Re: [Int-area] comment on draft-ietf-intarea-gre-ipv6

Hi Lucy,

Also, you say:

>  [Lucy] RFC2473 is about IPv6 in IPv6, i.e., IPv6 as a delivery network for IPv6 traffic.

but that is not correct. RFC2473 is about "Generic Packet Tunneling in IPv6", which
could include encapsulation of IPv4, IPv6, or other network protocols - and not just
IPv6 within IPv6 encapsulation.

Thanks - Fred
fred.l.templin@boeing.com

> -----Original Message-----
> From: Int-area [mailto:int-area-bounces@ietf.org] On Behalf Of Templin, Fred L
> Sent: Monday, March 09, 2015 7:52 AM
> To: Lucy yong; Ronald Bonica; int-area@ietf.org
> Subject: Re: [Int-area] comment on draft-ietf-intarea-gre-ipv6
> 
> 
> 
> > -----Original Message-----
> > From: Lucy yong [mailto:lucy.yong@huawei.com]
> > Sent: Sunday, March 08, 2015 10:05 AM
> > To: Templin, Fred L; Ronald Bonica; int-area@ietf.org
> > Subject: RE: [Int-area] comment on draft-ietf-intarea-gre-ipv6
> >
> > Hi Templin,
> >
> >
> > > -----Original Message-----
> > > From: Int-area [mailto:int-area-bounces@ietf.org] On Behalf Of Lucy
> > > yong
> > > Sent: Thursday, March 05, 2015 12:09 PM
> > > To: Ronald Bonica; int-area@ietf.org
> > > Subject: Re: [Int-area] comment on draft-ietf-intarea-gre-ipv6
> > >
> > > Hi Ron,
> > >
> > > RFC2784 has this statement: See [RFC1122] for requirements relating to the
> > >    delivery of packets over IPv4 networks.
> > > Does this apply to over IPv6 networks?
> > >
> > > Since IPv6 header does not have checksum, if a packet is mis-delivered
> > > to GRE decapsulator, will that cause a concern? This is not a concern when IPv4 network is the delivery network.
> >
> > In terms of header integrity checks, they are very much in the same boat as RFC2473.
> > But, somehow that got standardized.
> > [Lucy] RFC2473 is about IPv6 in IPv6, i.e., IPv6 as a delivery network for IPv6 traffic. Since IPv6 packets and upper layer applications
> > have to follow RFC2460, i.e., protect the misdelivery and corruption, so that is OK if there is only such kind of tunnel in IPv6. GRE-in-
> > IPv6 is deferent. They can't be in the same boat. If there are various network protocols that are tunneled over a same IPv6 network,
> it
> > will have a problem due to packet misdelivery and corruption. IMO: the draft needs to document these.
> 
> Oh, I thought you were concerned about lack of an integrity check for the encapsulating
> IPv6 header. Are you saying that (in the RFC2473 case at least) it is OK to omit an integrity
> check for the encapsulating IPv6 header as long as there is an integrity check for the
> encapsulated IP header? But, somehow that is not OK for draft-ietf-intarea-gre-ipv6?
> 
> Thanks - Fred
> fred.l.templin@boeing.com
> 
> > Thanks,
> > Lucy
> >
> > Thanks - Fred
> > fred.l.templin@boeing.com
> >
> > > Thanks,
> > > Lucy
> > >
> > >
> > > -----Original Message-----
> > > From: Ronald Bonica [mailto:rbonica@juniper.net]
> > > Sent: Thursday, March 05, 2015 11:57 AM
> > > To: int-area@ietf.org; Lucy yong
> > > Subject: RE: [Int-area] comment on draft-ietf-intarea-gre-ipv6
> > >
> > > Hi Lucy,
> > >
> > > The goal of this draft is *not* to prove the GRE behaves identically
> > > with IPv6 as it does with IPv4. In fact, its goal is to point out the differences.
> > >
> > > Can you think of any differences between the two GRE environments that we have failed to point out?
> > >
> > >
> > > Ron
> > >
> > >
> > > >
> > > > Message: 1
> > > > Date: Wed, 4 Mar 2015 15:25:54 +0000
> > > > From: Lucy yong <lucy.yong@huawei.com>
> > > > To: "int-area@ietf.org" <int-area@ietf.org>
> > > > Subject: [Int-area] comment on draft-ietf-intarea-gre-ipv6
> > > > Message-ID: <2691CE0099834E4A9C5044EEC662BB9D4545BB21@dfweml701-
> > > > chm>
> > > > Content-Type: text/plain; charset="us-ascii"
> > > >
> > > > Hi,
> > > >
> > > > If this draft is to document the protocol of gre in IPv6 exact same
> > > > as of gre in
> > > > IPv4 and update rfc2784, IMHO, it should point out the gre
> > > > application behavior differences in IPv4 network and IPv6 network.
> > > > The exact same protocol does not mean the same behavior for an
> > > > application since IPv4 and
> > > > IPv6 networks have different behaviors such as header checksum.
> > > >
> > > > Thanks,
> > > > Lucy
> > > >
> > > >
> > > >
> > > >
> > >
> > > _______________________________________________
> > > Int-area mailing list
> > > Int-area@ietf.org
> > > https://www.ietf.org/mailman/listinfo/int-area
> 
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