Comment 1 for bug 1528137

According to the Networking API reference [1], there is no detail description about "remote_ip_prefix", but considering the security group rule API definition, it is reasonable to regard "remote_ip_prefix" as destination address/cidr for egress traffic and vice versa.

[1] http://developer.openstack.org/api-ref-networking-v2-ext.html#createMeteringLabelRule