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Created January 18, 2016 02:41
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MTU experiments - capture of ping with 1373 payload and DF=0
Raw
gistfile1.txt
# ping -c 1 -s 1373 -M dont 10.4.31.102
PING 10.4.31.102 (10.4.31.102) 1373(1401) bytes of data.
1381 bytes from 10.4.31.102: icmp_seq=1 ttl=63 time=4.29 ms
--- 10.4.31.102 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 4.293/4.293/4.293/0.000 ms
Neutron public network router interface (gateway):
20:43:41.662081 7e:27:12:8e:ab:89 > fa:16:3e:1b:0d:d3, ethertype IPv4 (0x0800), length 1415: (tos 0x0, ttl 64, id 175, offset 0, flags [none], proto ICMP (1), length 1401)
10.4.31.1 > 10.4.31.102: ICMP echo request, id 8018, seq 1, length 1381
20:43:41.665474 fa:16:3e:1b:0d:d3 > 7e:27:12:8e:ab:89, ethertype IPv4 (0x0800), length 1415: (tos 0x0, ttl 63, id 33160, offset 0, flags [none], proto ICMP (1), length 1401)
10.4.31.102 > 10.4.31.1: ICMP echo reply, id 8018, seq 1, length 1381
Neutron private network router interface, namespace end of veth pair:
20:43:41.662121 fa:16:3e:1d:d1:a3 > fa:16:3e:bd:bf:3f, ethertype IPv4 (0x0800), length 1415: (tos 0x0, ttl 63, id 175, offset 0, flags [none], proto ICMP (1), length 1401)
10.4.31.1 > 172.16.1.3: ICMP echo request, id 8018, seq 1, length 1381
20:43:41.665447 fa:16:3e:bd:bf:3f > fa:16:3e:1d:d1:a3, ethertype IPv4 (0x0800), length 1410: (tos 0x0, ttl 64, id 33160, offset 0, flags [+], proto ICMP (1), length 1396)
172.16.1.3 > 10.4.31.1: ICMP echo reply, id 8018, seq 1, length 1376
20:43:41.665450 fa:16:3e:bd:bf:3f > fa:16:3e:1d:d1:a3, ethertype IPv4 (0x0800), length 39: (tos 0x0, ttl 64, id 33160, offset 1376, flags [none], proto ICMP (1), length 25)
172.16.1.3 > 10.4.31.1: ip-proto-1
Neutron private network router interface, bridge end of veth pair:
20:43:41.662130 fa:16:3e:1d:d1:a3 > fa:16:3e:bd:bf:3f, ethertype IPv4 (0x0800), length 1415: (tos 0x0, ttl 63, id 175, offset 0, flags [none], proto ICMP (1), length 1401)
10.4.31.1 > 172.16.1.3: ICMP echo request, id 8018, seq 1, length 1381
20:43:41.665439 fa:16:3e:bd:bf:3f > fa:16:3e:1d:d1:a3, ethertype IPv4 (0x0800), length 1410: (tos 0x0, ttl 64, id 33160, offset 0, flags [+], proto ICMP (1), length 1396)
172.16.1.3 > 10.4.31.1: ICMP echo reply, id 8018, seq 1, length 1376
20:43:41.665449 fa:16:3e:bd:bf:3f > fa:16:3e:1d:d1:a3, ethertype IPv4 (0x0800), length 39: (tos 0x0, ttl 64, id 33160, offset 1376, flags [none], proto ICMP (1), length 25)
172.16.1.3 > 10.4.31.1: ip-proto-1
Neutron private network VXLAN interface, controller node end of overlay:
20:43:41.662139 fa:16:3e:1d:d1:a3 > fa:16:3e:bd:bf:3f, ethertype IPv4 (0x0800), length 1410: (tos 0x0, ttl 63, id 175, offset 0, flags [+], proto ICMP (1), length 1396)
10.4.31.1 > 172.16.1.3: ICMP echo request, id 8018, seq 1, length 1376
20:43:41.662188 fa:16:3e:1d:d1:a3 > fa:16:3e:bd:bf:3f, ethertype IPv4 (0x0800), length 39: (tos 0x0, ttl 63, id 175, offset 1376, flags [none], proto ICMP (1), length 25)
10.4.31.1 > 172.16.1.3: ip-proto-1
20:43:41.662987 fa:16:3e:bd:bf:3f > fa:16:3e:1d:d1:a3, ethertype IPv4 (0x0800), length 1410: (tos 0x0, ttl 64, id 33160, offset 0, flags [+], proto ICMP (1), length 1396)
172.16.1.3 > 10.4.31.1: ICMP echo reply, id 8018, seq 1, length 1376
20:43:41.663023 fa:16:3e:bd:bf:3f > fa:16:3e:1d:d1:a3, ethertype IPv4 (0x0800), length 39: (tos 0x0, ttl 64, id 33160, offset 1376, flags [none], proto ICMP (1), length 25)
172.16.1.3 > 10.4.31.1: ip-proto-1
Neutron private network VXLAN interface, compute node end of overlay:
20:43:41.662139 fa:16:3e:1d:d1:a3 (oui Unknown) > fa:16:3e:bd:bf:3f (oui Unknown), ethertype IPv4 (0x0800), length 1410: (tos 0x0, ttl 63, id 175, offset 0, flags [+], proto ICMP (1), length 1396)
10.4.31.1 > 172.16.1.3: ICMP echo request, id 8018, seq 1, length 1376
20:43:41.662188 fa:16:3e:1d:d1:a3 (oui Unknown) > fa:16:3e:bd:bf:3f (oui Unknown), ethertype IPv4 (0x0800), length 39: (tos 0x0, ttl 63, id 175, offset 1376, flags [none], proto ICMP (1), length 25)
10.4.31.1 > 172.16.1.3: icmp
20:43:41.662987 fa:16:3e:bd:bf:3f (oui Unknown) > fa:16:3e:1d:d1:a3 (oui Unknown), ethertype IPv4 (0x0800), length 1410: (tos 0x0, ttl 64, id 33160, offset 0, flags [+], proto ICMP (1), length 1396)
172.16.1.3 > 10.4.31.1: ICMP echo reply, id 8018, seq 1, length 1376
20:43:41.663023 fa:16:3e:bd:bf:3f (oui Unknown) > fa:16:3e:1d:d1:a3 (oui Unknown), ethertype IPv4 (0x0800), length 39: (tos 0x0, ttl 64, id 33160, offset 1376, flags [none], proto ICMP (1), length 25)
172.16.1.3 > 10.4.31.1: icmp
VM, bridge end of tap interface:
0:43:41.662258 fa:16:3e:1d:d1:a3 > fa:16:3e:bd:bf:3f, ethertype IPv4 (0x0800), length 1410: (tos 0x0, ttl 63, id 175, offset 0, flags [+], proto ICMP (1), length 1396)
10.4.31.1 > 172.16.1.3: ICMP echo request, id 8018, seq 1, length 1376
20:43:41.662266 fa:16:3e:1d:d1:a3 > fa:16:3e:bd:bf:3f, ethertype IPv4 (0x0800), length 39: (tos 0x0, ttl 63, id 175, offset 1376, flags [none], proto ICMP (1), length 25)
10.4.31.1 > 172.16.1.3: ip-proto-1
20:43:41.662963 fa:16:3e:bd:bf:3f > fa:16:3e:1d:d1:a3, ethertype IPv4 (0x0800), length 1415: (tos 0x0, ttl 64, id 33160, offset 0, flags [none], proto ICMP (1), length 1401)
172.16.1.3 > 10.4.31.1: ICMP echo reply, id 8018, seq 1, length 1381
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