[pim] Hint for test_igmpv3_join command-line utility
diff --git a/pimd/DEBUG b/pimd/DEBUG
index aeed9da..119c46f 100644
--- a/pimd/DEBUG
+++ b/pimd/DEBUG
@@ -8,6 +8,18 @@
- Check the multicast packets are not being dropped due to
fragmentation problems.
+ - Two easy options to test IGMPv3 joins from the receiver host:
+
+ 1) Configure pimd on the receiver host with "ip igmp join":
+
+ interface eth0
+ ip pim ssm
+ ip igmp join 239.1.1.1 1.1.1.1
+
+ 2) Use the test_igmpv3_join command-line utility:
+
+ test_igmpv3_join eth0 239.1.1.1 1.1.1.1
+
- The following command generates a 100-kbps multicast stream for
channel 1.1.1.1,239.1.1.1 with TTL 10 and 1000-byte payload per UDP
packet (to avoid fragmentation):