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tcpdump

Oct 19th, 2015
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  1. Packet tracing:
  2. Compute node : tcpdump on br-int
  3.  
  4. [root@newcompute1 ~]# tcpdump -i br-int
  5. tcpdump: WARNING: br-int: no IPv4 address assigned
  6. tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
  7. listening on br-int, link-type EN10MB (Ethernet), capture size 65535 bytes
  8. 15:43:41.002482 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from e6:f8:6a:82:b0:61 (oui Unknown), length 300
  9. 15:43:45.003433 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from e6:f8:6a:82:b0:61 (oui Unknown), length 300
  10.  
  11. Compute node : tcpdump on br-tun
  12.  
  13. [root@newcompute1 ~]# tcpdump -i br-tun
  14. tcpdump: WARNING: br-tun: no IPv4 address assigned
  15. tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
  16. listening on br-tun, link-type EN10MB (Ethernet), capture size 65535 bytes
  17. 15:47:38.001148 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from 92:8c:b9:07:1e:41 (oui Unknown), length 300
  18. 15:47:58.001160 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from 92:8c:b9:07:1e:41 (oui Unknown), length 300
  19.  
  20. Network node : tcpdump on br-int
  21.  
  22. [root@newnetwork ~]# tcpdump -i br-int
  23. tcpdump: WARNING: br-int: no IPv4 address assigned
  24. tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
  25. listening on br-int, link-type EN10MB (Ethernet), capture size 65535 bytes
  26. 15:44:16.056112 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from f6:a1:ed:f0:a6:4b (oui Unknown), length 300
  27. 15:44:20.004062 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from f6:a1:ed:f0:a6:4b (oui Unknown), length 300
  28.  
  29. Network node : tcpdump on br-tun
  30.  
  31. [root@newnetwork ~]# tcpdump -i br-tun
  32. tcpdump: WARNING: br-tun: no IPv4 address assigned
  33. tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
  34. listening on br-tun, link-type EN10MB (Ethernet), capture size 65535 bytes
  35. 15:48:18.004130 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from 7e:b8:01:f1:53:4b (oui Unknown), length 300
  36. 15:48:25.005165 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from 7e:b8:01:f1:53:4b (oui Unknown), length 300
  37. 15:48:32.005163 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from 7e:b8:01:f1:53:4b (oui Unknown), length 300
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