[ipv6-wg] [v6ops] Extension Headers / Impact on Security Devices

Hi,

On Wed, Jun 17, 2015 at 03:27:50PM +0200, sthaug at nethelp.no wrote:
> > So we all agree that 'variable length is OK as long as our hardware
> > can look deep enough'? And what people are complaining about is exact
> > number? Which we do not know yet for IPv6 EHs?
> 
> Agreed, variable length *by itself* is not the problem.
> 
> I see *large* variable length headers, in combination with complex
> parsing rules, as the problem.

(*large* variable headers) exactly, plus fragmentation and "ambiguities" wrt fragmentable vs. unfragmentable part and how headers point to the next one once there's a cut between them due to fragmentation. the, what we consider, "problem space" is much larger, unfortunately.

thanks

Enno





> 
> Steinar Haug, AS 2116
> 
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