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=W7DAvDFSycMUZ5z%2FbVBJuFxLsdvD%2BXc9rt28pBBBLMY%3D&reserved=0 <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2F6gip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086864547%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=W7DAvDFSycMUZ5z%2FbVBJuFxLsdvD%2BXc9rt28pBBBLMY%3D&reserved=0>>>>>>
>>>>>>>
>>>>>>
>>>>>> -- 6gip mailing list 6gip@ietf.org <mailto:6gip@ietf.org 
>>>>>> <mailto:6gip@ietf.org <mailto:6gip@ietf.org <mailto:6gip@ietf.org 
>>>>>> <mailto:6gip@ietf.org>>>>> 
>>>>>> https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2F6gip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086864547%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=W7DAvDFSycMUZ5z%2FbVBJuFxLsdvD%2BXc9rt28pBBBLMY%3D&reserved=0
>>>>>>
>>>>>>
> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2F6gip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086864547%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=W7DAvDFSycMUZ5z%2FbVBJuFxLsdvD%2BXc9rt28pBBBLMY%3D&reserved=0>
>>>>>>
>>>>>>
> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2F6gip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086864547%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=W7DAvDFSycMUZ5z%2FbVBJuFxLsdvD%2BXc9rt28pBBBLMY%3D&reserved=0 <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2F6gip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086864547%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=W7DAvDFSycMUZ5z%2FbVBJuFxLsdvD%2BXc9rt28pBBBLMY%3D&reserved=0>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2F6gip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086864547%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=W7DAvDFSycMUZ5z%2FbVBJuFxLsdvD%2BXc9rt28pBBBLMY%3D&reserved=0
>>>
>>>
>>>
> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2F6gip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086864547%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=W7DAvDFSycMUZ5z%2FbVBJuFxLsdvD%2BXc9rt28pBBBLMY%3D&reserved=0 <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2F6gip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086864547%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=W7DAvDFSycMUZ5z%2FbVBJuFxLsdvD%2BXc9rt28pBBBLMY%3D&reserved=0>>>
>>>>>>
>>>
>>>>>>
>>> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2F6gip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086864547%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=W7DAvDFSycMUZ5z%2FbVBJuFxLsdvD%2BXc9rt28pBBBLMY%3D&reserved=0
>>>
>>>
>>>
>>>
>> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2F6gip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086864547%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=W7DAvDFSycMUZ5z%2FbVBJuFxLsdvD%2BXc9rt28pBBBLMY%3D&reserved=0
>>
>>
>>
> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2F6gip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086864547%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=W7DAvDFSycMUZ5z%2FbVBJuFxLsdvD%2BXc9rt28pBBBLMY%3D&reserved=0 <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2F6gip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086864547%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=W7DAvDFSycMUZ5z%2FbVBJuFxLsdvD%2BXc9rt28pBBBLMY%3D&reserved=0>>>>
>>>>>>
>>>>>>
>>>> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2F6gip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086864547%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=W7DAvDFSycMUZ5z%2FbVBJuFxLsdvD%2BXc9rt28pBBBLMY%3D&reserved=0
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2F6gip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086864547%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=W7DAvDFSycMUZ5z%2FbVBJuFxLsdvD%2BXc9rt28pBBBLMY%3D&reserved=0
>>>
>>>
>>>
>>>
>> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2F6gip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086864547%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=W7DAvDFSycMUZ5z%2FbVBJuFxLsdvD%2BXc9rt28pBBBLMY%3D&reserved=0
>>
>>
>>
> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2F6gip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086864547%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=W7DAvDFSycMUZ5z%2FbVBJuFxLsdvD%2BXc9rt28pBBBLMY%3D&reserved=0 <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2F6gip&data=05%7C01%7Cd.lake%40surrey.ac.uk%7Cb5d877729164418852fa08db15c32317%7C6b902693107440aa9e21d89446a2ebb5%7C0%7C1%7C638127700086864547%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=W7DAvDFSycMUZ5z%2FbVBJuFxLsdvD%2BXc9rt28pBBBLMY%3D&reserved=0>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> -- o__ _>  /__ (_) \(_)... Burn fat not fuel - Bike along to a 
>>>>>> healthier life and cleaner world! :)
>>>>>>
>>>>>> Sridhar Bhaskaran
>>>>>>
>>>>
>>>
>>
>