Forum Discussion
David_Chen_2112
Nimbostratus
NimbostratusHow to switch from layer 7 to layer 4?
We would like to use http header (which requires layer 7) to decide which server to connect to, then use layer 4 for the connection so that we get the benefit of performance and lower mirroring overhead.
Does anyone know how that can be done?
Many thanks in advance!
David_Chen_2112Thanks for your repsonse, Colin.
The issue is that we cannot pick layer 4 for the virtual server because we need to do the http header inspection. And when it is not at layer 4, there appears to be a lot more overhead if mirroring to the secondary F5 box is enabled. It is that overhead that we are concerned about.- Ahh, so you're talking about the load balancing profile settings. Gotcha.
Well, unfortunately as you've pointed out above, you do need to enable the appropriate layer 7 profile if you're going to be doing that HTTP inspection. I'm not aware of a way around this.
Perhaps there are some tricks out there to minimize mirroring overhead. I'd poke around the forums and search for some pertinant posts. I'll take a look too, but I don't remember anything like this off the top of my head.
Colin
