Note that specifying -b 0 disables bandwidth limits.

Documentation change only, no functional changes.

Fixes #170.

src/iperf3.1

@@ -98,6 +98,8 @@ You can also add a '/' and a number to the bandwidth specifier.
 This is called "burst mode".
 It will send the given number of packets without pausing, even if that
 temporarily exceeds the specified bandwidth limit.
+Setting the target bandwidth to 0 will disable bandwidth limits
+(particularly useful for UDP tests).
 .TP
 .BR -t ", " --time " \fIn\fR"
 time in seconds to transmit for (default 10 secs)

src/locale.c

@@ -100,7 +100,7 @@ const char usage_longstr[] = "Usage: iperf [-s|-c host] [options]\n"
                            "  --sctp                    use SCTP rather than TCP\n"
 #endif /* HAVE_SCTP */
                            "  -u, --udp                 use UDP rather than TCP\n"
-                           "  -b, --bandwidth #[KMG][/#] target bandwidth in bits/sec\n"
+                           "  -b, --bandwidth #[KMG][/#] target bandwidth in bits/sec (0 for unlimited)\n"
                            "                            (default %d Mbit/sec for UDP, unlimited for TCP)\n"
                            "                            (optional slash and packet count for burst mode)\n"
                            "  -t, --time      #         time in seconds to transmit for (default %d secs)\n"