* Apply routing function on the affected upstream and downstream prefixes,
* i.e. either set or clear RTF_PROXY on the cloning prefix route; all route
* entries that were cloned off these prefixes will be blown away. Caller
* Apply routing function on the affected upstream and downstream prefixes,
* i.e. either set or clear RTF_PROXY on the cloning prefix route; all route
* entries that were cloned off these prefixes will be blown away. Caller