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I'm running Ubuntu 12.04 in VirtualBox, my server program is running in it, its IP is 192.168.1.105.

My client is running at 192.168.1.107. But the client alway took 10+ seconds to send a package to server. I tcpdump on the server (192.168.1.105), got logs as bellow:

16:58:15.559122 ARP, Request who-has 192.168.1.105 (88:53:95:2e:43:9d (oui Unknown)) tell 192.168.1.107, length 46
16:58:16.376719 ARP, Request who-has 192.168.1.105 (88:53:95:2e:43:9d (oui Unknown)) tell 192.168.1.107, length 46
16:58:17.300393 ARP, Request who-has 192.168.1.105 (88:53:95:2e:43:9d (oui Unknown)) tell 192.168.1.107, length 46
16:58:19.246464 ARP, Request who-has 192.168.1.105 (88:53:95:2e:43:9d (oui Unknown)) tell 192.168.1.107, length 46 16:58:23.238341 ARP, Request who-has 192.168.1.105 (88:53:95:2e:43:9d (oui Unknown)) tell 192.168.1.107, length 46
16:58:30.301090 ARP, Request who-has 192.168.1.105 tell 192.168.1.107, length 46
16:58:30.301115 ARP, Reply 192.168.1.105 is-at 08:00:27:80:81:85 (oui Unknown), length 28

Look at the timestamp, Ubuntu received ARP request but took 15 seconds to reply it. Almost every time my client send a package to server the OS issue an ARP request so the package delay very long.

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  • Why did your MAC address change? What are you doing? Jan 26, 2014 at 16:39
  • I didn't change MAC address. Actually, my client is running on an iOS device, i don't know why iOS keep sending ARP request.
    – Jee
    Jan 27, 2014 at 9:53

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