H:\>ping 10.10.2.65 -l 1600
Pinging 10.10.2.65 with 1600 bytes of data:
Reply from 10.10.2.65: bytes=1600 time=3ms TTL=58
Reply from 10.10.2.65: bytes=1600 time=3ms TTL=58
Reply from 10.10.2.65: bytes=1600 time=3ms TTL=58
Reply from 10.10.2.65: bytes=1600 time=3ms TTL=58
master:0}
ex4200> monitor traffic interface ae0.0 matching "host 172.21.21.62 and not tcp port 22" no-resolve
verbose output suppressed, use <detail> or <extensive> for full protocol decode
Address resolution is OFF.
Listening on ae0.0, capture size 96 bytes
10:20:39.945247 In IP truncated-ip - 1440 bytes missing! 172.21.21.62 > 10.10.2.65: ICMP echo request, id 1, seq 849, length 1480
10:20:39.945272 In IP truncated-ip - 88 bytes missing! 172.21.21.62 > 10.10.2.65: icmp
10:20:39.945345 Out IP truncated-ip - 1440 bytes missing! 10.10.2.65 > 172.21.21.62: ICMP echo reply, id 1, seq 849, length 1480
10:20:39.945390 Out IP truncated-ip - 88 bytes missing! 10.10.2.65 > 172.21.21.62: icmp
10:20:40.950871 In IP truncated-ip - 1440 bytes missing! 172.21.21.62 > 10.10.2.65: ICMP echo request, id 1, seq 850, length 1480
10:20:40.950898 In IP truncated-ip - 88 bytes missing! 172.21.21.62 > 10.10.2.65: icmp
10:20:40.950974 Out IP truncated-ip - 1440 bytes missing! 10.10.2.65 > 172.21.21.62: ICMP echo reply, id 1, seq 850, length 1480
10:20:40.951021 Out IP truncated-ip - 88 bytes missing! 10.10.2.65 > 172.21.21.62: icmp
10:20:41.956501 In IP truncated-ip - 1440 bytes missing! 172.21.21.62 > 10.10.2.65: ICMP echo request, id 1, seq 851, length 1480
10:20:41.956529 In IP truncated-ip - 88 bytes missing! 172.21.21.62 > 10.10.2.65: icmp
10:20:41.956605 Out IP truncated-ip - 1440 bytes missing! 10.10.2.65 > 172.21.21.62: ICMP echo reply, id 1, seq 851, length 1480
10:20:41.956666 Out IP truncated-ip - 88 bytes missing! 10.10.2.65 > 172.21.21.62: icmp
10:20:42.961358 In IP truncated-ip - 1440 bytes missing! 172.21.21.62 > 10.10.2.65: ICMP echo request, id 1, seq 852, length 1480
10:20:42.961387 In IP truncated-ip - 88 bytes missing! 172.21.21.62 > 10.10.2.65: icmp
10:20:42.961462 Out IP truncated-ip - 1440 bytes missing! 10.10.2.65 > 172.21.21.62: ICMP echo reply, id 1, seq 852, length 1480
10:20:42.961509 Out IP truncated-ip - 88 bytes missing! 10.10.2.65 > 172.21.21.62: icmp
^C
148 packets received by filter
0 packets dropped by kernel
1-)When sending icmp with size 1600 from windows machine to the ex4200 in VC, ae0 -10.10.2.65. Real time monitor traffic interface on ex4200
showing a few things:
It says ip truncated-ip - 1440 bytes missing.... What does missing mean? what are 1440 and 1480 bytes and 88 bytes?
2-)Can we understand from the output with "truncated-ip - XXXX or XX bytes missing" fragmentation is definitely happening?
3-)From windows machine sending size -l 1600, is it mss or not mss, if it is not what is it?
Note: All network path mtu size is 1500 bytes. and I did ssh to ex4200 in vc.
Thx,
Ar