Две фрибсд, две tau-pci, два модема, Комкоровская оптика (канал) промеж ними
С обоих концов:
cp0 (v35) ppp keepalive=off extclock dpll=off nrzi=off invrclk=off invtclk=off

bash-2.05b# ping -s 25152 -c3 62.117.81.131
PING 62.117.81.131 (62.117.81.131): 25152 data bytes
25160 bytes from 62.117.81.131: icmp_seq=0 ttl=63 time=1636.418 ms
25160 bytes from 62.117.81.131: icmp_seq=1 ttl=63 time=1636.386 ms
25160 bytes from 62.117.81.131: icmp_seq=2 ttl=63 time=1636.348 ms

--- 62.117.81.131 ping statistics ---
3 packets transmitted, 3 packets received, 0% packet loss
round-trip min/avg/max/stddev = 1636.348/1636.384/1636.418/0.029 ms
bash-2.05b# ping -s 25153 -c3 62.117.81.131
PING 62.117.81.131 (62.117.81.131): 25153 data bytes

--- 62.117.81.131 ping statistics ---
3 packets transmitted, 0 packets received, 100% packet loss

Где у меня ошибка? В настройках, в ДНК, или в канале?