Re: [v6ops] [OPSEC] I-D Action: draft-gont-opsec-ipv6-eh-filtering-00.txt

[Joe Touch <[e-mail]>]

On 7/17/2014 1:59 PM, Fernando Gont wrote:
> On 07/16/2014 11:09 AM, Joe Touch wrote:
>> >
>> >I'm including INTAREA in the discussion because this doc seems to be an
>> >end-run around intending to deprecate IPv6 HBH options, or at least to
>> >redefine the option behavior bits defined in RFC 2460. IMO, that ought
>> >to be addressed in INTAREA, not V6OPS.
 >
> May I ask if you have read the I-D? Because this document is not trying
> to do any of the above. ...

 From draft-gont-opsec-ipv6-eh-filtering-00.txt:

2.3.1.5. Advice

    Intermediate systems should, by default, drop packets containing a
    IPv6 Hop-by-Hop Option Extension Header.

The currently required behavior of HBH option type "00" in RFC2460:

4.2 Options

    Two of the currently-defined extension headers -- the Hop-by-Hop
    Options header and the Destination Options header -- carry a variable
    number of type-length-value (TLV) encoded "options", of the following
    format:
...
    The Option Type identifiers are internally encoded such that their
    highest-order two bits specify the action that must be taken if the
    processing IPv6 node does not recognize the Option Type:

       00 - skip over this option and continue processing the header.

       ...