47 lines
1.8 KiB
Plaintext
47 lines
1.8 KiB
Plaintext
==== Full example of QoS for osmo-bsc downlink QoS
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In the below example we will show the full set of configuration required
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for both DSCP and PCP differentiation of downlink Abis traffic by osmo-bsc.
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What we want to achieve in this example is the following configuration:
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.DSCP and PCP assignments for osmo-bsc downlink traffic in this example
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[options="header",width="30%",cols="2,1,1"]
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|===
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|Traffic |DSCP|PCP
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|A-bis RSL | 56| 7
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|A-bis RTP | 46| 6
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|A-bis OML | 34| 5
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|===
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. configure the osmocom program to set the DSCP value
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. configure an egrees QoS map to map from priority to PCP
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.Example Step 1: add related VTY configuration to `osmo-bsc.cfg`
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----
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...
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e1_input
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ipa ip-dscp oml 34
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ipa socket-priority oml 5
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ipa ip-dscp rsl 56
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ipa socket-priority rsl 7
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...
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----
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.Example Step 2: egress QoS map to map from socket priority to PCP values
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----
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$ sudo ip link set dev eth0.9<1> type vlan egress-qos-map 0:0 5:5 6:6 7:7 <2>
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----
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<1> make sure to specify your specific VLAN interface name here instead of `eth0.9`.
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<2> create a egress QoS map that maps the priority value 1:1 to the PCP. We also include the
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mapping 6:6 from the osmo-mgw example (see <<userman-osmomgw>>) here.
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NOTE:: The settings of the `ip` command are volatile and only active until
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the next reboot (or the network device or VLAN is removed). Please refer to
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the documentation of your specific Linux distribution in order to find out how
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to make such settings persistent by means of an `ifup` hook whenever the interface
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comes up. For CentOS/RHEL 8 this can e.g. be achieved by means of an `/sbin/ifup-local
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script` (when using `network-scripts` and not NetworkManager). For Debian or Ubuntu,
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this typically involves adding `up` lines to `/etc/network/interfaces` or a `/etc/network/if-up.d`
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script.
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