Hi Erik,

You are correct, for IPV6 RFC8029 mentions 0:0:0:0:0:FFFF:7F00:0/104.

Regards,
Reshad.

On 2020-07-20, 10:30 AM, "Erik Auerswald" <[email protected]> wrote:

    Hello Reshad,

    while the I-D draft-nainar-mpls-lsp-ping-yang-00 only specifies ::1/128
    as IPv6 loopback address, RFC 8029 sections 2.1., 3.4.1.1.1., and 4.3.
    specify to use the IPv4 loopback range as IP4-mapped IPv6 addresses for
    IPv6 MPLS echo request UDP packets, not the IPv6 loopback address ::1/128.

    This seems to be inconsistent to me.

    Best regards,
    Erik

    On Mon, Jul 20, 2020 at 01:39:02PM +0000, Reshad Rahman (rrahman) wrote:
    > I don't understand the comment "...implementation choice of one 
manufacturer."
    > 
    > As for the details, see 
https://tools.ietf.org/html/draft-nainar-mpls-lsp-ping-yang-00
    > 
    > Regards,
    > Reshad.
    > 
    > 
    > On 2020-07-20, 4:47 AM, "netmod on behalf of tom petch" 
<[email protected] on behalf of [email protected]> wrote:
    > 
    >     I am not a fan of loopback seeing it as the implementation choice of 
one manufacturer.  On the other hand, the IETF has defined documentation 
addresses which many if not most writers of examples for YANG modules seem 
unaware of so if we add anything, I would add those.
    > 
    >     Tom Petch
    > 
    >     From: netmod <[email protected]> on behalf of Juergen 
Schoenwaelder <[email protected]>
    >     Sent: 17 July 2020 20:25
    > 
    >       - There was a request to add types for loopback addresses
    >         (127.0.0.0/8 and ::1/128).
    > 
    >       - This is related to an effort to define a YANG module for MPLS LSP
    >         Ping (RFC 8029) but the details are unclear, i.e., what is exactly
    >         needed and how such a type will be used and whether there is a
    >         common need for types for loopback addresses.
    > 
    >       - Proposal: do not add such types at this point in time
    > 
    >     --
    >     Juergen Schoenwaelder           Jacobs University Bremen gGmbH
    >     Phone: +49 421 200 3587         Campus Ring 1 | 28759 Bremen | Germany
    >     Fax:   +49 421 200 3103         <https://www.jacobs-university.de/>

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