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| 2020-03-10 09:05:28 +0000 | marked best answer | Duplicate ACK and TCP Retransmission I'm doing some scp transfers between an AIX and a Linux in two separated LAN (I have a VPN between them). Sometimes the connection ends well, so I get 50MB/s. In many other cases, instead, the connections starts fast and then drops until it ends with a low throughput, around 4-5 MB/s. These are the test I made (file dimension: 1GB) As you can see, there's some cases where my connection is very low. I made some tcpdump AIX-side and I found lots of DupACK and TCP Retransmissions. This is my dump seen from the AIX: Dump AIX to Linux Could you help me understand what is wrong? I made also a dump from the firewall. Let me know if this may help Thank you :) |
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| 2020-03-09 12:09:59 +0000 | commented answer | Duplicate ACK and TCP Retransmission Hi Phil, these are two captures I made simultaneously (sender+receiver). Test number 1 got lost on the street :) Test |
| 2020-03-04 10:05:11 +0000 | commented question | Duplicate ACK and TCP Retransmission Hi, Here you will find the firewall capture, one with an MTU set to 1460 MTU_1460_pcap and another one with an MTU set t |
| 2020-03-04 10:04:54 +0000 | commented question | Duplicate ACK and TCP Retransmission Hi, Here you will find the firewall capture, one with an MTU set to 1460MTU_1460_pcap and another one with an MTU set to |
| 2020-03-03 20:09:35 +0000 | asked a question | Duplicate ACK and TCP Retransmission Duplicate ACK and TCP Retransmission I'm doing some scp transfers between an AIX and a Linux in two separated LAN (I hav |
| 2020-03-02 10:07:02 +0000 | commented question | Dup ACK and retransmissions - AIX to Linux Hi again, I think my AIX is sending large packets because of largesend option (https://www.ibm.com/support/pages/what-di |
| 2020-02-29 15:43:51 +0000 | commented question | Dup ACK and retransmissions - AIX to Linux Hi, I know that I have a full duplex 1Gb/s between the two ends. Actually I don't know if the interfaces auto negotiate |
| 2020-02-29 14:53:30 +0000 | asked a question | Dup ACK and retransmissions - AIX to Linux Dup ACK and retransmissions - AIX to Linux Hi all, Hope you doing great. I have an issue concerning an AIX-Linux commu |
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