Re: [BEHAVE] I-D Action:draft-ietf-behave-v4v6-bih-01.txt

[<[e-mail]>]

Hi,

Please comment on the revision -01. Main changes:
- Clarifications that BIH should not be used when there is IPv4 path
- Clarification that lacking all other IPv4 paths, then BIH can translate IPv4 to IPv6 even if destination has (totally unreachable) IPv4 addresses 
- First proposal for source and destination IPv4 address blocks to be used (section 4.3)
	- source: 172.21.112.0/30
	- Primary destination: 172.21.80.0/20
	- Secondary destination: 10.170.160.0/20
- Comment of checksum calculation need
- Clarification about ENR behavior in case of A record only (pass to application for cleaner failure)
- Some more details to reverse DNS lookup procedures
- Compression of address mapper section and focus to only scenarios in scope
- Multi-interface considerations, especially when real IPv4 interface opens (no new session through BIH, existing may be terminated - implementation choice)
- Multicast consideration: not supported
- DNS cache consideration: if applicable, must be flushed when BIH closes
- Acknowledgement for BIW

Plenty of time until Monday, so -02 could easily be made to accommodate next patch of feedback:)

Best regards,

Teemu



> -----Original Message-----
> From: [e-mail] [mailto:[e-mail]] On
> Behalf Of ext [e-mail]
> Sent: 19. lokakuuta 2010 16:45
> To: [e-mail]
> Cc: [e-mail]
> Subject: [BEHAVE] I-D Action:draft-ietf-behave-v4v6-bih-01.txt
> 
> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
> This draft is a work item of the Behavior Engineering for Hindrance
> Avoidance Working Group of the IETF.
> 
> 
> 	Title           : Dual Stack Hosts Using "Bump-in-the-Host" (BIH)
> 	Author(s)       : B. Huang, et al.
> 	Filename        : draft-ietf-behave-v4v6-bih-01.txt
> 	Pages           : 24
> 	Date            : 2010-10-19
> 
> This document describes the "Bump-In-the-Host" (BIH), a host based
> IPv4 to IPv6 protocol translation mechanism that allows a subset of
> applications supporting only IPv4 to communicate with peers that are
> reachable only with IPv6.  A host may be connected to IPv6-only or
> dual-stack access network.  Essentially BIH makes the IPv4 applications
> think they talk to IPv4 peers and hence hides the existence of IPv6
> from those applications.
> 
> Acknowledgement of previous work
> 
> This document is an update to and directly derivative from Kazuaki
> TSHUCHIYA, Hidemitsu HIGUCHI, and Yoshifumi ATARASHI [RFC2767] and from
> Seungyun Lee, Myung-Ki Shin, Yong-Jin Kim, Alain Durand, and Erik
> Nordmark's [RFC3338], which similarly provides a dual stack host means
> to communicate with other IPv6 host using existing IPv4 appliations.
> This document combines and updates both [RFC2767] and [RFC3338].
> 
> The changes in this document reflect five components
> 
> 
> 1.  Supporting IPv6 only network connections
> 
> 
> 2.  IPv4 address pool use private address instead of the
> 
> unassigned IPv4 addresses (0.0.0.1 - 0.0.0.255)
> 
> 
> 3.  Extending ENR and address mapper to operate differently
> 
> 
> 4.  Adding an alternative way to implement the ENR
> 
> 
> 5.  Going for standards track instead of experimental/
> 
> informational
> 
> A URL for this Internet-Draft is:
> http://www.ietf.org/internet-drafts/draft-ietf-behave-v4v6-bih-01.txt
> 
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
> 
> Below is the data which will enable a MIME compliant mail reader
> implementation to automatically retrieve the ASCII version of the
> Internet-Draft.