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| -rw-r--r-- | docs/qos.rst | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/docs/qos.rst b/docs/qos.rst index 447780f1..6826b83c 100644 --- a/docs/qos.rst +++ b/docs/qos.rst @@ -1083,9 +1083,9 @@ parameters. .. note:: If you configure a class for **VoIP traffic**, don't give it any - *ceiling*, otherwise new VoIP calls could start when there is available - bandwidth and get suddenly dropped when other classes start using - their bandwidth. + *ceiling*, otherwise new VoIP calls could start when the link is + available and get suddenly dropped when other classes start using + their assigned *bandwidth* share. Example @@ -1182,7 +1182,12 @@ That is how it is possible to do the so-called "ingress shaping". set interfaces input ifb0 traffic-policy out MY-INGRESS-SHAPING set interfaces ethernet eth0 redirect ifb0 +.. warning:: + Do not configure IFB as the first step. First create everything else + of your traffic-policy, and then you can configure IFB. + Otherwise you might get the ``RTNETLINK answer: File exists`` error, + which can be solved with ``sudo ip link delete ifb0``. .. _that can give you a great deal of flexibility: https://blog.vyos.io/using-the-policy-route-and-packet-marking-for-custom-qos-matches |