Hash Persistence based on HTTP Header "SV" tag

Then you're in the right forum. 🙂

Must confess that I have not done this particular thing, but try this?

First create this irule:

when HTTP_REQUEST {
  if { [HTTP::header exists "sv"] } {
    persist uie [HTTP::header value "sv"]
  }
}

Then create a universal persistence profile and choose the irule you just created as "irule" in the configuration

Assign the persistence profile to the virtual server.

/Patrik