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Routing & Switching

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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Routing & Switching

BFD and BGP Graceful Restart on Cisco IOS XE: Should You Run Both?

BFD and BGP Graceful Restart are frequently described as features that should never be enabled together. That warning came from...
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Routing & Switching

BGP Master Class for Cisco Enterprise Networks

The Definitive Guide for Cisco Enterprise Networks (IOS-XE & NX-OS) This guide covers Border Gateway Protocol from first principles through...
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Routing & Switching

Understanding VRFs and Front-Door VRFs in a B2B Cisco VPN Design

Understanding VRFs and Front-Door VRFs in a B2B Cisco VPN Design In a dedicated B2B router design, the device is...
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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 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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Routing & Switching

Why BGP Failover Takes 30+ Seconds but Failback Takes 2

In many routed-network tests, removing the preferred path produces a longer traffic interruption than restoring it. The difference comes from...
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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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Routing & SwitchingSecurity

Certificate Export Formats Explained for Cisco ISE, F5, Palo Alto, and Cisco Network Devices

Certificate Export Formats Explained (and When to Use Them) Certificate management gets messy fast when different platforms expect different file...
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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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