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qos
Tauran Bastien edited this page Apr 5, 2022
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Quality of Service (QoS) can be achieved for some configurations of OpenSAND:
- IP network with one default VLAN
- Ethernet network with several VLAN, can ping bridge interface
- Ethernet network with several VLAN, cannot ping bridge interface
For these configurations, QoS is based on the PCP field of the 802.1Q header of frames. The PCP field uses 3 bits, thus 8 different priorities can be assigned to the frames, the default one being priority zero (Best Effort).
Scripts are given in the QoS-capable configurations to allow a mapping between IP fileds (ToS, DSCP, adresses, ports, etc.) and PCP priorities. Complete explaination of these scripts is given alongside the Makefiles, for example here for the IP configuration.