This blog was originally started to better help me understand the technologies in the CCIE R&S blueprint; after completing the R&S track I have decided to transition the blog into a technology blog.
CCIE #29033
This blog will continue to include questions, troubleshooting scenarios, and references to existing and new technologies but will grow to include a variety of different platforms and technologies. Currently I have created over 185 questions/answers in regards to the CCIE R&S track!! Note: answers are in the comment field or within "Read More" section.
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STP 802.1D
Portfast
- Ports coming up are put into forwarding states
- TCN are not generated when a port comes up or down
Uplinkfast
- detects a directly connected failure and enables a new root port immediately
- increases the root priority to ensure that the switch will not become the root
- sets the port cost to 3000
- tracks alternate root ports
Backbonefast
- speeds convergence when a failure occurs and is indeireclty located. Reduces convergence from 50 seconds to approx 30 seconds.
- all switches need to bne configured with backbonefast
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