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author | Harald Welte <laforge@osmocom.org> | 2021-04-30 17:59:23 +0200 |
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committer | laforge <laforge@osmocom.org> | 2021-05-01 17:36:09 +0000 |
commit | 858401b04e0ce665e0ab797e61f4c71bffb82bb1 (patch) | |
tree | 6e5ec3b43914c3ccf12cc3901b9d51613ad4a26b /doc/manuals/chapters | |
parent | 552b4f3c0cf790d49fd73dda85f12e2888b8bf8a (diff) |
manual: Include QoS chapter and add osmo-bsc specific example
Change-Id: I3b1d44fc545725172142b903190a3ff5094805dd
Requires: osmo-gsm-manuals.git Id344c29eda2a9b3e36376302b425e9db1f6c0f28
Requires: libosmo-abis.git I8991dd6eb406a5b9a70498974fc1ad339452f871
Diffstat (limited to 'doc/manuals/chapters')
-rw-r--r-- | doc/manuals/chapters/qos-example.adoc | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/doc/manuals/chapters/qos-example.adoc b/doc/manuals/chapters/qos-example.adoc new file mode 100644 index 000000000..2f88b935c --- /dev/null +++ b/doc/manuals/chapters/qos-example.adoc @@ -0,0 +1,46 @@ +==== Full example of QoS for osmo-bsc downlink QoS + +In the below example we will show the full set of configuration required +for both DSCP and PCP differentiation of downlink Abis traffic by osmo-bsc. + +What we want to achieve in this example is the following configuration: + +.DSCP and PCP assignments for osmo-bsc downlink traffic in this example +[options="header",width="30%",cols="2,1,1"] +|=== +|Traffic |DSCP|PCP +|A-bis RSL | 56| 7 +|A-bis RTP | 46| 6 +|A-bis OML | 34| 5 +|=== + +. configure the osmocom 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-bsc.cfg` +---- +... +e1_input + ipa ip-dscp oml 34 + ipa socket-priority oml 5 + ipa ip-dscp rsl 56 + ipa socket-priority rsl 7 +... +---- + +.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 6:6 from the osmo-mgw example (see <<userman-osmomgw>>) 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. |