1. https://www.cisco.com/en/US/prod/collateral/routers/ps5763/CRS-3_16-Slot_DS.html.
2. http://www.cisco.com/en/US/prod/collateral/routers/ps5763/CRS-1x100GE_DS.html.
3. IEEE Standard for Local and Metropolitan Area Networks. Media Access Control (MAC) Bridges. IEEE Standard 802.1D-1998, 1998.
4. IEEE Standard for Local and Metropolitan Area Networks. Media Access Control (MAC) Bridges – Amendment 2: Rapid Reconfiguration. IEEE Standard 802.1w-2001, 2001.
5. IEEE Standard for Local and Metropolitan Area Networks. Virtual Bridges Local Area Networks – Amendment 3: Multiple Spanning Trees. IEEE Standard 802.1s-2002, 2002.