For CIFS replications where replicaiton is handled by the DR itself, there is a table where you can modify the bandwidth limits for replications by going to System Configuration -> Networking.
However, for RDA containers where replication jobs are handled by Netvault or vRanger, this table is not populated, so setting bandwidth limits must be done via command line.
As an example you can log in via ssh / putty session, and run:
rda --limit --speed 10mbps --target other-dr-ip-or-host
Then you can view the table with:
rda --show --limits