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EtherChannel – Lesson and Lab
Cisco IOS software allows administrators to combine multiple physical links in the chassis into a single logical link. This provides an ideal solution for load sharing, as well as link redundancy, and can be used by both Layer 2 and Layer 3 sub-systems.These are referred to as Etherchannels. https://youtu.be/AWFTIT4JjFo Understanding EtherChannels An EtherChannel is comprised…
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Routing Protocol Design
This blog post will cover the following topics: Routing Protocol Concepts Routing Information Protocol (RIP) Enhanced Interior Gateway Routing Protocol (EIGRP) Open Shortest Path First (OSPF) Intermediate System to Intermediate System (IS-IS) IPv6 Routing Concepts https://youtu.be/xTYtG0F5OqY A high-level analysis of network routing protocols, with a focus on the architectural aspects that dictate the routing protocol…
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Advanced Routing Protocol Design – OSPF, EIGRP and BGP
This blog covers the following topics: Stable and scalable routing designs for EIGRP for IPv4 Stable and scalable routing designs for OSPF for IPv4 Stable and scalable routing designs for BGP for IPv4 We cover these topics in the CCNP ENARSI course. This chapter is essential for CCNP ENARSI certification and it will begin by…
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Prevent STP Attacks
Spanning-Tree Protocol (STP) Attacks The Spanning-Tree Protocol (STP) is used in redundantly connected Layer 2 networks to prevent loops by placing interfaces or ports in either a blocking or a forwarding state. Because STP is a core component and requirement of the CCNA certification, this section will not be covered in detail. Instead, this section…
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RSTP Tutorial – Rapid Spanning Tree Protocol
Rapid Spanning Tree Protocol Overview The IEEE 802.1D standard was designed at a time when the recovery of connectivity after an outage within a minute or so was considered adequate performance. In the IEEE 802.1D Spanning Tree Protocol (STP) , recovery takes around 50 seconds, which includes 20 seconds for the Max Age timer to…
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