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[bmwg] Some feedback on draft-novak-bmwg-ipflow-meth-00.txt



Hi Jan,
Here are a few comments on your draft.

- In the active and inactive timeout, I would express in terms of flow 
expiration.
You refer to draft-ietf-ipfix-architecture-12.txt section 5.1.1., good! 
However, why not revert the definition?
For inactive timeout, something such as:
if no packet of the flow has been seen for the inactive timeout, then the flow is expired.
- While you speak about:

  The network operator concern is always twofold:
      a. what will be CPU usage
      b. what will be the forwarding performance

I would add:
      c. bandwidth

- As I mentioned during the PMOL meeting, maybe we want to give a warning about generated traffic: 
if we use increasing IP addresses, then we might have more hash collisions than in real live cases
The next point is: do we want to have a metric for the hash collisions?

- Sometimes, I'm confused by too many new acronyms. Maybe it's just me...
"the BPU of the CPU does contain the FMPU on the UT" seems like 
we're talking an expert cryptic language  ;-) 
Now, I understand that the UT is a common term in BMWG

Regards, Benoit.
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