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[Arkady Shtempler <1781915@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

### General Description ###
There is a “Proposed Change” regarding “QoS DSCP marking support” as it documented in:
http://specs.openstack.org/openstack/neutron-specs/specs/newton/ml2-qos-with-dscp.html

We propose an update to the QoS API and OVS driver to support DSCP
marks. Valid DSCP mark values can be between 0 and 56, except 2-6, 42,
44, and 50-54.


### Test scenario ###
1) ssh to your Undercloud host
2) switch to “stack” user with: “su – stack“
3) Source overcloudrc file with: “source overcloudrc” 
4) Upload the attached “Check_DSCP_Options.py” Python script (inside the attached *.zip) to your home directory (stack home) and run it with “python Check_DSCP_Options.py” command while monitoring “server.log” on your controller node.


### Expected Result ###
Valid DSCP mark values can be between 0 and 56, except 2-6, 42, 44, and 50-54.

### Actual Result ###
1) Failed DSCP mark IDs:
[1, 2, 3, 4, 5, 6, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39, 41, 42, 43, 44, 45, 47, 49, 50, 51, 52, 53, 54, 55]

2) As you can see we do have supported and not DSCP Mark IDs, but it has
different behavior than expected.

3) You can find the controller “server.log” attached (inside attached
*.zip) and you can see there messages like this one:

2018-07-02 15:04:58.535 28 INFO neutron.api.v2.resource [req-
74bb7060-b9b2-4542-bd8a-d805a8ff079c b4332e1592ab480f96fc87e5af797895
f3f03848a45746c7bcbe95b625d7e1d8 - default default] update failed
(client error): Invalid input for dscp_mark. Reason: 55 is not in
valid_values.

for all mentioned IDs:

[ashtempl@ashtempl ~]$ grep -i 'is not in' server.log | cut -d ':' -f5
 1 is not in valid_values.
 2 is not in valid_values.
 3 is not in valid_values.
 4 is not in valid_values.
 5 is not in valid_values.
 6 is not in valid_values.
 7 is not in valid_values.
 9 is not in valid_values.
 11 is not in valid_values
 13 is not in valid_values.
 15 is not in valid_values.
 17 is not in valid_values.
 19 is not in valid_values.
 21 is not in valid_values.
 23 is not in valid_values.
 25 is not in valid_values.
 27 is not in valid_values.
 29 is not in valid_values.
 31 is not in valid_values.
 33 is not in valid_values.
 35 is not in valid_values.
 37 is not in valid_values.
 39 is not in valid_values.
 41 is not in valid_values.
 42 is not in valid_values.
 43 is not in valid_values.
 44 is not in valid_values.
 45 is not in valid_values.
 47 is not in valid_values.
 49 is not in valid_values.
 50 is not in valid_values.
 51 is not in valid_values.
 52 is not in valid_values.
 53 is not in valid_values.
 54 is not in valid_values.
 55 is not in valid_values.

** Affects: neutron
     Importance: Undecided
         Status: New


** Tags: qos

** Attachment added: "QoS_DSCP_IDs.zip"
   https://bugs.launchpad.net/bugs/1781915/+attachment/5164160/+files/QoS_DSCP_IDs.zip

** Tags added: qos

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https://bugs.launchpad.net/bugs/1781915

Title:
  QoS (DSCP Mark IDs) – No correlation between the implemented
  functionality and design

Status in neutron:
  New

Bug description:
  ### General Description ###
  There is a “Proposed Change” regarding “QoS DSCP marking support” as it documented in:
  http://specs.openstack.org/openstack/neutron-specs/specs/newton/ml2-qos-with-dscp.html

  We propose an update to the QoS API and OVS driver to support DSCP
  marks. Valid DSCP mark values can be between 0 and 56, except 2-6, 42,
  44, and 50-54.

  
  ### Test scenario ###
  1) ssh to your Undercloud host
  2) switch to “stack” user with: “su – stack“
  3) Source overcloudrc file with: “source overcloudrc” 
  4) Upload the attached “Check_DSCP_Options.py” Python script (inside the attached *.zip) to your home directory (stack home) and run it with “python Check_DSCP_Options.py” command while monitoring “server.log” on your controller node.

  
  ### Expected Result ###
  Valid DSCP mark values can be between 0 and 56, except 2-6, 42, 44, and 50-54.

  ### Actual Result ###
  1) Failed DSCP mark IDs:
  [1, 2, 3, 4, 5, 6, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39, 41, 42, 43, 44, 45, 47, 49, 50, 51, 52, 53, 54, 55]

  2) As you can see we do have supported and not DSCP Mark IDs, but it
  has different behavior than expected.

  3) You can find the controller “server.log” attached (inside attached
  *.zip) and you can see there messages like this one:

  2018-07-02 15:04:58.535 28 INFO neutron.api.v2.resource [req-
  74bb7060-b9b2-4542-bd8a-d805a8ff079c b4332e1592ab480f96fc87e5af797895
  f3f03848a45746c7bcbe95b625d7e1d8 - default default] update failed
  (client error): Invalid input for dscp_mark. Reason: 55 is not in
  valid_values.

  for all mentioned IDs:

  [ashtempl@ashtempl ~]$ grep -i 'is not in' server.log | cut -d ':' -f5
   1 is not in valid_values.
   2 is not in valid_values.
   3 is not in valid_values.
   4 is not in valid_values.
   5 is not in valid_values.
   6 is not in valid_values.
   7 is not in valid_values.
   9 is not in valid_values.
   11 is not in valid_values
   13 is not in valid_values.
   15 is not in valid_values.
   17 is not in valid_values.
   19 is not in valid_values.
   21 is not in valid_values.
   23 is not in valid_values.
   25 is not in valid_values.
   27 is not in valid_values.
   29 is not in valid_values.
   31 is not in valid_values.
   33 is not in valid_values.
   35 is not in valid_values.
   37 is not in valid_values.
   39 is not in valid_values.
   41 is not in valid_values.
   42 is not in valid_values.
   43 is not in valid_values.
   44 is not in valid_values.
   45 is not in valid_values.
   47 is not in valid_values.
   49 is not in valid_values.
   50 is not in valid_values.
   51 is not in valid_values.
   52 is not in valid_values.
   53 is not in valid_values.
   54 is not in valid_values.
   55 is not in valid_values.

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