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This allows multiple behavioral nic models to run on one OS thread
using boost fibers (user-level threads)

Enables overriding for multi NIC runner in next step

All devices will somehow need this, might as well stick it in the base
class.

Reduces the risk of getting the same mac in multi-host clusters

A bit too short for a fast qemu timing.

This breaks large mtu experiments, but when proxied makes a huge
difference. Should make this a runtime parameter.

Only show one message when we start to wait, and one when we succeeded.

To support use-cases with multiple NIC interfaces.

Useful for huge pages.

Also fix identifier case

Also fix identifier case