Comment 14 for bug 1311804

Well I can "see" 5K interfaces on one network node here, and that doesn't include the other end of the veth pair that it's plumbing. The problem we were seeing with the sudo (and /sbin/ip) overhead was there was a cumulative effect when the number of network interfaces was high, and when you make 10-15 sudo calls creating a neutron router it starts adding up. That's why I'm pushing back here as we saw this change helped.