Thus spake Sander Steffann (san...@steffann.nl) on Wed, Jan 12, 2022 at 
06:21:25PM +0100:
> Hi,
> 
> > No SRv6 is MPLS labeling where label is carried inside IP instead
> > before the IP header. Layering violation which increases complexity
> > and cost for no other purpose except dishonest marketing about 'it is
> > IP, you already understand it, MPLS is hard'.
> 
> What worries me more is the opportunity for adversaries to inject SRv6 
> packets. MPLS is not enabled by default on most router interfaces, so an 
> adversary would have to have access to an interface where MPLS processing is 
> explicitly enabled. IPv6 packet processing on the other hand… Unless an 
> operator has airtight protection on every interface to block unwanted SRv6 
> headers I see some interesting opportunities to cause havoc :)

You are not alone, see for example the thread at
https://mailarchive.ietf.org/arch/msg/v6ops/GbWiie-bjQ_Bp1JKB1PlDh_fPdc/ 
this is more pronounced with respect to the various SRv6 compression scheme 
proposals.

Dale

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