On 15/06/2013 04:23, Ray Hunter wrote:
...
> What about nested Generic Packet Tunneling in IPv6 [rfc2473]?
>
> That'll add another 48 octets per nesting level. [fresh IPv6 tunnel
> header + destination options including IPv6 Tunnel Hop Limit]
>
> On the one hand I can see they'll be really useful, certainly during a
> transition period, to allow operators to bypass core devices that cannot
> cope with switching more complex header chains in hardware. On the other
> hand, their very ability to hide L4 headers and complex header chains
> will likely make them unlikely to survive traversing firewalls.
Exactly. Tunnels of any kind are considered very suspect, so I don't
think this is part of the same problem.
Brian
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