I couldn't find any reference on CCO. I will contact the documentation team to get that rectified.
In the meantime, here's a brief description.
The effect of this is to cause RIP to use the routing table metric for
redistributed routes as the RIP metric.
This command should be used in cases where a RIP metric needs to be
transported transparently through another routing protocol. A common
case would be a VPN configuration where customer routes are received
using RIP, the routes are carried across the provider backbone using
BGP, and transmitted to the other customer site using RIP. In this
case the original metric will be carried in the BGP MED value.
Hope this helps,
