Ethernet protocol type configured for service VLAN tags
globally. 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. The node that configure this
value for a single interface is h3cQinQIfServiceTPIDValue,
whose priority is higher than h3cQinQServiceTPIDValue.
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.