Ethernet protocol type configuring for a global value.
The ethernet protocol type is also the TPID(Tag Protocol
Identity) field of a VLAN tag described in 802.1q
document. This value can be also configured for an
individual interface or VLAN. The node that configure
this value for a single interface is h3cQinQIfEthernetType,
whose priority is higher than h3cQinQEthernetTypeValue.
That means, if the value configured for a interface is
different from the global value, the switch will select
the configuration of the interface and ignore the global
configuration. The ethernet protocol type of node
h3cQinQVidEthernetType that configured for a VLAN has
the highest priority.