I have the need to limit bandwidth used for a weekly copy job between our Production environment and our DR environment. We have a low CIR on our DR environment, so I would like to keep the bandwidth as low as possible between the sites to ensure that all data gets transferred before the rebuild task occurs, but not have to pay penalties for exceeding the CIR.

The current configurations that I have are as follows:

access-list 120 permit ip host 10.1.10.10 host 10.240.13.10

10.1.10.10 is the server that holds the information to copy, and performs the copy job; 10.240.13.10 is the destination server. These two servers are connected via VPN.

class-map match-all DR_Flow_class

match access-group 120

policy-map DR_Policy_Map_DR

class DR_Flow_class

police 4000000 bps 4000000 byte conform-action transmit exceed-action drop

I would like to limit the bandwidth to a maximum transfer rate of 4 Mbps. Would the above command be the best method of limiting the bandwidth? What is the difference between the police 4000000 bps, and the 4000000 byte parameters?

By the way, the switch that these configs reside on is a Cisco 4507r running 12.2(25)EWA6.

Any input is greatly appreciated!