Re: [Mip6] [issue94] fixing encapsulation mechanism in IPv4 network

[Alexandru Petrescu <alexandru.petrescu at gmail.com>]

I agree only one encapsulation mechanism (for traversing IPv4) is 
something useful, as opposed to implementing always two encapsulating 
mechanisms.

I'm not sure that UDP is the right answer for that.  IPv4-in-IPv4 
mechanisms (without UDP) have their advantages: less packet overhead. 
They have inconvenients that they should be mainly in kernelspace 
(constraints).

Would it be possible to have DS-MIPv6 implementation with one big MIB 
knob that says:
-use UDP for BU signalling, traffic encap and NAT traversal.
or
-use IPv4-in-IPv4 for BU signalling, traffic encap and NAT traversal.

But I'll agree with what's suggested as already implemented.

Alex

Keiichi SHIMA wrote:
> New submission from Keiichi SHIMA <keiichi at iijlab.net>:
>
> The current DSMIPv6 draft specifies two encapsulation formats, one is the IPv4 encap format, the other is 
> UDPv4 encap format.  The default encapsulation format is the IPv4 format, and if the HA explicitly 
> specifies to change the encapsulation format to the UDPv4 format if there is a NAT box between the HA 
> and the MN.  Because of this specification, HA and MN have to support both encapsulation formats and 
> have to change the format dynamically, that may increase the hurdle for implementors and may cause 
> complexity in interoperability.
>
> Isn't it possible to fix the encapsulation format to one of these mechanisms described in the draft?
>
> ----------
> category: Technical
> draft: draft-ietf-mip6-nemo-v4traversal
> messages: 338
> nosy: keiichi
> priority: May fix
> status: No discussion
> title: fixing encapsulation mechanism in IPv4 network
>
> _________________________________________________
> Mip6 issue tracker <tracker-mip6 at mip4.org>
> <http://www.mip4.org/issues/tracker/mip6/issue94>
> _________________________________________________
>
> _______________________________________________
> Mip6 mailing list
> Mip6 at ietf.org
> https://www1.ietf.org/mailman/listinfo/mip6


______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please visit http://www.messagelabs.com/email 
______________________________________________________________________

_______________________________________________
Mip6 mailing list
Mip6 at ietf.org
https://www1.ietf.org/mailman/listinfo/mip6