This table provides interface (port) specific
error-disable status information. Each conceptual row
provides status information about a {interface, vlan}
disabled by a feature.
On a trunk or multi-vlan access interface, a given vlan on
the interface can be error-disabled. In this case, the row is
indexed by the ifIndex for the interface and the vlan
index corresponding to the vlan in question.
If the interface is carrying only 1 vlan or the entire
trunk interface is error-disabled (due to link flaps, for
example) then the vlan index portion of the row index is
0.