Mx204 alternative

Tue Sep 3 07:24:25 UTC 2019

Adam,

> On 2 Sep 2019, at 19:42, adamv0025 at netconsultings.com wrote:
> 
> You nailed it, 
> Actually very few line-cards or fabric-less boxes with (run to completion
> vendor chips) out there do line-rate at 64B packets nowadays.
> -with the advent of 100G the "line-rate at 64B" is pretty much not a thing
> anymore...
> Something to consider, not because one wants to push 64B packets at
> line-rate on all ports but because one needs to push IMIX through QOS or
> filters... and the card/box might simply not deliver.

But those are two completely different use cases.

The fact that vendors (full disclosure - I work for Cisco) don’t want to
optimize for 64 bytes forwarding is totally independent on how those
architectures deal/manage to apply policies on the traffic.

64B traffic simply doesn’t happen apart from DDoS scenarios, so
why bother at all? Customers anyway want to use dedicated
anty-DDoS boxes, so apart from synthetic performance testing,
pushing the architecture to be able to forward couple of mpps more
just to cover the “64B” scenario means $ (sometimes $$$) just
to satisfy requirement that’s usually simply not there.

In other words, the fact that given architecture can’t forward "wire-rate"
of 64B traffic doesn’t mean that it can’t apply QoS for IMIX pattern
at wire-speed. Forwarding engine is usually different part of
hardware than services, more often than not decisions are totally
independent to speed up processing.

-- 
Łukasz Bromirski
CCIE R&S/SP #15929, CCDE #2012::17, PGP Key ID: 0xFD077F6A
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