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--- documentation:examples:multicast_with_pim-sm [2019/11/08 15:18] – [Checking pimd behavior] olivier
+++ documentation:examples:multicast_with_pim-sm [2019/11/08 19:22] (current) – [Checking NIC drivers and Bhyve compatibility with multicast] olivier
@@ Line 153: / Line 153: @@
 </code>
-On the direct connected VM2, start a mcast listener (server receiving), it should receive multicast flow
+On the direct connected VM2, start to check if in non-promiscious mode it sees mcast packets comming:
+<code>
+[root@VM2]~# tcpdump -pni em0 -c 2
+tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
+listening on em0, link-type EN10MB (Ethernet), capture size 262144 bytes
+:22:32.517270 IP 10.0.12.1.33482 > 239.1.1.1.5001: UDP, length 1470
+:22:32.528668 IP 10.0.12.1.33482 > 239.1.1.1.5001: UDP, length 1470
+packets captured
+packets received by filter
+packets dropped by kernel
+</code>
+=> VM2 is receiving mcast packets from 10.0.12.1 to mcast group 239.1.1.1.
+Now on VM2 start a mcast listener (server receiving), it should receive multicast flow
 <code>
-[root@VM2]~# iperf -s -u -B 239.1.1.1 -i 1
+[root@VM2]~# iperf -s -u -B 239.1.1.1%em0 -i 1
 ------------------------------------------------------------
 Server listening on UDP port 5001
@@ Line 177: / Line 190: @@
 => Notice the mcast receiver is correctly receiving at 1Mb/s.
-Here is a non working example:
+Here is a non working example (here because source interface not given, and it uses the other one):
 <code>
 [root@VM2]~# iperf -s -u -B 239.1.1.1 -i 1
@@ Line 187: / Line 200: @@
 UDP buffer size: 41.1 KByte (default)
 ------------------------------------------------------------
+(...)
 </code>
+=> Here it doesn't receive traffic and stay in "waiting" mode forever.
 ===== Checking pimd behavior =====