CCIE R&S 400-101 V5.1 WRITTEN EXAM ESSENTIALS – NETWORK PRINCIPLES

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CCIE R&S 400-101 V5.1 WRITTEN EXAM ESSENTIALS – NETWORK PRINCIPLES

In a series of blog posts, I will go over each of the Cisco’s official blueprint sections for CCIE R&S 400-101 V5.1 written exam and call out the very essential topics and knowledge base that are must-know for passing the exam. Please note that all of our CCIE Written Exam Cert Study Guides include similar exam essentials at the end of each chapter to reinforce key concepts for our readers.

I hope that you find them useful!

  • There are two common approaches for migrating between routing protocols, namely using administrative distance (AD) and using redistribution with a moving boundary
  • Spanning Tree Protocol (STP) was originally, standardized as IEEE 802.1D most recently in 802.1d-1998, but deprecated as of 802.1d-2004 in favor of Rapid Spanning Tree Protocol (RSTP)
  • IEEE introduced Rapid Spanning Tree Protocol (RSTP) as 802.1w
  • When you migrate from PVST to RPVST, port status cycles through block and learning before moving to forwarding
  • When you enable MST, it also enables RSTP
  • Spanning Tree must use MST mode on EVC ports.
  • LACP and PAGP are supported on EVC ports.
  • Ports with different spanning-tree path costs can form an EtherChannel if they are otherwise compatible configured. Setting different spanning-tree path costs does not, by itself, make ports incompatible for the formation of an EtherChannel.
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