stp
STP: Port ID’s..making sense of it all.
I won’t lie, when I understood the STP tiebreaker process, it was one of those “ohhhhhh” moments. And by understand, I mean, actually proved and saw it work firsthand. Here’s the deal, and I’ll explain any highlights of little things that I found may be confusing for others. First, some key notes about STP and [...]
STP: Root port selection
While doing my reading on Spanning-tree and my INE Vol I labs, I kept referencing back to the book for the tie-breaker criteria for root port selection, and decided I’d post it. In our scenario, we have two switches, SW4, and SW1, which are directly connected with three fast ethernet links. Here’s how STP would [...]
Keeping track of it all: ip access-list log-update threshold
I’ve been doing some great studying lately. Here’s my progress: -Read up to page 85 on the CCIE Exam Cert Guide (4th edition) -Read 10-20 pages of the BCMSN book, used it to review on some layer 2 topics that the exam cert guide didn’t go into to much detail with -Did up to page [...]
The effects of Uplinkfast
Uplinkfast. How many of you can honestly say you’ve used it? Some of you? Most of you? Ok, well I guess I am the minority! I have seen spanning-tree uplinkfast used in configs, but never took the time to really understand the effects of it. The idea is simple enough. You have an access layer [...]
