>
Adam Vitkovsky
IP Engineer
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-----Original Message-----
> From: Jesper Skriver [mailto:jes...@skriver.dk]
> Sent: Monday, November 02, 2015 5:14 PM
>
>
> Right, on those types of platforms it can be done - assuming there are spare
> bits in the meta data that goes with the packet, enough free instruction
> space etc - but it will come at a performance impact as it will require more
> cycles per packet, unless on the particular platform there is still headroom
> for
> adding more cycles without affecting the ability to be linerate ...
>
Talking about lookup performance isn't the number of cycles negligible compared
to memory access times please?
Even the high-end platforms of all vendors will cripple performance when
features are enabled.
> Which is why I in my original reply said that it would not be practical. For
> it to
> be useful all routers in the path needs to support it, otherwise as soon as it
> hits one that doesn't all the various MPLS sub-types will get mixed together
> again.
> Features which require network wide support are quite hard to get off the
> ground.
>
Maybe this could get shoehorned along with segment routing.
adam
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