documentation:examples:multicast_with_pim-sm
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documentation:examples:multicast_with_pim-sm [2019/11/08 10:57] – [4. Check VM3 correctly notice this mcast subscriber] olivier | documentation:examples:multicast_with_pim-sm [2019/11/08 19:22] (current) – [Checking NIC drivers and Bhyve compatibility with multicast] olivier | ||
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+ | ===== Checking NIC drivers and Bhyve compatibility with multicast ===== | ||
+ | |||
+ | Before to star with advanced routing setup, just start to test simple multicast between 2 relatives host: Some NIC (vtnet) or some hypervisors network setup aren't compliant with very simple multicast. | ||
+ | |||
+ | On VM1, start a mcast generator (client emitting mcast): | ||
+ | < | ||
+ | [root@VM1]~# | ||
+ | ------------------------------------------------------------ | ||
+ | Client connecting to 239.1.1.1, UDP port 5001 | ||
+ | Sending 1470 byte datagrams, IPG target: 11215.21 us (kalman adjust) | ||
+ | Setting multicast TTL to 32 | ||
+ | UDP buffer size: 9.00 KByte (default) | ||
+ | ------------------------------------------------------------ | ||
+ | [ 3] local 10.0.12.1 port 46636 connected with 239.1.1.1 port 5001 | ||
+ | [ ID] Interval | ||
+ | [ 3] 0.0- 1.0 sec 131 KBytes | ||
+ | [ 3] 1.0- 2.0 sec 128 KBytes | ||
+ | [ 3] 2.0- 3.0 sec 128 KBytes | ||
+ | [ 3] 0.0- 3.5 sec 446 KBytes | ||
+ | [ 3] Sent 311 datagrams | ||
+ | (...) | ||
+ | </ | ||
+ | |||
+ | On the direct connected VM2, start to check if in non-promiscious mode it sees mcast packets comming: | ||
+ | < | ||
+ | [root@VM2]~# | ||
+ | tcpdump: verbose output suppressed, use -v or -vv for full protocol decode | ||
+ | listening on em0, link-type EN10MB (Ethernet), capture size 262144 bytes | ||
+ | 15: | ||
+ | 15: | ||
+ | 2 packets captured | ||
+ | 2 packets received by filter | ||
+ | 0 packets dropped by kernel | ||
+ | </ | ||
+ | |||
+ | => 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 | ||
+ | |||
+ | < | ||
+ | [root@VM2]~# | ||
+ | ------------------------------------------------------------ | ||
+ | Server listening on UDP port 5001 | ||
+ | Binding to local address 239.1.1.1 | ||
+ | Joining multicast group 239.1.1.1 | ||
+ | Receiving 1470 byte datagrams | ||
+ | UDP buffer size: 41.1 KByte (default) | ||
+ | ------------------------------------------------------------ | ||
+ | [ 3] local 239.1.1.1 port 5001 connected with 192.168.100.149 port 35181 | ||
+ | [ ID] Interval | ||
+ | [ 3] 0.0- 1.0 sec 129 KBytes | ||
+ | [ 3] 1.0- 2.0 sec 128 KBytes | ||
+ | [ 3] 2.0- 3.0 sec 128 KBytes | ||
+ | [ 3] 3.0- 4.0 sec 128 KBytes | ||
+ | [ 3] 4.0- 5.0 sec 128 KBytes | ||
+ | [ 3] 5.0- 6.0 sec 129 KBytes | ||
+ | [ 3] 6.0- 7.0 sec 128 KBytes | ||
+ | (...) | ||
+ | </ | ||
+ | => Notice the mcast receiver is correctly receiving at 1Mb/s. | ||
+ | |||
+ | Here is a non working example (here because source interface not given, and it uses the other one): | ||
+ | < | ||
+ | [root@VM2]~# | ||
+ | ------------------------------------------------------------ | ||
+ | Server listening on UDP port 5001 | ||
+ | Binding to local address 239.1.1.1 | ||
+ | Joining multicast group 239.1.1.1 | ||
+ | Receiving 1470 byte datagrams | ||
+ | UDP buffer size: 41.1 KByte (default) | ||
+ | ------------------------------------------------------------ | ||
+ | (...) | ||
+ | </ | ||
+ | |||
+ | => Here it doesn' | ||
===== Checking pimd behavior ===== | ===== Checking pimd behavior ===== | ||
documentation/examples/multicast_with_pim-sm.1573207071.txt.gz · Last modified: 2019/11/08 10:57 by olivier