RE: New Version Notification for draft-koodli-ipv6-in-mobile-networks-02

[<teemu.savolainen@nokia.com>]

Hi Rajeev,

I'm saying having DHCP for deferred address allocation is quite a host change:
1) a host has to support DHCP for 3GPP access at first place
2) a host has to support deferred DHCP for 3GPP access (reserve/release on-demand)
3) a host has to support negotiation of used address allocation mechanism for 3GPP access:
3a) A host will have to ask if DHCP is used for this particular PDN connection
3b) If DHCP is not used, host shall get the address from bearer signaling instead

Also in LTE the DHCP is optional for both host and network.

So what I'm also saying is that it is not so straightforward to use IPv4 on-demand with DHCP as I think the draft is implying (but maybe it is just my view), which is a concern for feasibility of this approach (recall how in 3GPP discussions getting transition mechanism changes to hosts was considered so hard).

This DHCPv4 on-demand sound for me quite like a host based transition mechanisms (DSTM without encapsulation?).

Furthermore, to gain real benefits a significant host population should support this, and it may or may not be a challenge depending on LTE deployment schedules and speed.

Best regards,

Teemu

> -----Original Message-----
> From: ext Koodli, Rajeev [mailto:rkoodli@cisco.com]
> Sent: 16. huhtikuuta 2010 20:53
> To: Savolainen Teemu (Nokia-D/Tampere); v6ops@ops.ietf.org
> Subject: RE: New Version Notification for draft-koodli-ipv6-in-mobile-
> networks-02
> 
> 
> Hi Teemu,
> 
> thanks for the input.
> 
> Agree to your point about adding IPv6 features and not IPv4.
> However, the description of DHCP-based addressing is for LTE, not 3G.
> And the description is about having DHCP as a mechanism to manage the
> available IPv4 addressing pool.
> Are you saying that it should not be available or should not be used?
> 
> Regards,
> 
> -Rajeev
> 
> 
> 
> -----Original Message-----
> From: teemu.savolainen@nokia.com [mailto:teemu.savolainen@nokia.com]
> Sent: Fri 4/16/2010 2:25 AM
> To: Koodli, Rajeev; v6ops@ops.ietf.org
> Subject: RE: New Version Notification for  draft-koodli-ipv6-in-mobile-
> networks-02
> 
> Hi Rajeev, all,
> 
> I'm worried about the on-demand DHCP based address allocation
> descriptions herein.
> 
> Majority of 3GPP devices do not implement DHCP at all today for 3GPP
> access, because it is optional and gives very little when compared to
> mandatory PPP-like address allocation during bearer establishment
> procedures.
> 
> Introduction of DHCP for significant host population (to get
> statistical savings) just for the deferred IPv4 address allocation
> feature does not sound right thing to do for me.
> 
> We should be adding IPv6 features to hosts, not IPv4 features.
> 
> Best regards,
> 
> Teemu
> 
> > -----Original Message-----
> > From: owner-v6ops@ops.ietf.org [mailto:owner-v6ops@ops.ietf.org] On
> > Behalf Of ext Rajeev Koodli
> > Sent: 16. huhtikuuta 2010 01:05
> > To: v6ops@ops.ietf.org
> > Subject: FW: New Version Notification for draft-koodli-ipv6-in-
> mobile-
> > networks-02
> >
> >
> > Hello folks,
> >
> > I was asked at the Anaheim meeting to clarify the intended audience
> for
> > this
> > ID, which I have done in the Introduction; this document can be a
> > useful
> > reference for service providers and network designers.
> > This ID does not propose any new protocols or suggest any new
> protocol
> > work.
> >
> > I also got a good review from Mohamed Boucadier (thanks!) which I
> have
> > addressed.
> >
> > It seemed there was good interest that this ID is useful.
> >
> > So, Chairs: how do we proceed?
> >
> > Thanks,
> >
> > -Rajeev
> >
> > http://tools.ietf.org/html/draft-koodli-ipv6-in-mobile-networks-02
> >
> >
> >
> > ------ Forwarded Message
> > From: IETF I-D Submission Tool <idsubmission@ietf.org>
> > Date: Tue, 13 Apr 2010 16:30:59 -0700 (PDT)
> > To: Rajeev Koodli <rkoodli@cisco.com>
> > Subject: New Version Notification for
> > draft-koodli-ipv6-in-mobile-networks-02
> >
> >
> > A new version of I-D, draft-koodli-ipv6-in-mobile-networks-02.txt has
> > been
> > successfully submitted by Rajeev Koodli and posted to the IETF
> > repository.
> >
> > Filename:  draft-koodli-ipv6-in-mobile-networks
> > Revision:  02
> > Title:   Mobile Networks Considerations for IPv6 Deployment
> > Creation_date:  2010-04-14
> > WG ID:   Independent Submission
> > Number_of_pages: 15
> >
> > Abstract:
> > Mobile Internet access from smartphones and other mobile devices is
> > accelerating the exhaustion of IPv4 addresses.  IPv6 is widely seen
> > as crucial for the continued operation and growth of the Internet,
> > and in particular, it is critical in mobile networks.  This document
> > discusses the issues that arise when deploying IPv6 in mobile
> > networks.  Hence, this document can be a useful reference for service
> > providers and network designers.
> >
> >
> >
> > The IETF Secretariat.
> >
> >
> >
> > ------ End of Forwarded Message
> >
>