Forum Discussion
dissapat
Altostratus
AltostratusF5 cookie passive method
Hello, I am learning about F5 cookie persistence, and I have searched through many of posts. I curious that when we use cookie passive method, how can F5 know that which client belongs to which ser...
whisperer
MVP
MVPYou will not find anything. F5 doesnt care... since passive mode is where the server and client interact with cookies and the normal timeout/expiration is evaluated by the server when a cookie is presented back on subsequent connections.
- HTTP Cookie PassiveUsing the HTTP Cookie Passive method is unlike the other cookie persistence methods. The BIG-IP system does not insert or search for blank Set-Cookie headers in the response from the server. This method does not try to set up the cookie. With this method, the server provides the cookie, formatted with the correct server information and timeout.
dissapatAltostratus
AltostratusCan we check that where F5 collect the information of cookie?
- whisperer
Think you are missing the point of a passive cookie:
In Passive mode the Big-IP does not search or insert cookies into the HTTP header of responses from the server
- dissapat
But when client send traffic to F5, how F5 knows that which server that the traffic need to be sent?
c_fletcherEach server is configured to send the client a cookie that indicates which pool member to use for any further communication during the session. If the server is not configured to issue a cookie in the correct format, passive mode persistence will not work properly.
The cookie uses the format detailed in this article: K6917: Overview of BIG-IP persistence cookie encoding