400-101 CCIE R&S Written – Free Resources – Switch Admin and VLANs

January 28, 2018 at 10:37 am


Here is the latest installment of resources. This covers the first chunk of the massive Layer 2 section.

2.1 LAN switching technologies
2.1.a Implement and troubleshoot switch administration
2.1.a [i] Managing MAC address table
2.1.a [ii] errdisable recovery
2.1.a [iii] L2 MTU
2.1.b Implement and troubleshoot layer 2 protocols
2.1.b [i] CDP, LLDP
2.1.b [ii] UDLD
2.1.c Implement and troubleshoot VLAN
2.1.c [i] Access ports
2.1.c [ii] VLAN database
2.1.c [iii] Normal, extended VLAN, voice VLAN
2.1.d Implement and troubleshoot trunking
2.1.d [i] VTPv1, VTPv2, VTPv3, VTP pruning
2.1.d [ii] dot1Q
2.1.d [iii] Native VLAN
2.1.d [iv] Manual pruning

LAN Switching

Campus LAN Design Guide

Managing the Switch

errdisable recovery



Configuring VLANs

InterVLAN Routing



Troubleshooting the 3K


Cisco LAN Switching Fundamentals




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

January 26, 2018 at 2:25 pm

CCIE Resources

Here are more great resources for this section of the CCIE RS written and lab exam!

  • 1.3 Network troubleshooting
    • 1.3.a Use IOS troubleshooting tools
      • 1.3.a [i] debug, conditional debug
      • 1.3.a [ii] ping, traceroute with extended options
      • 1.3.a [iii] Embedded packet capture
      • 1.3.a [iv] Performance monitor
    • 1.3.b Apply troubleshooting methodologies
      • 1.3.b [i] Diagnose the root cause of networking issue [analyze symptoms, identify and describe root cause]
      • 1.3.b [ii] Design and implement valid solutions according to constraints
      • 1.3.b [iii] Verify and monitor resolution
    • 1.3.c Interpret packet capture
      • 1.3.c [i] Using Wireshark trace analyzer
      • 1.3.c [ii] Using IOS embedded packet capture

Important Information on Debug Commands

Extended Ping and Extended Traceroute

Cisco Device Packet Capture

Embedded Packet Capture

Troubleshooting Overview

Catalyst Switch Troubleshooting 


Troubleshooting IP Routing Protocols


CCIE R&S Critical Study Links

January 22, 2018 at 6:00 am


OK, this post is just as much for me as it is for my readers. I find myself constantly searching for these critical links and I wanted to get them all in one place! Did I miss any? Of course I did – please let me know of your additions by commenting on this post and I will update accordingly!

Exam Topics


Lab Equipment and Software


Cisco Documentation


Reading List


Studying for the CCIE RS Written and Lab – EIGRP Stub

January 13, 2018 at 12:41 pm


In this video, Anthony Sequeira gives a tip on how we should consider preparing for the CCIE written and lab exams simultaneously.

400-101 CCIE R&S Written – Free Resources – UDP Operations

January 6, 2018 at 11:28 am


If a TCP session is like a phone call – then a UDP transmission is like a postcard! Here are the free study resources around UDP!

1.1.f Explain UDP operations
1.1.f [i] Starvation
1.1.f [ii] Latency
1.1.f [iii] RTP/RTCP concepts

The UDP Protocol

UDP Broadcast Flooding

Defending Against Distributed DoS Attacks

IP SLA Configuration Guide