RE: ICMPv6 "too-big" packets ignored (filtered ?) by Cloudflare farms

[<adamv0025 () netconsultings com>]

Hey Saku,
> From: Saku Ytti <saku () ytti fi>
> Sent: Tuesday, March 12, 2019 11:54 AM
>
> Hey Adam,
>
> > We did this exact testing a while back on Juniper 2nd and 3rd gen PFEs.
> > The results showed it doesn't matter a tiny bit whether you do 5-tuple hash
> or use flow label.
> > So the bottom line is on modern NPUs it doesn't really matter.
>
> Does PFE mean PE or Trio? What exactly did you test? I don't see way to
> disable L3+L4 keys and enable flow_label.
This was on Trio and sorry I should have clarified we did test with default L3+L4 keys on MPLS labelled packets 
-default in Junos (as baseline). 
And then repeated the test using flow labels -which forced Trio to ignore the L3+L4 keys and act solely on flow label. 
PPS performance wise we couldn’t really tell the difference (was in the noise).   

adam