VIRL for CCNA EIGRP Practice

April 23, 2018 at 10:13 pm

CCNA

In this video, Anthony Sequeira demonstrates using Cisco’s VIRL to practice for an EIGRP configuration your should be ready for in your CCNA R&S exams.

AJSnetworking.com Book Giveaway – ICND2

February 17, 2018 at 4:38 pm

ICND2I will be giving away my tech book collection here at the blog throughout the month as a thank you to my readers!

Second giveaway is ready – the top-rated Odom text for ICND2 (CCNA).

The first reader THAT TRULY NEEDS this book for their studies to respond using the Contact Anthony link at the top of the blog will receive it. You must meet these conditions:

  • Mailing address in the continental US
  • Provide valid full name and mailing address in the email
  • Be a good person 🙂
  • Have not received a free gift from this site prior to this giveaway

I am so glad I can help you in your studies!

Using Tools Like Wireshark to Reinforce Your Studies

January 20, 2018 at 6:00 am

Wireshark

This video reminds students to use tools like Wireshark during their studies to reinforce the topics they are learning!

400-101 CCIE R&S Written – Free Resources – Network Implementation

January 17, 2018 at 8:30 pm

CCIE

Time for another section of our blueprint! This one is boring 😉 Just kidding of course!

1.2 Network implementation and operation

1.2.a Evaluate proposed changes to a network
1.2.a [i] Changes to routing protocol parameters
1.2.a [ii] Migrate parts of a network to IPv6
1.2.a [iii] Routing protocol migration
1.2.a [iv] Adding multicast support
1.2.a [v] Migrate spanning tree protocol
1.2.a [vi] Evaluate impact of new traffic on existing QoS design

Performance Management Best Practices

Enterprise WAN IPv6 Migration Guide

Service Level Management Best Practice

Bandwidth Estimation Configuration Guide

Recommended Books:

IPv6 Address Planning

IPv6 for Enterprise Networks

IPv6: Theory, Protocol, and Practice

Routing TCP/IP Vol II – Multicast Chapters

Rapid Spanning Tree Protocol (RSTP) 802.1w

December 29, 2017 at 8:10 am

rstp

Whether you are pursuing your CCNA, CCNP, CCIE, or many other Cisco Certifications, a deep knowledge of RSTP is critical. In this post, we will detail key facts for you regarding this Layer 2 loop prevention system.

  • 802.1w (RSTP) is an evolution of the classic 802.1D (STP) protocol
  • 802.1D tried to speed things up with the additions of UplinkFast, BackboneFast, and PortFast; the UplinkFast and BackboneFast features are now essentially built into RSTP, while PortFast is still a feature you enable in RSTP if desired
  • 802.1w can also revert back to 802.1D in order to interoperate with legacy bridges on a per-port basis
  • With 802.1D, once in the forwarding state, there is no way to tell from the port state whether the port is root or designated; RSTP decouples the role and the state of a port to address this issue
  • The 802.1D port states are Disabled, Blocking, Listening, Learning, Forwarding; in 802.1w these are simplified to Discarding, Learning, Forwarding
  • The port roles are expanded in 802.1w to include Backup and Alternate ports in addition to Root and Designated; these new port roles help implement the features of UplinkFast into the protocol natively
  • A Backup port receives more useful BPDUs from the same bridge it is on and is a port blocked
  • An Alternate port receives more useful BPDUs from another bridge and is a port blocked
  • RSTP now uses all six bits of the flag byte that remain in order to perform – encoding the role and state of the port that originates the BPDU and handling the proposal/agreement mechanism
  • The RSTP BPDU is now of type 2, version 2; legacy bridges must drop this new BPDU; this makes it easy for an 802.1w bridge to detect legacy bridges connected to it
  • BPDUs are sent every hello-time, and not simply relayed anymore’
  • BPDUs are now used as a keep-alive mechanism between bridges; a bridge considers that it loses connectivity to its direct neighbor root or designated bridge if it misses three BPDUs in a row; this fast aging of the information allows quick failure detection
  • To natively support the BackboneFast type behavior, RSTP accepts inferior BPDUs; when a bridge receives inferior information from its designated or root bridge, it immediately accepts it and replaces the one previously stored; this permits fast acceptance of a new Root port in the topology
  • Rapid transition is the most important feature introduced by 802.1w; RSTP is able to actively confirm that a port can safely transition to the forwarding state without having to rely on any timer configuration; in order to achieve fast convergence on a port, the protocol relies upon two new variables: edge ports and link type
  • RSTP can only achieve a rapid transition to the forwarding state on edge ports and on point-to-point links; the link type is automatically derived from the duplex mode of a port
  • A proposal/agreement process in RSTP aids in very convergence
  • The topology change notification process is overhauled in order to also aid in faster convergence and improve efficiency

For more details on these new features summarized here – check out Understanding Rapid Spanning Tree Protocol (802.1w) This document often forms the basis for plenty of RSTP-related written exam questions from CCENT to CCIE. Note that my summary document here covers most of those questions for you, however!

criers

 

A Quick BGP Quiz for the CCNA

August 16, 2017 at 6:07 pm

Lots of students of CCNA get in a panic about BGP in the exam. Here is a quick quiz to test your knowledge!

How did you score??? Let us know in the comments section!

CCNA - BGP

Start

Congratulations - you have completed CCNA - BGP.

You scored %%SCORE%% out of %%TOTAL%%.

Your performance has been rated as %%RATING%%


Your answers are highlighted below.
Return
Shaded items are complete.
12345
67End
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InformIT (Pearson Education)

CCNA – IP Networks Quiz

August 7, 2017 at 10:26 pm

Enjoy this quiz hitting a variety of fun IP network topics from the Cisco CCNA certification area. Note that many of these topics also apply to a wide variety of certifications from a wide variety of vendors – including CompTIA A+ and Network+.

CCNA - IP Networks

Start

Congratulations - you have completed CCNA - IP Networks.

You scored %%SCORE%% out of %%TOTAL%%.

Your performance has been rated as %%RATING%%


Your answers are highlighted below.
Return
Shaded items are complete.
12345
67End
Return