[f-nsp] ICX6650 / ICX7750 queue mapping

[Chris Wopat]

Curious if anyone has a doc that shows default queue mappings on ICX
platforms. 6650 appears to have 8 queues per interface.

With default config, most traffic is 0 (so I presume that's BE), but I see
traffic in 6 and 7 as well. I would guess that it's mapping 6/7 to network
control depending on what type of packet, but it would be nice to know for
sure. Some docs say 7 is used for stacking depending on platform, but
although we're not stacking we see lots of packets in that queue.

Ideally I'm looking for the ICX equivalent docs:

https://www.juniper.net/documentation/en_US/junos/topics/concept/forwarding-classes-default-cos-config-guide.html

https://www.juniper.net/documentation/en_US/junos/topics/reference/general/hw-cos-default-re-queues-reference-cos-config-guide.html

.. which show default queue types per platform + which type of packets
generated from the device are in which queue.

I've configured some queue mappings to map pretty much everything AWAY from
queue 7, yet it still gets hits, so who knows. This particular config is on
a 6650 running 8.0.10m.

#show qos-tos
DSCP-->Traffic-Class map: (DSCP = d1d2: 00, 01...63)

     d2|  0   1   2   3   4   5   6   7   8   9
  d1   |
  -----+----------------------------------------
   0   |  0   0   0   0   0   0   0   0   0   0
   1   |  0   0   0   0   0   0   0   0   0   0
   2   |  0   0   0   0   0   0   0   0   0   0
   3   |  0   0   0   0   2   0   2   0   2   0
   4   |  0   0   0   0   0   0   5   0   6   0
   5   |  0   0   0   0   0   0   6   0   0   0
   6   |  0   0   0   0
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