[j-nsp] Netflow config for MX204

[adamv0025 at netconsultings.com]

> From: Saku Ytti <saku at ytti.fi>
> Sent: Friday, April 17, 2020 8:49 AM
> 
> On Fri, 17 Apr 2020 at 10:39, <adamv0025 at netconsultings.com> wrote:
> 
> > Can you expand on the above please?
> > Say comparing RE/RSP management port on ASR9k and MX,
> 
> No management port is revenue port, and will kill your flow export, if flow
> export is supported directly from the NPU. Because if it works, it means NPU
> has to _punt_ the traffic to control-plane, to export it.
> Where as if NPU supports exporting off the NPU, then exporting from non-
> revenue ports can be done without touching control-plane or stealing punt
> capacity.
> If flow is exported by the RE, it's much less important.
> 
Yup this bit was clear, actually on this one, when I was searching I stumbled upon a XR-9k cmd to enable connecting management port to fabric ... "rp mgmtethernet forwarding"

> I would personally not use any RE attached ETH port for any purpose.
> However I'd happily use ASR9k CMP port or Cisco 8k BMC port for out-of-
> band.
> 
Aah that clears it up, sure BMC like OOB (CMP included) is the true separate management plane. 
Sorry I was wondering how is standard management ethernet port on RSP not sharing control plane -I can point static routes at it after all.... so yeah didn't occur to me you were referring to BMC OOB MGMT ports there.

adam