This document contains a list of 13 references to technical documents related to networking protocols such as spanning tree protocol, multiple instance spanning tree protocol, per VLAN spanning tree protocol, Flexlink, and TRILL. The references provide documentation on configuration guides, design guides, and blog posts about these protocols from Cisco, H3C, and other networking organizations.

7. References
• http://blog.ipspace.net/2015/06/another-spectacular-layer-2-failure.html
• https://cciethebeginning.wordpress.com/2008/10/15/differences-between-pvst-and-pvst/
• http://blog.ine.com/2008/07/17/pvst-explained/
• http://blog.ine.com/2010/04/05/understanding-stp-and-rstp-convergence/
• http://www.cisco.com/c/en/us/support/docs/lan-switching/spanning-tree-protocol/24062-146.html
• http://www.cisco.com/c/en/us/support/docs/lan-switching/spanning-tree-protocol/24248-147.html
• http://blog.ine.com/2010/02/22/understanding-mstp/
• http://www.cisco.com/c/en/us/support/docs/lan-switching/multiple-instance-stp-mistp-8021s/116464-configure-pvst-00.html
• http://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Data_Center/DC_Infra2_5/DCInfra_5.html
• http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/configuration/guide/book/flexlink.html
• http://www.cisco.com/c/en/us/td/docs/switches/metro/me3400/software/release/12-
2_40_se/configuration/guide/scg/swrep.html
• www.h3c.com/portal/download.do?id=681124
• http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/configuration/guide/book/vss.html
• http://www.cisco.com/c/en/us/products/collateral/switches/nexus-5000-series-switches/design_guide_c07-625857.html
• https://nanog.org/meetings/nanog50/presentations/Monday/NANOG50.Talk63.NANOG50_TRILL-SPB-Debate-Roisman.pdf