The test case for speed_forced requires a real switch with a compatible transceiver. Will fail on vEOS. Should we keep this test?
veos5(config)#int e1
veos5(config-if-Et1)#speed forced 40gfull
% Speed and duplex settings are not compatible with transceiver for interface Ethernet1.
I used a dynamic variable type for the options. False will unset, absent does nothing and a string will attempt to set as opposed to the norm of absent assuming unset. Any opposition to this?
Fixes #23