You have a customer with an MDS fabric that is experiencing a performance problem. You suspect that the problem is due to a BB credit starvation issue with a host HBA. The customer has both a DS-PAA- 2 and a Fibre Channel Analyzer on location. You want to collect a trace and look at the R_RDY flows between the MDS and the host. Which of the following actions is the best way to start troubleshooting this problem?