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Bridging & Switching [14] ↑

• Option AB - Inter-AS MPLS VPN - The whole story (5) - Updated Dec 2008
• System MTU explained
• What is: BPDU filter?
• How-to: Configure Private VLANs
• How-to: Configure Spanning Tree Protocol Part3
• How-to: Configure Spanning tree protocol Part2
• How-to: Configure spanning tree protocol (STP) Part1
• Spanning Tree the problem and the solution
• Etherchannel load balancing case study
• What is: extended VLAN range?
• How-to: Configure trunk VLAN allowed list?
• How-to: Configure trunking
• VTP in brief
• Native VLAN

Bury the hatchet [27] ↑

• The endless story of OSPF vs IS-IS - Part 4 "The Inside Out"
• The endless story of OSPF vs IS-IS - Part 3 "Packets and Database"
• The endless story of OSPF vs IS-IS - Part 2 "The history"
• The endless story of OSPF vs IS-IS
• MTU and ping size confusion
• VRF Selection Based on Source IP Addresses
• CEF and load sharing
• IS-IS and fast convergence ongoing tricks
• LDP neighbor discovery, session establishment and maintenance
• BGP performance tuning - Convergence, Stability, Scalability and NSF (Part 3)
• Draft Martini, Draft Kompella and L2VPN services
• Carrier Supporting Carrier - The whole story (2)
• Carrier Supporting Carrier - The whole story (1)
• Inter-AS MPLS VPN - The whole story - Updated Dec 2008
• BGP performance tuning - Convergence, Stability, Scalability and NSF (Part 2)
• BGP performance tuning - Convergence, Stability, Scalability and NSF (Part 1)
• Cisco and Nonstop Forwarding
• Option AB - Inter-AS MPLS VPN - The whole story (5) - Updated Dec 2008
• Option 3 (10C): Multi-Hop MP-eBGP Between RR and eBGP Between ASBRs - Inter-AS MPLS VPN - The whole story (4) - Updated Dec 2008
• Option 2 (10B): ASBR-to-ASBR / MP-eBGP for VPNv4 - Inter-AS MPLS VPN - The whole story (3) - Updated Dec 2008
• Option 1(10A): Back-to-Back VRF - Inter-AS MPLS VPN - The whole story (2) - Updated Dec 2008
• Inter-AS MPLS VPN - The whole story (1) - Updated Dec 2008
• BGP helicopter view
• Prefix-list dilemma
• OSPF DR/BDR Election Myth
• OSPF RID Story
• The ip route-cache command - Bury the hatchet series

Case Studies [5] ↑

• Troubleshoot#1: Correlation vs Causation
• Before you buy a Console Server
• Out of Band Management Networks - Console Servers
• What you need to know about ADSL (broadband Networks #1)
• Etherchannel load balancing case study

CISCO HOW-TO [21] ↑

• How to: use IS-IS overload bit
• VRF Lite
• BGP Route Reflector Basics
• distribute-list gateway with OSPF
• BGP Default-Originate insights
• How-to: Avoid DNS lookup when mistyping a command
• How-to: Configure Private VLANs
• How-to: Configure Spanning Tree Protocol Part3
• How-to: Configure Spanning tree protocol Part2
• How-to: Configure spanning tree protocol (STP) Part1
• How-to:Configure BGP aggregation Part2
• How-to: Configure trunk VLAN allowed list?
• How-to:Configure PPP authentication Part2 (CHAP)
• How-to: Configure PPP authentication Part1 (PAP)
• PPP in brief
• How-TO: Configure DHCP on a CISCO router
• How-to: Configure Frame-relay Switching
• Limiting non-business related applications during work hours
• How-to: Configure trunking
• How to Configure Frame-relay interfaces
• How-to:Configure BGP aggregation Part1

Hacks [1] ↑

• Cheat: your portable memory bank

Industry [6] ↑

• CCIE SPv4.1 Blueprint Resources
• Software-Defined Networks .. A Primer
• How to become a Network Engineer?
• What can you learn in 5 minutes a day !
• 7 Actions to get your network ready for IPv6
• The Ongoing Internet Core Routing Race

IP Services [3] ↑

• ARP Caching and Timeout
• How-to: Avoid DNS lookup when mistyping a command
• How-TO: Configure DHCP on a CISCO router

IPv6 [6] ↑

• What is 6PE?
• IPv6 Tutorial
• IPv6 Tutorial: IPv6 Unicast Address
• IPv6 Tutorial: IPv6 Addressing #1
• IPv6 Tutorial: The overview
• 7 Actions to get your network ready for IPv6

MPLS [28] ↑

• What is 6PE?
• MPLS Label Distribution: LDP Part3
• MPLS Label Distribution - LDP Part2
• MPLS Label Distribution - LDP Part1
• The Role of BGP in MPLS networks
• MPLS Label Operations
• What is MPLS?
• Choosing PE-CE Routing protocol
• VRF Selection Based on Source IP Addresses
• IS-IS and fast convergence ongoing tricks
• VRF Lite
• MPLS VPN security threats
• LDP neighbor discovery, session establishment and maintenance
• What is LDP extended discovery?
• Draft Martini, Draft Kompella and L2VPN services
• MPLS Special Labels
• Static Routes Label Binding
• Carrier Supporting Carrier - The whole story (2)
• Carrier Supporting Carrier - The whole story (1)
• Inter-AS MPLS VPN - The whole story - Updated Dec 2008
• MPLS control and forwarding planes
• Option AB - Inter-AS MPLS VPN - The whole story (5) - Updated Dec 2008
• Option 3 (10C): Multi-Hop MP-eBGP Between RR and eBGP Between ASBRs - Inter-AS MPLS VPN - The whole story (4) - Updated Dec 2008
• Option 2 (10B): ASBR-to-ASBR / MP-eBGP for VPNv4 - Inter-AS MPLS VPN - The whole story (3) - Updated Dec 2008
• Option 1(10A): Back-to-Back VRF - Inter-AS MPLS VPN - The whole story (2) - Updated Dec 2008
• L2VPN Pseudowire Redundancy (MPLS AToM Redundancy)
• Inter-AS MPLS VPN - The whole story (1) - Updated Dec 2008
• What is: AToM Control-Word?

NetSpresso [1] ↑

• JUNOS Disable vs Deactivate interfaces

Network Design [28] ↑

• L3 fabric DC -The underlay Network (BGP) -part2
• L3 fabric DC -The underlay Network -Part1
• Classic DC and M-LAG
• BGP in the Data Center
• What is 6PE?
• Making Sense of Broadband networks: PPPoE Explained
• Making sense of Broadband networks – VLAN Model
• Making sense of Broadband networks - Part 1
• 7 Actions to get your network ready for IPv6
• How to: use IS-IS overload bit
• Before you buy a Console Server
• Out of Band Management Networks - Console Servers
• The endless story of OSPF vs IS-IS - Part 4 "The Inside Out"
• The endless story of OSPF vs IS-IS - Part 3 "Packets and Database"
• The endless story of OSPF vs IS-IS - Part 2 "The history"
• The endless story of OSPF vs IS-IS
• How to select your core routers?
• CRS-1 Hardware Overview
• Carrier Routing System (CRS-1) Overview
• BGP table analysis and statistics
• IS-IS and fast convergence ongoing tricks
• Link state protocols and Areas concept
• Fast Convergence: IS-IS performance tuning
• BGP performance tuning - Convergence, Stability, Scalability and NSF (Part 1)
• Fast Convergence: Partial SPF calculation
• Fast convergence overview
• Network Design Evaluation
• Routers' Operating systems

Off Topic [13] ↑

• What can you learn in 5 minutes a day !
• Few ways scripting can keep you sane
• The Forgotten skill of technical writing
• Life Follows a Plan, but the Plan is not Yours !
• Measuring your SUCCESS
• It is time to make a CHANGE
• Cisco Profit up 79% Stock down 8%
• Simple Ideas Create Great Realities
• Eman in Cairo
• Interview with Emmanuel Conde
• WISB Free Telnet Tool
• I woke up in the morning and the internet was not there
• Real job description for a Network Architect

Packet Switching [3] ↑

• Per packet vs Per destination load balancing
• Load balancing in a nutshell
• The ip route-cache command - Bury the hatchet series

Platforms [5] ↑

• How to select your core routers?
• CRS-1 Hardware Overview
• Carrier Routing System (CRS-1) Overview
• Routers' Operating systems
• Routers' Memory types

QOS [5] ↑

• Frame-relay Discard Eligibility Bit (DE)
• Frame-relay traffic shaping using MQC
• CAR - Rate limit examples
• Limiting non-business related applications during work hours
• PBR as a QOS tool

Routing [14] ↑

• The endless story of OSPF vs IS-IS - Part 4 "The Inside Out"
• The endless story of OSPF vs IS-IS - Part 3 "Packets and Database"
• The endless story of OSPF vs IS-IS - Part 2 "The history"
• The endless story of OSPF vs IS-IS
• CEF and load sharing
• Static routes and next hops
• BGP performance tuning - Convergence, Stability, Scalability and NSF (Part 1)
• Option AB - Inter-AS MPLS VPN - The whole story (5) - Updated Dec 2008
• Connected Routes Advertisment
• How routers select best routes ?
• Automatic summarization in RIP and EIGRP
• OSPF cost calculation pitfall with high bandwidth interfaces
• How-to:Configure BGP aggregation Part1
• BGP fast-external-fallover

  BGP [30] ↑

  • L3 fabric DC -The underlay Network (BGP) -part2
  • L3 fabric DC -The underlay Network -Part1
  • Classic DC and M-LAG
  • BGP in the Data Center
  • What is 6PE?
  • BGP Weight Attribute
  • BGP Attributes List
  • BGP Attributes: Local Preference Attribute
  • BGP Attributes: Atomic Aggregate Atribute
  • BGP Attribute Types and Flags
  • The Role of BGP in MPLS networks
  • BGP Route Refresh Capability
  • BGP 4-Byte ASN
  • BGP Security
  • Choosing PE-CE Routing protocol
  • BGP Routing Information Base (RIB)
  • BGP table analysis and statistics
  • BGP Next-hop address tracking
  • Why BGP?
  • BGP Route Reflector Basics
  • BGP performance tuning - Convergence, Stability, Scalability and NSF (Part 3)
  • BGP 4-byte AS numbers
  • BGP performance tuning - Convergence, Stability, Scalability and NSF (Part 2)
  • BGP performance tuning - Convergence, Stability, Scalability and NSF (Part 1)
  • BGP Default-Originate insights
  • Understanding BGP communities
  • BGP helicopter view
  • How-to:Configure BGP aggregation Part2
  • How-to:Configure BGP aggregation Part1
  • BGP fast-external-fallover

  IGP [10] ↑

  • The endless story of OSPF vs IS-IS - Part 4 "The Inside Out"
  • The endless story of OSPF vs IS-IS - Part 3 "Packets and Database"
  • The endless story of OSPF vs IS-IS - Part 2 "The history"
  • The endless story of OSPF vs IS-IS
  • Fast Convergence: Partial SPF calculation
  • Fast convergence overview
  • Connected Routes Advertisment
  • How OSPF selects best routes
  • Passive-interface command behavior in RIP, EIGRP & OSPF
  • Automatic summarization in RIP and EIGRP

    EIGRP [4] ↑

    • EIGRP metric manipulation
    • EIGRP timers (hello, hold and active)
    • Passive-interface command behavior in RIP, EIGRP & OSPF
    • Automatic summarization in RIP and EIGRP

    ISIS [15] ↑

    • How to: use IS-IS overload bit
    • The endless story of OSPF vs IS-IS - Part 4 "The Inside Out"
    • The endless story of OSPF vs IS-IS - Part 3 "Packets and Database"
    • The endless story of OSPF vs IS-IS - Part 2 "The history"
    • IS-IS DIS in Practice
    • IS-IS Neighbor Discovery
    • The endless story of OSPF vs IS-IS
    • IS-IS MTU Mismatch
    • IS-IS and fast convergence ongoing tricks
    • OSPF & IS-IS Router ID
    • Link state protocols and Areas concept
    • Fast Convergence: IS-IS performance tuning
    • IS-IS explained Part2 (Routing Levels)
    • What is Integrated ISIS?
    • IS-IS explained (Part1)

    OSPF [13] ↑

    • The endless story of OSPF vs IS-IS - Part 4 "The Inside Out"
    • The endless story of OSPF vs IS-IS - Part 3 "Packets and Database"
    • The endless story of OSPF vs IS-IS - Part 2 "The history"
    • The endless story of OSPF vs IS-IS
    • OSPF & IS-IS Router ID
    • Link state protocols and Areas concept
    • OSPF Virtual-links vs GRE tunnels
    • distribute-list gateway with OSPF
    • OSPF DR/BDR Election Myth
    • OSPF RID Story
    • How OSPF selects best routes
    • Passive-interface command behavior in RIP, EIGRP & OSPF
    • OSPF cost calculation pitfall with high bandwidth interfaces

    RIP [3] ↑

    • How-to:Configure RIP route summarization
    • Passive-interface command behavior in RIP, EIGRP & OSPF
    • Automatic summarization in RIP and EIGRP

Security [4] ↑

• Black hole filtering
• MPLS VPN security threats
• Unicast Reverse Path Forwarding
• Limiting non-business related applications during work hours

Software [1] ↑

• Cheat: your portable memory bank

TCP/IP [11] ↑

• TCP Protocol: Slow Start
• TCP Protocol: Flow Control
• TCP Protocol: TCP 3-way handshaking #2
• TCP Protocol: Three-way Handshake
• TCP Protocol: The Overview - Part1
• Understand MTU and MRU - The Full Story
• PPPoE MTU Explained
• What is MTU?
• Private IP address ranges
• Jumbo Frames
• ARP Caching and Timeout

Tools [2] ↑

• text2pcap - How to convert ASCII packet dumps to .pcap files?
• DHCP client testing tool

Troubleshooting [2] ↑

• Troubleshoot#2: Core Dumps for Network Engineers
• Troubleshoot#1: Correlation vs Causation

WAN technologies [4] ↑

• Static routes and next hops
• What is: IP unnumbered?
• How-to: Configure Frame-relay Switching
• How to Configure Frame-relay interfaces

  Frame-Relay [4] ↑

  • Frame-relay Discard Eligibility Bit (DE)
  • Frame-relay traffic shaping using MQC
  • How-to: Configure Frame-relay Switching
  • How to Configure Frame-relay interfaces

  PPP [6] ↑

  • Making Sense of Broadband networks: PPPoE Explained
  • PPPoE MTU Explained
  • Making sense of Broadband networks - Part 1
  • How-to:Configure PPP authentication Part2 (CHAP)
  • How-to: Configure PPP authentication Part1 (PAP)
  • PPP in brief

What Is ? [13] ↑

• Software-Defined Networks .. A Primer
• Making Sense of Broadband networks: PPPoE Explained
• What is MTU?
• Private IP address ranges
• IPv6 Tutorial: The overview
• What is MPLS?
• What is LDP extended discovery?
• What is Integrated ISIS?
• What is: a voice VLAN port?
• What is: BPDU filter?
• What is: extended VLAN range?
• What is: IP unnumbered?
• What is a virtual template/access interface?