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From 9d1e99695d9c39432a66ec20f36928bf053410a4 Mon Sep 17 00:00:00 2001
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From: Phil Sutter <psutter@redhat.com>
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Date: Mon, 7 Mar 2016 20:45:51 +0100
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Subject: [PATCH] TBF man page fix (tbf is not classless)
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Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1251186
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Upstream Status: iproute2.git commit 7bc7fcaadbd2d
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commit 7bc7fcaadbd2db1aef1f9b15216a97f63d826493
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Author: Sergey V. Lobanov <sergey@lobanov.in>
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Date: Fri May 9 22:12:54 2014 +0400
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TBF man page fix (tbf is not classless)
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TBF is not classless qdisc. man page corrected, added example
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describing the use of inner qdisc
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Signed-off-by: Sergey V. Lobanov <sergey@lobanov.in>
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---
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man/man8/tc-tbf.8 | 12 ++++++++++--
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1 file changed, 10 insertions(+), 2 deletions(-)
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diff --git a/man/man8/tc-tbf.8 b/man/man8/tc-tbf.8
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index 51310f1..fc2c837 100644
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--- a/man/man8/tc-tbf.8
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+++ b/man/man8/tc-tbf.8
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@@ -21,7 +21,7 @@ bytes/cell
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burst is also known as buffer and maxburst. mtu is also known as minburst.
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.SH DESCRIPTION
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-The Token Bucket Filter is a classless queueing discipline available for
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+The Token Bucket Filter is a classful queueing discipline available for
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traffic control with the
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.BR tc (8)
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command.
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@@ -121,9 +121,17 @@ To attach a TBF with a sustained maximum rate of 0.5mbit/s, a peakrate of 1.0mbi
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a 5kilobyte buffer, with a pre-bucket queue size limit calculated so the TBF causes
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at most 70ms of latency, with perfect peakrate behaviour, issue:
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.P
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-# tc qdisc add dev eth0 root tbf rate 0.5mbit \\
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+# tc qdisc add dev eth0 handle 10: root tbf rate 0.5mbit \\
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burst 5kb latency 70ms peakrate 1mbit \\
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minburst 1540
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+.P
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+To attach an inner qdisc, for example sfq, issue:
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+.P
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+# tc qdisc add dev eth0 parent 10:1 handle 100: sfq
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+.P
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+Without inner qdisc TBF queue acts as bfifo. If the inner qdisc is changed
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+the limit/latency is not effective anymore.
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+.P
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.SH SEE ALSO
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.BR tc (8)
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--
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1.8.3.1
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