CCIE Routing & Switching Technical Articles

CCIE Routing and Switching Technical Articles

Search for technical study articles on various CCIE R&S lab topics. Written by IPexpert's highly qualified CCIE Instructors, you will find helpful tips and hints and instructional documents.

CCIE R&S Lab Fundamentals Challenge

• The CCIE R&S Lab Fundamentals and Written Bootcamp
• CCIE RS Lab Fundamentals and Written Challenge 1
• CCIE RS Lab Fundamentals and Written Challenge 2
• CCIE RS Lab Fundamentals and Written Challenge 3
• CCIE RS Lab Fundamentals and Written Challenge 4
• CCIE RS Lab Fundamentals and Written Challenge 5
• CCIE RS Lab Fundamentals and Written Challenge 6 
• CCIE RS Lab Fundamentals and Written Challenge 7
• CCIE RS Lab Fundamentals and Written Challenge 8
• CCIE R&S Lab Fund. Bootcamp – Lab Practice – Frame Relay
• CCIE R&S Lab Fund. Bootcamp – Frame Relay Solved
• 802.1s Lab Exam Challenge
• 802.1s Lab Exam Challenge Solved
• Chapter Challenge: BSR Sample Trouble Tickets Solutions
• Interactive Troubleshooting Blog – Basic BGP 1
• Interactive Troubleshooting Blog – Basic BGP 1 – SOLUTION!
• Interactive Troubleshooting Blog – Basic PfR/OER 1
• Interactive Troubleshooting Blog: OSPF Routing
• OSPF Virtual Links and IP Unnumbered Interfaces

CCIE R&S Lab Fundamentals Articles

• CCIE RS Sucess - The Importance of Fundementals
• Making the CCIE R&S Study Plan - Services
• Built it in Layers
• CCIE R&S Lab Fundamentals and Written Practice – EIGRP
• Understanding LoopGuard for the CCIE R&S Written Exam
• Unidirectional Link Detection (UDLD) for the CCIE R&S Written
• Bidirectional Forwarding Detection (BFD) in the CCIE R&S Written
• “Router on a Stick” for the CCIE R&S Written and Lab Exam
• Q-in-Q Tunneling for the CCIE R&S Written and Lab Exam
• Manual Configured Tunnels (MCT) for IPv6
• GRE Tunnels for IPv6 Transition
• Cisco Certification Exam Review: 350-001 CCIE Routing and Switching Written Version 4
• Bidirectional PIM (BIDIR-PIM)
• Common Issues with IGMP
• SNMP Theory and Operation
• SNMP Practical Exercises (Hands-on)
• Introduction to Label Distribution (excerpt)
• A Review of Local Privilege Authentication and Authorization

OSPF Over Frame-Relay

• OSPF over Frame-Relay – Part 1: Non-Broadcast
• OSPF over Frame-Relay – Part 2: Broadcast
• OSPF Over Frame Relay Part 3 Point-to-Point
• OSPF over Frame-Relay – Part 4: Point-To-Multipoint
• OSPF over Frame-Relay – Part 5: Point-To-Multipoint Nonbroadcast
• OSPF Over Frame Relay Part 6 Troubleshooting

IP Routing

• Redistributing Connected Routes
• Peering With an Unknown Autonomous System
• Quick Look Into OSPF Database: Router LSA
• Quick Look Into OSPF Database: Network LSA
• Quick Look Into OSPF Database: Summary LSA
• Quick Look Into OSPF Database: External and ASBR-Summary LSA
• Quick Look Into OSPF Database: NSSA External LSA
• BGP Peering and Default Routes
• Remote Triggered Black Hole Filtering
• OSPF Split Areas
• OSPF and BGP Puzzle
• Follow-Up on OSPF and BGP Puzzle
• Multi-Homed BGP and Policy-Based Routing
• Understanding BGP Originator-ID and Cluster-ID

IPv6 Routing

• IPv6 in Carrier Networks
• Tunneling IPv6: 6to4 Tunnels
• Tunneling IPv6: ISATAP Tunnels
• Tunneling IPv6: Manual Tunnels
• OSPFv3 LSA Types – Part 1
• OSPFv3 LSA Types: Types 2001, 0008, and 2009 (Router, Link and Intra-Area-Prefix)- Part 2
• OSPFv3 LSA Types: Type 2002 (Network) – Part 3
• OSPFv3 LSA Types: Type 2003 (Inter-Area-Prefix) – Part 4
• OSPFv3 LSA Types: Type 4005 and 2004 (AS-External and Inter-Area-Router) – Part 5
• OSPFv3 LSA Types: Type 2007 (Type-7) – Part 6

IP and IPv6 Multicast

• Multicast “MPLS” VPNs
• Basic IPv6 Multicast
• Multicast Reverse Path Forwarding (RPF)
• Multicast RPF Failure: Recovery Using IGP Routing
• Multicast RPF Failure: Recovery Using Static RPF
• Multicast RPF Failure: Recovery Using BGP
• Understanding PIM Register Process
• PIM Register – There is a Source, but no Clients
• PIM Register – There are Clients, but no Source

MPLS, MPLS VPNs and VRF-Lite

• Next Hop in MPLS VPNs
• Old CCIE Myths: MPLS Traffic Engineering
• Introduction to Interprovider MPLS L3 VPNs
• VRF Route Leaking
• Frame Relay over MPLS with Local Termination
• MPLS L3VPN and Summarized Loopback Routes

Layer 2: Ethernet, Frame Relay, etc.

• Old CCIE Myths: Storm Control
• Old CCIE Myths: VTP
• Exploring the Frame Relay Cloud
• BPDU Filter and BPDU Guard
• Old CCIE Myths: VLAN 1
• Old CCIE Myths: Spanning-Tree Diameter

MPLS

• MPLS TE Load Sharing
• MPLS TE Bandwidth and Priority
• MPLS VPN VRF Selection Based on Source IP Address
• MPLS VPN over TE Tunnel Mesh Between PEs
• MPLS QoS ToS Reflection
• MPLS VPN Using the NAT Virtual Interface for Internet Access
• Basic MPLS
• MPLS QoS Uniform Mode
• MPLS and BGP-Free Core
• MPLS IP TTL Propagation
• MPLS L3 VPN

CCIE R&S Lab Free Technical Articles

• Private VLANs
• So Much Information, Part 1
• OSPF Router ID
• So Much Information, Part 2
• Setting Route Tags with BGP Table-Map
• Wildcard Masks
• L2 Interworking with Frame Relay to Ethernet & Some Troubleshooting
• Multicast VPN PIM SSM in the Core
• Network Address Translation (NAT)
• IOS Zoned-Based Firewall Overview for CCIE Routing and Switching 4.0 Candidates
• Route Redistribution - What Happened to My Reachability?
• OER / PFR Part 1: Set up
• BGP Outbound Route Filtering
• EIGRP for IPv6
• IPv6 - Why Does the Router Need to Know if AN Address is Anycast?
• BGP and Redistribution
• OSPF Type 4 LSA and Forward-Address, Part 1
• OSPF Type 4 LSA and Forward-Address, Part 2
• Frame Relay Switch Configuration
• BGP Route Reflection - Troubleshooting
• Explaining Etherchannel
• RP Announce Filter
• Introduction to OSPF Sham-Link
• EIGRP Metric and K-Values
• Spanning-Tree Direct VS Indirect Link Failures
• EIGRP ip default-network Command
• IP Event Dampening Using 7th Grade Math
• EIGRP Unequal Cost Load Balancing
• Introduction to Catalyst 3560 QoS
• Encryption for PPP Links Using MPPE
• OSPF Sham-Links
• Router IP Traffic Export (RITE)
• Etherchannel over Dot1q Tunnels
• Lab Diagrams
• IPv6 Unique-Local Addressing Explained
• Testing Source Specific Multicast
• Creating Custom EEM TCL Scripts
• GNS3 AND PHYSICAL SWITCHES - Breakout Switch
• CCIE R&S Lab Strategy - Speed and Accuracy with Configurations
• Am I Penalized for Over Configuration in the Lab?
• Building Error-Free Layer 2 EtherChannels
• CCIE R&S Strategy - Troubleshooting Section Tracker
• Configuring Stateless DHCP in IPv6
• Cisco's Autosecure
• DTP Review
• Lost in Translation - No Entry in Table
• Studying BGP for the CCIE R&S Exam
• Studying Multicast for the CCIE R&S Exam
• EIGRP and its Bandwidth Consumption
• Troubleshooting EIGRP Adjacencies
• Catalyst Switch QoS – AutoQoS
• Build a Strong Foundation for CCIE R&S
• CCIE R/S – Who Is Afraid of the Big Bad Routing Loop?
• The 802.1D Convergence Process
• The 802.1D Convergence Process-Port Selection
• Cisco's STP Kit
• Root Guard in Action
• BPDUFilter in Action
• Redistribution – DEBUG IP ROUTING in the CCIE Lab Exam
• Strict versus Loose Unicast Reverse Path Forwarding
• Is My RADIUS Configuration Working?
• DNS and Split DNS on IOS
• Cisco Live 2012 – CCIE R&S News
• Old CCIE Myths: Static Route to the Interface