| ==== Full example of QoS for osmo-mgw |
| |
| In the below example we will show the full set of configuration required |
| for both DSCP and PCP differentiation of RTP traffic by osmo-mgw. |
| |
| What we want to achieve in this example is the following configuration: |
| |
| .DSCP and PCP assignments for osmo-mgw Abis downlink traffic in this example |
| [options="header",width="30%",cols="2,1,1"] |
| |=== |
| |Traffic |DSCP|PCP |
| |RTP | 46| 6 |
| |=== |
| |
| . configure the osmo-mgw program to set the DSCP value |
| . configure an egrees QoS map to map from priority to PCP |
| |
| .Example Step 1: add related VTY configuration to `osmo-mgw.cfg` |
| ---- |
| ... |
| mgcp |
| rtp ip-dscp 46 |
| rtp socket-priority 6 |
| ... |
| ---- |
| |
| .Example Step 2: egress QoS map to map from socket priority to PCP values |
| ---- |
| $ sudo ip link set dev eth0.9<1> type vlan egress-qos-map 0:0 5:5 6:6 7:7 <2> |
| ---- |
| <1> make sure to specify your specific VLAN interface name here instead of `eth0.9`. |
| <2> create a egress QoS map that maps the priority value 1:1 to the PCP. We also include the |
| mapping 5:5 and 7:7 from the osmo-bsc example (see <<userman-osmobsc>>) here. |
| |
| NOTE:: The settings of the `ip` command are volatile and only active until |
| the next reboot (or the network device or VLAN is removed). Please refer to |
| the documentation of your specific Linux distribution in order to find out how |
| to make such settings persistent by means of an `ifup` hook whenever the interface |
| comes up. For CentOS/RHEL 8 this can e.g. be achieved by means of an `/sbin/ifup-local |
| script` (when using `network-scripts` and not NetworkManager). For Debian or Ubuntu, |
| this typically involves adding `up` lines to `/etc/network/interfaces` or a `/etc/network/if-up.d` |
| script. |