Specifies the interface type for the TopN sampling.
all -- all applicable interfaces in the system.
ethernet -- all Ethernet interfaces in the system.
fastEthernet -- all FastEthernet interfaces in the system.
gigaEthernet -- all GigabitEthernet interfaces in the
system.
tenGigaEthernet -- all TenGigabitEthernet interfaces
in the system.
portChannel -- all Port-channel interfaces in the system.
layer2 -- all layer-2 interfaces in the system.
layer3 -- all layer-3 interfaces in the system.
fortyGigaEthernet -- all FortyGigabitEthernet interfaces
in the system.
This object may not be modified if the associated
interfaceTopNRowStatus object is equal to 'active'.