Hello, I am trying to determine WAN link latency using ethereal. I do this by attaching dual NIC PC to two ethernet segments located accross WAN link and running on this PC two instances of ethereal each sniffing on different NIC. Btw, this is done in a lab. TCP packets are sent and received by different two PC's.
I am seeing negative latency, for approx 60 out of 6000 packets. I thought using one PC I would avoid time sync issues. :-( Eg: source LAN 16:57:10.375717 10.42.254.50 -> 10.40.8.16 TCP 62 14711 > 3068 [PSH, ACK] Seq=10004969 Ack=5226877 Win=28888 Len=8 destination LAN 16:57:10.370012 10.42.254.50 -> 10.40.8.16 TCP 62 14711 > 3068 [PSH, ACK] Seq=10004969 Ack=5226877 Win=28888 Len=8 What is the accuracy of the timestamp used by ethereal? The PC running ethereal is Windows XP, Pentium 4 2GHz Compaq. Would anyone have any suggestions on how to accomplish this? Regards Mark Zvolanek +612 9227 0479 [EMAIL PROTECTED]
