SRv6 Capable NOS and Devices

Dale W. Carder dwcarder at
Wed Jan 12 17:43:25 UTC 2022

Thus spake Sander Steffann (sander at 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 
this is more pronounced with respect to the various SRv6 compression scheme proposals.


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