LinuxQuestions.org

LinuxQuestions.org (/questions/)
-   Linux - Networking (https://www.linuxquestions.org/questions/linux-networking-3/)
-   -   Why does server miss the ack from client while tcp handshaker? (https://www.linuxquestions.org/questions/linux-networking-3/why-does-server-miss-the-ack-from-client-while-tcp-handshaker-801663/)

llclown 04-12-2010 10:10 PM
Why does server miss the ack from client while tcp handshaker?
 
We have a problem with tcp link.
Os version: linux 2.6.9

Client will connect 2 tcp links to server.
One link is ok but another can't.

From tcpdump, we see:
1. client SYN-----> server
2. server SYN/ACK---> client
3. client ACK ----> server
4. client data ----> server
5. client retransmit data some times ----> server
6. server SYN/ACK ----> client (weird, it look like server miss the step 3)

Does anyone have some idea of this?

sagarkha 04-13-2010 02:22 AM
which applications you are using on client and server side? Is your client a browser connecting to a webserver?

cola 04-13-2010 07:10 AM
Quote:
Originally Posted by llclown (Post 3933563)
We have a problem with tcp link.
Os version: linux 2.6.9

Client will connect 2 tcp links to server.
One link is ok but another can't.

From tcpdump, we see:
1. client SYN-----> server
2. server SYN/ACK---> client
3. client ACK ----> server
4. client data ----> server
5. client retransmit data some times ----> server
6. server SYN/ACK ----> client (weird, it look like server miss the step 3)

Does anyone have some idea of this?
Post complete result of tcpdump from terminal.
And which linux distribution are you on?


All times are GMT -5. The time now is 08:54 AM.