CCFH - Do a retransmitted CCR message set the T bit during CCFH failover?

Question

CCFH - Do a CCR message set the T bit during failover ?

Scenario

1. I have a client and 2 OCS servers.
2. I didnt get the CCA response (CCA -I ) from first OCS.
3. After my TX timer expiry I am retransmitting CCR I to second OCS.

Question here is - Do the retransmitted CCR needs the T bit to be set ?

In RFC I cannot see this specifically mentioned anywhere

Answer 1

You can find the answer in the RFC 4006 Diameter Credit-Control Application

If the timer Tx expires, the credit-control client MUST continue the
service and wait for a possible late answer. If the request times
out, the credit-control client re-transmits the request (marked with
T-flag) to a backup credit-control server, if possible. If the re-
transmitted request also times out, or if a temporary error is
received in answer, the credit-control client buffers the request if
the value of the Direct-Debiting-Failure-Handling AVP is set to
TERMINATE_OR_BUFFER.