| 1. | Webb, Building Cisco Multilayer Switched Networks, Indianapolis, Cisco Press, 2001, p. 165. |
| 2. | "Virtual LANs/VLAN Trunking Protocol (VLANs/VTP)," http://www.cisco.com/en/US/tech/tk389/tk689/tsd_technology_support_protocol_home.html. |
| 3. | "Troubleshooting IP Multilayer Switching," http://www.cisco.com/en/US/products/hw/switches/ps700/products_tech_note09186a00800f99bc.shtml. |
| 4. | Cisco switch products home page, http://www.cisco.com/en/US/products/hw/switches/index.html. |
| 5. | Cisco router products home page, http://www.cisco.com/en/US/products/hw/routers/index.html. |
| 6. | "Troubleshooting IP Multilayer Switching," http://www.cisco.com/en/US/products/hw/switches/ps700/products_tech_note09186a00800f99bc.shtml. |
| 7. | "Cisco Express Forwarding Overview,"http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fswtch_c/swprt1/xcfcef.htm. |
| 8. | Cisco switch products home page, http://www.cisco.com/en/US/products/hw/switches/index.html. |
| 9. | "Hierarchical Campus Design At-A-Glance,"http://www.cisco.com/application/pdf/en/us/guest/netsol/ns24/c643/cdccont_0900aecd800d8129.pdf. |