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Re: [v6ops] draft-ietf-v6ops-64share WGLC

Mark ZZZ Smith <markzzzsmith@yahoo.com.au> Mon, 23 September 2013 20:07 UTC

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Date: Mon, 23 Sep 2013 13:07:16 -0700
From: Mark ZZZ Smith <markzzzsmith@yahoo.com.au>
To: Alexandru Petrescu <alexandru.petrescu@gmail.com>, "v6ops@ietf.org" <v6ops@ietf.org>
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Subject: Re: [v6ops] draft-ietf-v6ops-64share WGLC
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>________________________________
> From: Alexandru Petrescu <alexandru.petrescu@gmail.com>
>To: v6ops@ietf.org 
>Sent: Tuesday, 24 September 2013 12:09 AM
>Subject: Re: [v6ops] draft-ietf-v6ops-64share WGLC
> 
>
>Le 19/09/2013 23:26, Teemu Savolainen a écrit :
>>  > >Secondly, I don't agree DHCP server support is required, as the CE
>> can include the DNS addresses in RAs as specified in RFC6106.
>>  > >
>>  >
>>  > How could a CE convey NTP server settings to hosts using RAs?
>> Accurate host time is pretty useful, if not essential.
>>
>> It cannot, but then again it probably would not help to have DHCP server
>> implementation either, as, AFAIK, cellular networks commonly today do
>> not provide DHCP service to terminals (to these "CEs" that would use
>> 64share instead of DHCPv6 PD)....
>
>In addition to considering whether or not the cellular network delivers 
>DHCP, one should consider whether or not the local USB dongle delivers 
>DHCP to the Host.
>
>This or someone other unknown entity in the middle, between the network 
>and the host, delivers DHCP and make that link look like ARP-capable 
>link.  The QMI drivers and clients in linux see new evolutions in that 
>sense.
>
>But that is more like future work; 64share has place here where QMI is 
>not yet widely deployed.
>
>> If CE has no NTP settings, it cannot
>> share them either. CE often gets time from cellular network, though.. So
>> maybe CE should implement NTP server and with DHCP share its own address
>> as NTP address?
>
>CE to run a DHCPv6 Server?
>

I think the CE should run a DHCPv6 relay, not a DHCPv6 server. Otherwise, the parameters the upstream "network" and the downstream hosts can receive are constrained by the DHCPv6 option support of the DHCPv6 client/server in the CE device. This is what I've discussed, including how I think stateful DHCPv6 addressing could be handled on the downstream interface, in

"IPv6 CE Device DHCPv6 Option Transparency"

http://tools.ietf.org/html/draft-smith-v6ops-ce-dhcpv6-transparency-00






>> ... And this is why it is best to focus 64share to just prefix sharing;-)
>
>In a sense I agree to let 64share just do the prefix sharing.
>
>But obviously the client on the LAN side needs a way to get a DNS server 
>address otherwise its connectivity is only partial.
>
>Alex
>
>>
>> Best regards,
>>
>> Teemu
>>
>>
>>
>> _______________________________________________
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>> v6ops@ietf.org
>> https://www.ietf.org/mailman/listinfo/v6ops
>>
>
>
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