[e-nsp] get switch ports macs

[Fabian Extreme]

Hi Youssef,

What you are looping for (system Mac @ per port) was only for internal
use (for STP port priority for example) on Cisco Catalyst, but the new
Catalyst don't have anymore theses System port Mac @.

On Extreme switches this never existed because their conception were
newer. Imagine the MAC @ consumption (a 48 ports switch meant 48 Mac @
+ for every virtual interface)!

What is exactly your need?

Regards, Fabian.