Explain TC class id limits

d89fbf32 · Stephen Hemminger · da7fbb24 · d89fbf32
Commit d89fbf32 authored Aug 20, 2012 by Stephen Hemminger
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man/man8/tc.8 man/man8/tc.8 +6 -3

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--- a/man/man8/tc.8
+++ b/man/man8/tc.8
@@ -233,7 +233,10 @@ attached to that class. Check qdisc specific manpages for details, however.
 All qdiscs, classes and filters have IDs, which can either be specified
 or be automatically assigned.

-IDs consist of a major number and a minor number, separated by a colon.
+ID's consist of a major number and a minor number, separated by a colon.
+Both major and minor number are limited to 16 bits. There are two special
+values: root is signified by major and minor of all ones, and unspecified
+is all zeros.

 .TP
 QDISCS