Re: RA Option Guidelines

[Alexandru Petrescu <[e-mail]>]

Le 03/04/2015 21:16, Brian E Carpenter a écrit :
> I'm glad y'all have got DHCPv6 sorted out. Now, as to the original
> subject of this thread: On 01/04/2015 08:26, Brian E Carpenter
> wrote:
>> On 01/04/2015 03:27, Hemant Singh (shemant) wrote: ...
>>> Also, why does one need an RA Option Guideline?  RFC4861
>>> specifies a TLV format and an option Type.   I don't see
>>> anything else needed if I need to specify a new RA option.
>>
>> Section 9 "Extensibility - Option Processing" gives some general
>> advice, too.
>>
>> The question is what do we collectively want. I liked Mark's
>> restrictive criterion "RA options should be limited to
>> link-local/subnet specific parameters (i.e., layer 3 parameters
>> only)". DHCPv6 is available as the kitchen sink protocol for other
>> stuff. I'm not sure whether we want to write this down; it seems
>> as if  one or two sentences should be added to RFC4861bis if there
>> ever is such a document.
>
> Do we actually agree on this, or rather on a slightly expanded
> version:
>
> RA options should be limited to link-local/subnet specific parameters
> (i.e., layer 3 parameters only) necessary for a simple unmanaged
> network. The only exception is RFC 6106 (DNS Configuration). More
> complex situations are better handled by other configuration metods
> such as DHCPv6.

It makes sense.

But, would it be possible to tell link-local subnet of a particular
Router?  I am asking because currently it is the link-local subnet of
one particular interface, the "on-link" prefix;  and it would be good to
allow a prefix in one subnet of an interface of a router be announced on
another interface of same router as "other prefix nearby".

And still forbid one Router to read an RA and propagate its contents
further down the network.

Alex


>
> Brian
>
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