Jan Janak writes:
But there are some user agents that strip the lr parameter when generating Route header fields (i.e. Record-Route contained lr parameter but Route created by the user-agent didn't). If that is your case then you can use modparam("rr", "enable_full_route", 1) which will insert ;lr=on instead of just ;lr which worked for us.
lr=on may help in case of broken UAs, but are you sure that all RFC3261 compliant AUs will understand lr=on as the lr parameter?
-- juha