Kerry CorderoPractical Network Engineering Notes
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Data Center

Data CenterRouting & Switching

MTR Explained: Per-Hop Loss, Protocol Selection, and Bidirectional Testing

A throughput test tells you that a path is slow. It does not tell you where the problem is. mtr...
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Data CenterRouting & Switching

Cisco maximum-paths Explained: ECMP, CEF Hashing, and Real Traffic Distribution

The Cisco maximum-paths command determines how many eligible equal-cost routes a routing protocol may install for the same destination. It...
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Data CenterRouting & Switching

Cisco and AWS BGP Timers: Why Failover Takes 30 Seconds but Failback Takes 2 Seconds

AWS Transit Gateway Connect uses a default BGP keepalive interval of 10 seconds and a hold timer of 30 seconds....
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Data CenterLaptops & DesktopsRouting & SwitchingServers

Spanning Tree Master Class for Cisco Enterprise Networks

The Definitive Guide for Cisco Enterprise Networks (IOS-XE & NX-OS) This guide covers Spanning Tree Protocol from first principles through...
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Data Center

Data Center Decommissioning Checklist (Practical, Network-Architect Friendly)

Data center decommissioning is more than powering off servers and rolling racks out the door. A decom touches applications, routing,...
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Data CenterRouting & Switching

Cisco BGP Multipath Relax Explained: When Different AS Paths Can Qualify for ECMP

Cisco BGP normally selects one best path for each prefix. Even when multiple routes have the same local preference, AS-path...
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Data CenterSecurity

Gigamon Network TAPs Masterclass: From Fiber to Full Packet Capture

A mature enterprise packet analysis architecture does not wait for an incident before it begins collecting evidence. By combining network...
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Data CenterLaptops & DesktopsServers

NTP Master Class The Definitive Guide for Cisco Enterprise Networks (IOS-XE, NX-OS & ISE)

This guide covers Network Time Protocol from fundamentals through enterprise time architecture: stratum hierarchy design, GPS/GNSS time sources, authenticated and...
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AICloudCodeData CenterLaptops & DesktopsLoad BalancingRouting & SwitchingSecurityServersVOIPWireless

A Network Architect’s Guide to Technical Debt

Technical Debt in the Age of AI In infrastructure and networking, “technical debt” is often treated like a moral issue:...
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Data CenterRouting & Switching

Why Splunk Is Not a Network Monitoring Tool And Why That Matters

The Problem Engineers Keep Running Into If you have spent any meaningful time operating an enterprise network, you have probably...
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  • Home
  • About
  • Disclaimer
  • Guides and Slides
    • AWS Well-Architected Framework
    • Facebook – Running BGP in the Data Center at Scale
    • Microsoft – Experiences with BGP in Large Scale Data Centers
    • Palo Alto PCNSE Study Guide
  • Tools
    • Car Calculator
    • RouteAgg
    • IP Calculator
    • VSLM
  • Links
  • Contact

Categories

  • AI
  • Business Management
  • Cloud
  • Code
  • Data Center
  • Laptops & Desktops
  • Load Balancing
  • Routing & Switching
  • Security
  • Servers
  • Uncategorized
  • VOIP
  • Wireless

Tags

Active Directory (AD) AWS Best Practices BGP Certificates Cisco Cisco ACI Cisco ASA Cisco ASR Cisco Catalyst Cisco CLI Cisco ISE Cisco Nexus Cisco Stack DDOS Design DNS EIGRP F5 HTTP(S) IP Addressing and Subnetting Microsoft IIS Microsoft SQL Microsoft Windows Netflow OSPF Packet Capture Palo Alto Palo Alto CLI PDF Planning Ports PowerShell python QOS snmp Spanning-Tree Splunk SSL Structured Cabling TLS Troubleshooting Upgrade VMWare Zscaler
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