[j-nsp] Limit on interfaces in bundle

Adam Vitkovsky Adam.Vitkovsky at gamma.co.uk
Mon Nov 2 13:30:00 EST 2015


        Adam Vitkovsky
        IP Engineer

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-----Original Message-----
> From: Jesper Skriver [mailto:jesper at 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.


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