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January 23, 2016 02:00
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MTU experiments with Linux bridge - capture of typical ping
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| # ping -c 1 10.100.52.104 | |
| PING 10.100.52.104 (10.100.52.104) 56(84) bytes of data. | |
| 64 bytes from 10.100.52.104: icmp_seq=1 ttl=63 time=0.778 ms | |
| --- 10.100.52.104 ping statistics --- | |
| 1 packets transmitted, 1 received, 0% packet loss, time 0ms | |
| rtt min/avg/max/mdev = 0.778/0.778/0.778/0.000 ms | |
| Neutron public network router interface (gateway): | |
| 00:58:22.278627 00:1a:64:f1:e8:39 > fa:16:3e:2b:c1:fd, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 11212, offset 0, flags [DF], proto ICMP (1), length 84) | |
| 10.100.52.45 > 10.100.52.104: ICMP echo request, id 3685, seq 1, length 64 | |
| 00:58:22.279267 fa:16:3e:2b:c1:fd > 00:1a:64:f1:e8:39, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 63, id 560, offset 0, flags [none], proto ICMP (1), length 84) | |
| 10.100.52.104 > 10.100.52.45: ICMP echo reply, id 3685, seq 1, length 64 | |
| Neutron private network router interface, namespace end of veth pair: | |
| 00:58:22.278664 fa:16:3e:e5:43:1c > fa:16:3e:46:ac:d3, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 63, id 11212, offset 0, flags [DF], proto ICMP (1), length 84) | |
| 10.100.52.45 > 172.16.1.3: ICMP echo request, id 3685, seq 1, length 64 | |
| 00:58:22.279250 fa:16:3e:46:ac:d3 > fa:16:3e:e5:43:1c, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 560, offset 0, flags [none], proto ICMP (1), length 84) | |
| 172.16.1.3 > 10.100.52.45: ICMP echo reply, id 3685, seq 1, length 64 | |
| Neutron private network router interface, bridge end of veth pair: | |
| 00:58:22.278669 fa:16:3e:e5:43:1c > fa:16:3e:46:ac:d3, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 63, id 11212, offset 0, flags [DF], proto ICMP (1), length 84) | |
| 10.100.52.45 > 172.16.1.3: ICMP echo request, id 3685, seq 1, length 64 | |
| 00:58:22.279245 fa:16:3e:46:ac:d3 > fa:16:3e:e5:43:1c, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 560, offset 0, flags [none], proto ICMP (1), length 84) | |
| 172.16.1.3 > 10.100.52.45: ICMP echo reply, id 3685, seq 1, length 64 | |
| Neutron private network VXLAN underlying interface, controller node end of overlay: | |
| 00:58:22.278707 00:1a:64:f1:e5:74 > 00:1a:64:f1:df:74, ethertype IPv4 (0x0800), length 148: (tos 0x0, ttl 64, id 44137, offset 0, flags [none], proto UDP (17), length 134) | |
| 9.30.183.46.46263 > 9.30.183.47.8472: OTV, flags [I] (0x08), overlay 0, instance 157 | |
| fa:16:3e:e5:43:1c > fa:16:3e:46:ac:d3, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 63, id 11212, offset 0, flags [DF], proto ICMP (1), length 84) | |
| 10.100.52.45 > 172.16.1.3: ICMP echo request, id 3685, seq 1, length 64 | |
| 00:58:22.279200 00:1a:64:f1:df:74 > 00:1a:64:f1:e5:74, ethertype IPv4 (0x0800), length 148: (tos 0x0, ttl 64, id 33701, offset 0, flags [none], proto UDP (17), length 134) | |
| 9.30.183.47.46204 > 9.30.183.46.8472: OTV, flags [I] (0x08), overlay 0, instance 157 | |
| fa:16:3e:46:ac:d3 > fa:16:3e:e5:43:1c, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 560, offset 0, flags [none], proto ICMP (1), length 84) | |
| 172.16.1.3 > 10.100.52.45: ICMP echo reply, id 3685, seq 1, length 64 | |
| Neutron private network VXLAN underlying interface, compute node end of overlay: | |
| 00:58:22.278135 00:1a:64:f1:e5:74 > 00:1a:64:f1:df:74, ethertype IPv4 (0x0800), length 148: (tos 0x0, ttl 64, id 44137, offset 0, flags [none], proto UDP (17), length 134) | |
| 9.30.183.46.46263 > 9.30.183.47.8472: OTV, flags [I] (0x08), overlay 0, instance 157 | |
| fa:16:3e:e5:43:1c > fa:16:3e:46:ac:d3, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 63, id 11212, offset 0, flags [DF], proto ICMP (1), length 84) | |
| 10.100.52.45 > 172.16.1.3: ICMP echo request, id 3685, seq 1, length 64 | |
| 00:58:22.278464 00:1a:64:f1:df:74 > 00:1a:64:f1:e5:74, ethertype IPv4 (0x0800), length 148: (tos 0x0, ttl 64, id 33701, offset 0, flags [none], proto UDP (17), length 134) | |
| 9.30.183.47.46204 > 9.30.183.46.8472: OTV, flags [I] (0x08), overlay 0, instance 157 | |
| fa:16:3e:46:ac:d3 > fa:16:3e:e5:43:1c, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 560, offset 0, flags [none], proto ICMP (1), length 84) | |
| 172.16.1.3 > 10.100.52.45: ICMP echo reply, id 3685, seq 1, length 64 | |
| VM, bridge end of tap interface: | |
| 00:58:22.278184 fa:16:3e:e5:43:1c > fa:16:3e:46:ac:d3, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 63, id 11212, offset 0, flags [DF], proto ICMP (1), length 84) | |
| 10.100.52.45 > 172.16.1.3: ICMP echo request, id 3685, seq 1, length 64 | |
| 00:58:22.278419 fa:16:3e:46:ac:d3 > fa:16:3e:e5:43:1c, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 560, offset 0, flags [none], proto ICMP (1), length 84) | |
| 172.16.1.3 > 10.100.52.45: ICMP echo reply, id 3685, seq 1, length 64 |
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