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lifeboy
Nov 14th, 2017
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  1. $ ip addr show
  2. 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
  3.     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
  4.     inet 127.0.0.1/8 scope host lo
  5.        valid_lft forever preferred_lft forever
  6.     inet6 ::1/128 scope host
  7.        valid_lft forever preferred_lft forever
  8. 2: enp2s0f2: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000
  9.     link/ether 60:45:cb:b3:a0:be brd ff:ff:ff:ff:ff:ff
  10. 3: wlp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
  11.     link/ether 3c:a0:67:15:d9:13 brd ff:ff:ff:ff:ff:ff
  12.     inet 192.168.1.109/24 brd 192.168.1.255 scope global dynamic wlp3s0
  13.        valid_lft 42669sec preferred_lft 42669sec
  14.     inet6 fe80::3b02:613c:971e:feba/64 scope link
  15.        valid_lft forever preferred_lft forever
  16. 4: virbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
  17.     link/ether 52:54:00:1c:12:1b brd ff:ff:ff:ff:ff:ff
  18.     inet 192.168.100.1/24 brd 192.168.100.255 scope global virbr0
  19.        valid_lft forever preferred_lft forever
  20. 5: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN group default qlen 1000
  21.     link/ether 52:54:00:1c:12:1b brd ff:ff:ff:ff:ff:ff
  22. 6: vnet0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master virbr0 state UNKNOWN group default qlen 1000
  23.     link/ether fe:54:00:a0:2e:44 brd ff:ff:ff:ff:ff:ff
  24.     inet6 fe80::fc54:ff:fea0:2e44/64 scope link
  25.        valid_lft forever preferred_lft forever
  26.  
  27. $ ip route
  28. default via 192.168.1.1 dev wlp3s0 proto static metric 600
  29. 169.254.0.0/16 dev wlp3s0 scope link metric 1000
  30. 192.168.1.0/24 dev wlp3s0 proto kernel scope link src 192.168.1.109 metric 600
  31. 192.168.100.0/24 dev virbr0 proto kernel scope link src 192.168.100.1
  32.  
  33. $ brctl show
  34. bridge name bridge id       STP enabled interfaces
  35. virbr0      8000.5254001c121b   yes     virbr0-nic
  36.                             vnet0
  37. I sent 3 pings from the VM Guest and they all timed out while running tcpdump below on the host.
  38.  
  39. $ sudo tcpdump -ni vnet0
  40. tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
  41. listening on vnet0, link-type EN10MB (Ethernet), capture size 262144 bytes
  42. 19:00:41.302206 STP 802.1d, Config, Flags [none], bridge-id 8000.52:54:00:1c:12:1b.8002, length 35
  43. 19:00:42.514663 ARP, Request who-has 192.168.100.1 tell 192.168.100.20, length 28
  44. 19:00:42.514680 ARP, Reply 192.168.100.1 is-at 52:54:00:1c:12:1b, length 28
  45. 19:00:43.318208 STP 802.1d, Config, Flags [none], bridge-id 8000.52:54:00:1c:12:1b.8002, length 35
  46. 19:00:44.478035 ARP, Request who-has 192.168.100.1 tell 192.168.100.20, length 28
  47. 19:00:44.478053 ARP, Reply 192.168.100.1 is-at 52:54:00:1c:12:1b, length 28
  48. 19:00:45.302206 STP 802.1d, Config, Flags [none], bridge-id 8000.52:54:00:1c:12:1b.8002, length 35
  49. 19:00:45.478904 ARP, Request who-has 192.168.100.1 tell 192.168.100.20, length 28
  50. 19:00:45.478921 ARP, Reply 192.168.100.1 is-at 52:54:00:1c:12:1b, length 28
  51. 19:00:46.480369 ARP, Request who-has 192.168.100.1 tell 192.168.100.20, length 28
  52. 19:00:46.480386 ARP, Reply 192.168.100.1 is-at 52:54:00:1c:12:1b, length 28
  53. 19:00:47.318206 STP 802.1d, Config, Flags [none], bridge-id 8000.52:54:00:1c:12:1b.8002, length 35
  54. 19:00:47.602243 ARP, Request who-has 192.168.100.1 tell 192.168.100.20, length 28
  55. 19:00:47.602272 ARP, Reply 192.168.100.1 is-at 52:54:00:1c:12:1b, length 28
  56. 19:00:49.194284 ARP, Request who-has 192.168.100.1 tell 192.168.100.20, length 28
  57. 19:00:49.194302 ARP, Reply 192.168.100.1 is-at 52:54:00:1c:12:1b, length 28
  58. 19:00:49.302207 STP 802.1d, Config, Flags [none], bridge-id 8000.52:54:00:1c:12:1b.8002, length 35
  59. 19:00:49.514817 IP 192.168.100.20.137 > 192.168.100.255.137: NBT UDP PACKET(137): QUERY; REQUEST; BROADCAST
  60. 19:00:50.195626 ARP, Request who-has 192.168.100.1 tell 192.168.100.20, length 28
  61. 19:00:50.195645 ARP, Reply 192.168.100.1 is-at 52:54:00:1c:12:1b, length 28
  62. 19:00:50.265787 IP 192.168.100.20.137 > 192.168.100.255.137: NBT UDP PACKET(137): QUERY; REQUEST; BROADCAST
  63. 19:00:51.016963 IP 192.168.100.20.137 > 192.168.100.255.137: NBT UDP PACKET(137): QUERY; REQUEST; BROADCAST
  64. 19:00:51.318208 STP 802.1d, Config, Flags [none], bridge-id 8000.52:54:00:1c:12:1b.8002, length 35
  65. 19:00:51.407513 ARP, Request who-has 192.168.100.1 tell 192.168.100.20, length 28
  66. 19:00:51.407531 ARP, Reply 192.168.100.1 is-at 52:54:00:1c:12:1b, length 28
  67. 19:00:52.488988 ARP, Request who-has 192.168.100.1 tell 192.168.100.20, length 28
  68. 19:00:52.489006 ARP, Reply 192.168.100.1 is-at 52:54:00:1c:12:1b, length 28
  69. 19:00:53.302206 STP 802.1d, Config, Flags [none], bridge-id 8000.52:54:00:1c:12:1b.8002, length 35
  70. 19:00:53.630647 ARP, Request who-has 192.168.100.1 tell 192.168.100.20, length 28
  71. 19:00:53.630667 ARP, Reply 192.168.100.1 is-at 52:54:00:1c:12:1b, length 28
  72. 19:00:54.221539 IP 192.168.100.20.1091 > 192.168.100.255.5353: 0 [2q] SRV (QM)? _host-config._udp.local. SRV (QM)? _network-scan._tcp.local. (71)
  73. 19:00:54.632077 ARP, Request who-has 192.168.100.1 tell 192.168.100.20, length 28
  74. 19:00:54.632094 ARP, Reply 192.168.100.1 is-at 52:54:00:1c:12:1b, length 28
  75. 19:00:55.318206 STP 802.1d, Config, Flags [none], bridge-id 8000.52:54:00:1c:12:1b.8002, length 35
  76. 19:00:56.204338 ARP, Request who-has 192.168.100.1 tell 192.168.100.20, length 28
  77. 19:00:56.204356 ARP, Reply 192.168.100.1 is-at 52:54:00:1c:12:1b, length 28
  78. 19:00:57.302207 STP 802.1d, Config, Flags [none], bridge-id 8000.52:54:00:1c:12:1b.8002, length 35
  79. 19:00:57.346203 ARP, Request who-has 192.168.100.1 tell 192.168.100.20, length 28
  80. 19:00:57.346224 ARP, Reply 192.168.100.1 is-at 52:54:00:1c:12:1b, length 28
  81. 19:00:59.318206 STP 802.1d, Config, Flags [none], bridge-id 8000.52:54:00:1c:12:1b.8002, length 35
  82. 19:00:59.509087 IP 192.168.100.20.137 > 192.168.100.255.137: NBT UDP PACKET(137): QUERY; REQUEST; BROADCAST
  83. 19:01:00.260135 IP 192.168.100.20.137 > 192.168.100.255.137: NBT UDP PACKET(137): QUERY; REQUEST; BROADCAST
  84. 19:01:00.640709 ARP, Request who-has 192.168.100.1 tell 192.168.100.20, length 28
  85. 19:01:00.640729 ARP, Reply 192.168.100.1 is-at 52:54:00:1c:12:1b, length 28
  86. 19:01:01.011212 IP 192.168.100.20.137 > 192.168.100.255.137: NBT UDP PACKET(137): QUERY; REQUEST; BROADCAST
  87. 19:01:01.302206 STP 802.1d, Config, Flags [none], bridge-id 8000.52:54:00:1c:12:1b.8002, length 35
  88. 19:01:03.318346 STP 802.1d, Config, Flags [none], bridge-id 8000.52:54:00:1c:12:1b.8002, length 35
  89. 19:01:04.519422 ARP, Request who-has 192.168.100.1 tell 192.168.100.20, length 28
  90. 19:01:04.519465 ARP, Reply 192.168.100.1 is-at 52:54:00:1c:12:1b, length 28
  91. 19:01:04.891057 IP 192.168.100.1.17500 > 192.168.100.255.17500: UDP, length 431
  92. 19:01:05.302365 STP 802.1d, Config, Flags [none], bridge-id 8000.52:54:00:1c:12:1b.8002, length 35
  93. 19:01:05.517857 ARP, Request who-has 192.168.100.1 tell 192.168.100.20, length 28
  94. 19:01:05.517905 ARP, Reply 192.168.100.1 is-at 52:54:00:1c:12:1b, length 28
  95. 19:01:05.518528 IP 192.168.100.20.1096 > 192.168.100.255.5353: 0 [2q] SRV (QM)? _host-config._udp.local. SRV (QM)? _network-scan._tcp.local. (71)
  96. 19:01:06.519462 ARP, Request who-has 192.168.100.1 tell 192.168.100.20, length 28
  97. 19:01:06.519516 ARP, Reply 192.168.100.1 is-at 52:54:00:1c:12:1b, length 28
  98. 19:01:07.318353 STP 802.1d, Config, Flags [none], bridge-id 8000.52:54:00:1c:12:1b.8002, length 35
  99. 19:01:09.302383 STP 802.1d, Config, Flags [none], bridge-id 8000.52:54:00:1c:12:1b.8002, length 35
  100. 19:01:09.954725 ARP, Request who-has 192.168.100.1 tell 192.168.100.20, length 28
  101. 19:01:09.954784 ARP, Reply 192.168.100.1 is-at 52:54:00:1c:12:1b, length 28
  102. 19:01:11.318386 STP 802.1d, Config, Flags [none], bridge-id 8000.52:54:00:1c:12:1b.8002, length 35
  103. 19:01:12.441683 ARP, Request who-has 192.168.100.1 tell 192.168.100.20, length 28
  104. 19:01:12.441755 ARP, Reply 192.168.100.1 is-at 52:54:00:1c:12:1b, length 28
  105. 19:01:12.481109 IP 192.168.100.1.10569 > 239.255.255.250.1900: UDP, length 173
  106. 19:01:12.481167 IP 192.168.100.1.10569 > 239.255.255.250.1900: UDP, length 173
  107. 19:01:13.302395 STP 802.1d, Config, Flags [none], bridge-id 8000.52:54:00:1c:12:1b.8002, length 35
  108. 19:01:13.439606 ARP, Request who-has 192.168.100.1 tell 192.168.100.20, length 28
  109. 19:01:13.439673 ARP, Reply 192.168.100.1 is-at 52:54:00:1c:12:1b, length 28
  110. ^C
  111. 68 packets captured
  112. 68 packets received by filter
  113. 0 packets dropped by kernel
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