RE: [16NG] Re: Last Call: draft-ietf-16ng-ipv6-over-ipv6cs (IPv6 Over the IP Specific part of the Packet Convergence sublayer in 802.16 Networks) to Proposed Standard

[qinxia <[e-mail]>]

Hello all,

            My two cents. Please see inline.
Best wishes,
alice
> -----Original Message-----
> From: Basavaraj Patil [mailto:[e-mail]]
> Sent: Thursday, March 15, 2007 4:13 AM
> To: ext Alexandru Petrescu
> Cc: [e-mail]; [e-mail]; IETF-Announce; [e-mail]
> Subject: Re: [16NG] Re: Last Call: draft-ietf-16ng-ipv6-over-ipv6cs (IPv6
Over
> the IP Specific part of the Packet Convergence sublayer in 802.16
Networks)
> to Proposed Standard
> 
> 
> Alex,
> 
> 
> On 3/14/07 11:47 AM, "ext Alexandru Petrescu"
<[e-mail]>
> wrote:
> 
> > Basavaraj Patil wrote:
> >> Hello,
> >>
> >> A slightly revised version of the I-D is now available at:
> >>
> http://people.nokia.net/~patil/IDs/draft-ietf-16ng-ipv6-over-ipv6cs-09.txt
> >>
> >> This revision incorporates changes based on some of the comments made
by
> the
> >> directorate. It will be submitted to the ID repository as soon as the
gates
> >> are opened.
> >
> > Raj, is there a plan to deal with the interoperability issue where the
> > AP tells the Station to auto-configure statelessly and the AR tells it
> > statefully?
> >
[qinxia] 
My question is what is the situation when AP select different address
configuration with AR?  IMHO, it is up to deployment.

> > The AP may send REG-RSP telling the Station to use DHCP.
> >
[qinxia]  address configuration is indicated over RA. This is enough.

> > The AR may send an RA telling the Station to use SLAAC.
> 
> The issue arises when we consider managed and unmanaged hosts as defined
by
> 802.16. Managed hosts are the ones that may use the secondary management
> connection. Secondary management connection is optional and as we have
> discussed in the past this is an option in the .16 specs that exists but
> very likely unused. I can tell you that in the case of Mobile WiMAX the
> secondary management connection is not used.
> 
> I agree that a BS and the AR should be synchronized in terms of what
method
> is indicated to the MS for address configuration.

[qinxia]  sure, SMC may not be exist. However, RA may be transported over
regular connection. RA could be used to indicate the address configuration. 
> 
> >
> > There may be an interoperability issue, if the two indicators are
different.
> 
> Yes.
> 
> >
> > This issue can of course be considered as a network management issue,
> > where advice could be given to network deployers of AR and AP to
> > configure their networks correctly.
> 
> Correct. A deployment should be able to ensure that the indication to the
MS
> in the REG-RSP and RA are synchronized. I can add some text in the I-D to
> ensure that this issue is noted in the address configuration section.
> 
> >
> > And this is a time when both 802.16 is changing (Corrigendum 2 under
> > discussion but still allows AP to indicate to MN what autoconf method to
> > use) and the RA definition is changing (draft-2462bis indicates 'M' flag
> > may not be used, but an 'autonomous' flag instead).
> >
> > What do you think?  Do I get this issue correctly?  Or is the issue
> > important, less important, etc.
> 
> This is a valid issue but I think it can be clarified in the I-D itself by
> recognizing it and recommending that the indication by the BS and AR are
> synced. We can also mention it to IEEE but that is about the scope of
things
> that we can do.
> 
> -Raj
> 
> >
> > Thanks,
> >
> > Alex
> >
> >
> > ______________________________________________________________________
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> 
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