Forum Discussion

Mohit_Rathee's avatar
Mohit_Rathee
Icon for Nimbostratus rankNimbostratus
Jul 07, 2019

HTTP Post across Mutiple TCP Segment

When attempting to send HTTP post request across multiple TCP segments the request fails. We receive a response that HTTP Body is missing from the server. . But if i send the same HTTP post reques...
devops
HTTP_POST
iRules
LTM
Segmentation
tcp
Mohit_Rathee's avatar
Mohit_Rathee
Icon for Nimbostratus rankNimbostratus
Jul 10, 2019

Thanks @Dario Garrido and @Stanislas Piron for feedback.

What Stanislas mentioned is exactly the issue i am facing.

I am using F5 version 12.1.3.1 in which the value of tm.tcplargereceiveoffload is disable ,will enable it in next maintenance window and will retry.

L4 Virtual Server has the same issue and didn't solve the problem.

 

During further troubleshooting i capture certain parameters. As you can see the content length header field in first image has a value of 393, but when i capture http request from IRULE and paste it in Logs the content length field value is Zero.

 

I am also attaching tcp dump i capture fro both the incoming and outgoing traffic from F5 Ltm.

 

862 -469 = 393 thats the excat amount of HTTP Body DATA,

 

Outgoing traffic