On Thu, Dec 06, 2007 at 10:18:47PM -0500, Hansang Bae wrote: > Reynolds, Tom wrote:[snip: moving datacenter. using ftp to test the > throughput] > > > > Downloads and uploads (from a DSL line) to Philadelphia. Everything is > > great. We get a solid 3 Mb/s download and a solid 750k upload. > > > > Downloads from Valley Forge to the DSL line are very poor, with almost > > double the time to download the same 10 MB file. There are frequent > > drops from the 3Mb/s range to about 500k. I have actually seen worse > > than this. > > > > After looking at the sniffer logs, here is what I see: (middle 10 > > packets 8950-8959, right about the time of the bandwidth drops). > > Note that I am getting a ton of: > > TCP Previous segment lost > > TCP Dup ACK > > TCP Retransmission
Have you checked the physical port settings for the servers and switches in Valley Forge? It could just be the server on fixed (100Mb/Full duplex?) and the switch on auto (or vice versa). Do you have multiple servers at Valley Forge? Do they have good network performance between them? Cheers, Sake _______________________________________________ Wireshark-users mailing list Wireshark-users@wireshark.org http://www.wireshark.org/mailman/listinfo/wireshark-users
