Ethereal-users: [Ethereal-users] incorrect packet arrival time.

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From: Rajesh Chundi <RChundi@xxxxxxxxxxxxxxxxx>
Date: Mon, 6 May 2002 13:26:19 +0530
Title: incorrect packet arrival time.

Hello guys,

we are getting erroneous packet arrival time for packets, as can be seen from the output below:

Some packets are originating with the correct time ( May 6 ) ; but some packet are getting originated with wrong time ( May 5).

The same happens even for consecutive packets with identical source and destination IP address.

Where do these packets get the timing info from. Can you help me sort this out?

All the m/c in the lan are synchronised with NTP.

Cheers
Chundi   

Appending here with the summary and detailed sample output for the same:

    No. Time                       Source                Destination           Protocol Info

 77 2002-05-06 12:56:33.2219   RCHUNDI               www.ethereal.com      TCP      1594 > 80 [ACK] Seq=10409730 Ack=936392942 Win=8760 Len=0

     78 2002-05-05 04:37:36.5413   www.ethereal.com      RCHUNDI               HTTP     Continuation
     79 2002-05-06 12:56:33.4617   RCHUNDI               www.ethereal.com      TCP      1594 > 80 [ACK] Seq=10409730 Ack=936392942 Win=8760 Len=0

     80 2002-05-05 04:37:36.7404   Enterasy_f4:ee:31     01:80:c2:00:00:00     STP      Conf. TC + Root = 32768/00:01:f4:f3:bb:73  Cost = 0  Port = 0x8031

     81 2002-05-05 04:37:37.1333   www.ethereal.com      RCHUNDI               HTTP     Continuation
     82 2002-05-06 12:56:34.0537   RCHUNDI               www.ethereal.com      TCP      1594 > 80 [ACK] Seq=10409730 Ack=936392942 Win=8760 Len=0

     83 2002-05-05 04:37:37.9624   RCHUNDI               192.168.253.50        ICMP     Echo (ping) request
     84 2002-05-06 12:56:34.8831   192.168.253.50        RCHUNDI               ICMP     Echo (ping) reply

Frame 77 (66 on wire, 66 captured)
    Arrival Time: May  6, 2002 12:56:33.221986000
    Time delta from previous packet: 116336.920356000 seconds
    Time relative to first packet: 116366.713628000 seconds
    Frame Number: 77
    Packet Length: 66 bytes
    Capture Length: 66 bytes

Frame 78 (1514 on wire, 1514 captured)
    Arrival Time: May  5, 2002 04:37:36.541329000
    Time delta from previous packet: -116336.680657000 seconds
    Time relative to first packet: 30.032971000 seconds
    Frame Number: 78
    Packet Length: 1514 bytes
    Capture Length: 1514 bytes

Frame 79 (66 on wire, 66 captured)
    Arrival Time: May  6, 2002 12:56:33.461714000
    Time delta from previous packet: 116336.920385000 seconds
    Time relative to first packet: 116366.953356000 seconds
    Frame Number: 79
    Packet Length: 66 bytes
    Capture Length: 66 bytes

Frame 80 (60 on wire, 60 captured)
    Arrival Time: May  5, 2002 04:37:36.740496000
    Time delta from previous packet: -116336.721218000 seconds
    Time relative to first packet: 30.232138000 seconds
    Frame Number: 80
    Packet Length: 60 bytes
    Capture Length: 60 bytes

Frame 81 (1514 on wire, 1514 captured)
    Arrival Time: May  5, 2002 04:37:37.133316000
    Time delta from previous packet: 0.392820000 seconds
    Time relative to first packet: 30.624958000 seconds
    Frame Number: 81
    Packet Length: 1514 bytes
    Capture Length: 1514 bytes


Frame 82 (66 on wire, 66 captured)
    Arrival Time: May  6, 2002 12:56:34.053764000
    Time delta from previous packet: 116336.920448000 seconds
    Time relative to first packet: 116367.545406000 seconds
    Frame Number: 82
    Packet Length: 66 bytes
    Capture Length: 66 bytes

Frame 83 (74 on wire, 74 captured)
    Arrival Time: May  5, 2002 04:37:37.962403000
    Time delta from previous packet: -116336.091361000 seconds
    Time relative to first packet: 31.454045000 seconds
    Frame Number: 83
    Packet Length: 74 bytes
    Capture Length: 74 bytes

Frame 84 (74 on wire, 74 captured)
    Arrival Time: May  6, 2002 12:56:34.883102000
    Time delta from previous packet: 116336.920699000 seconds
    Time relative to first packet: 116368.374744000 seconds
    Frame Number: 84
    Packet Length: 74 bytes
    Capture Length: 74 bytes