(en) Shuang Yu,IEEE approves new IEEE 802.1aq™ Shortest path bridging.IEEE Standards Association.Gearchiveerd op 14 mei 2013.Geraadpleegd op 19 June 2012.“Using the IEEE’s next-generation VLAN, called a Service Interface Identifier (I-SID), it is capable of supporting 16 million unique services compared to the VLAN limit of four thousand.”