Public bug reported:
The QoS values defined in the LSP.options field are directly translated to a TC
command and set in the interface. There are 3 values [1]:
* qos_min_rate
* qos_max_rate
* qos_burst
Neutron is currently using "qos_min_rate" only. The max-BW and DSCP QoS
rules are defined with QoS registers that match an input/output port
traffic.
As specified in [2], the "rate" parameter ("qos_max_rate") is mandatory.
The "ceil" parameter ("qos_min_rate") is not. Neutron needs to provide a
default "qos_max_rate" for any port where "qos_min_rate" is configured
(as commented, we are only using "qos_min_rate").
[1]https://github.com/ovn-org/ovn/blob/1bec9e3ddd8500793b52e11c3dc1f41ef1f48591/ovn-nb.xml#L1155-L1168
[2]https://man7.org/linux/man-pages/man8/tc-htb.8.html
** Affects: neutron
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2015376
Title:
[OVN] min-BW rule, defined in the LSP.options field, must be
accompanied with a max-BW value
Status in neutron:
New
Bug description:
The QoS values defined in the LSP.options field are directly translated to a
TC command and set in the interface. There are 3 values [1]:
* qos_min_rate
* qos_max_rate
* qos_burst
Neutron is currently using "qos_min_rate" only. The max-BW and DSCP
QoS rules are defined with QoS registers that match an input/output
port traffic.
As specified in [2], the "rate" parameter ("qos_max_rate") is
mandatory. The "ceil" parameter ("qos_min_rate") is not. Neutron needs
to provide a default "qos_max_rate" for any port where "qos_min_rate"
is configured (as commented, we are only using "qos_min_rate").
[1]https://github.com/ovn-org/ovn/blob/1bec9e3ddd8500793b52e11c3dc1f41ef1f48591/ovn-nb.xml#L1155-L1168
[2]https://man7.org/linux/man-pages/man8/tc-htb.8.html
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