TCP options are quite different from IP options.

IP options are annoying in big fast routers because they have to take the slow route via CPU. As there's not a lot of use in accepting packets (externally at least) with IP options, they tend to be dropped totally (but will almost certainly be policed aggressively to the CPU as the CPU is not good for moving many packets).

uhh.. i dont think amd or intel has even attempted to make a s/n accessible on their CPUs since the big stink in the 90's.

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