Re: [dhcwg] DHCPv6 and IPv6ND

Alexandru Petrescu <alexandru.petrescu@gmail.com> Wed, 15 November 2017 13:36 UTC

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To: "Bernie Volz (volz)" <volz@cisco.com>
Cc: Ted Lemon <mellon@fugue.com>, dhcwg <dhcwg@ietf.org>
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From: Alexandru Petrescu <alexandru.petrescu@gmail.com>
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Date: Wed, 15 Nov 2017 14:36:02 +0100
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Subject: Re: [dhcwg] DHCPv6 and IPv6ND
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I am afraid there is no 3GPP modem for smartphone that lets DHCPv6 through.

Qualcomm blocks multicast UDP 547 whereas Balong blocks multicast 
altogether.

I do need a modem to connect on 4G, LTE-V2X and pre-5G that does let 
DHCPv6 through.

But I would like to ask you: if no such modem exist on the market, why 
not modifying the DHCPv6 protocol to work on non-547 ports and on unicast?

Alex

Le 15/11/2017 à 11:01, Bernie Volz (volz) a écrit :
> I don’t see how this is an IETF issue. Push pn the vendor to fix it; or 
> don’t buy it.
> 
> - Bernie (from iPhone)
> 
> On Nov 15, 2017, at 5:57 PM, Alexandre Petrescu 
> <alexandru.petrescu@gmail.com <mailto:alexandru.petrescu@gmail.com>> wrote:
> 
>> YEs, a problem with software that runs on a particular hardware problem.
>>
>> Another problem with that software too, is that it is closed source 
>> and a very high price to buy.  Moreover, it is almost forbidden to 
>> modify it by other company than the writer.
>>
>> Very many people were tempted to fix that software but it looks very 
>> hard to access.
>>
>> Alex
>>
>> Le 15/11/2017 à 10:07, Ted Lemon a écrit :
>>> How can it be a hardware problem?  Bits are bits. Don't you mean "a 
>>> problem with software that runs on a particular hardware platform?"
>>> On Nov 15, 2017 15:48, "Alexandre Petrescu" 
>>> <alexandru.petrescu@gmail.com <mailto:alexandru.petrescu@gmail.com> 
>>> <mailto:alexandru.petrescu@gmail.com>> wrote:
>>>    Le 15/11/2017 à 03:49, Ted Lemon a écrit :
>>>        On Nov 15, 2017, at 10:33 AM, Alexandru Petrescu
>>>        <alexandru.petrescu@gmail.com 
>>> <mailto:alexandru.petrescu@gmail.com>
>>>        <mailto:alexandru.petrescu@gmail.com>
>>>        <mailto:alexandru.petrescu@gmail.com
>>>        <mailto:alexandru.petrescu@gmail.com>>> wrote:
>>>            They dont understand that nobody asks them to implement
>>>            DHCPv6 on the modem.  The DHCPv6 happens between ARM and the
>>>            cellular operator.  Both sides are ready, yet the middle
>>>            (the 'modem') blocks 547.
>>>            That's the problem.
>>>        I'm confused.   I thought you were saying that we can't do ND,
>>>        but it sounds like what we can't do is DHCP.   And the reason we
>>>        can't do it is a misconfigured middlebox, not a protocol issue.
>>>    I was saying the DHCPv6+ND is unsolved in cellular.  It is not a
>>>    protocol issue but a hardware problem.
>>>    There are protocol solutions to the hardware problems, like ability
>>>    to vary port numbers.
>>>    Or we can further wait for hardware issues to be solved, if ever.
>>>    Alex
>>
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