Já agora
WARNING: probably, rcvbuf is not enough to hold preload.
PING dispatch.kahuna.glbdns.microsoft.com (157.55.0.135) 56(84) bytes of data.
64 bytes from 157.55.0.135: icmp_req=3 ttl=246 time=77.0 ms
64 bytes from 157.55.0.135: icmp_req=4 ttl=246 time=77.7 ms
64 bytes from 157.55.0.135: icmp_req=5 ttl=246 time=79.2 ms
64 bytes from 157.55.0.135: icmp_req=6 ttl=246 time=81.2 ms
$ sudo ping -l 500 www.hotmail.com
PING dispatch.kahuna.glbdns.microsoft.com (157.55.0.135) 56(84) bytes of data.
64 bytes from 157.55.0.135: icmp_req=1 ttl=246 time=72.2 ms
64 bytes from 157.55.0.135: icmp_req=2 ttl=246 time=73.0 ms
64 bytes from 157.55.0.135: icmp_req=3 ttl=246 time=74.9 ms
64 bytes from 157.55.0.135: icmp_req=4 ttl=246 time=76.3 ms
Mesmo assim, não sei se essa flag do preload está certa, sendo que a -s indica o tamanho do pacote:
PING dispatch.kahuna.glbdns.microsoft.com (157.55.43.19) 1464(1492) bytes of data.
1472 bytes from origin.du114w.dub114.mail.live.com (157.55.43.19): icmp_req=1 ttl=246 time=87.2 ms
1472 bytes from origin.du114w.dub114.mail.live.com (157.55.43.19): icmp_req=2 ttl=246 time=86.5 ms
1472 bytes from origin.du114w.dub114.mail.live.com (157.55.43.19): icmp_req=3 ttl=246 time=87.4 ms
^C
--- dispatch.kahuna.glbdns.microsoft.com ping statistics ---
4 packets transmitted, 3 received, 25% packet loss, time 3003ms
rtt min/avg/max/mdev = 86.584/87.082/87.400/0.356 ms
$ ping -s 1024 www.hotmail.com
PING dispatch.kahuna.glbdns.microsoft.com (157.55.43.19) 1024(1052) bytes of data.
1032 bytes from origin.du114w.dub114.mail.live.com (157.55.43.19): icmp_req=1 ttl=246 time=80.4 ms
1032 bytes from origin.du114w.dub114.mail.live.com (157.55.43.19): icmp_req=2 ttl=246 time=80.5 ms
1032 bytes from origin.du114w.dub114.mail.live.com (157.55.43.19): icmp_req=3 ttl=246 time=80.1 ms
1032 bytes from origin.du114w.dub114.mail.live.com (157.55.43.19): icmp_req=4 ttl=246 time=86.8 ms
^C
--- dispatch.kahuna.glbdns.microsoft.com ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3003ms
rtt min/avg/max/mdev = 80.152/82.007/86.852/2.801 ms