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Troubleshooting

Data CenterRouting & Switching

Cisco Nexus Show Commands for High CPU Usage

I ran these on our Nexus 7K switches....
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Routing & Switching

Cisco Router Viewing Crash Files

Contents of the Crashinfo File The crashinfo file contains this information: *limited error message (log) and command history *description of...
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Code

Common HTTP Response Codes

Laptops & DesktopsSecurityServers

Curl – Test TLS and HTTP versions

To test TLS versions and HTTP versions using CURL, you can specify the desired TLS and HTTP versions using the...
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Laptops & DesktopsSecurityServers

Data Flow – HTTPS Traffic and Cipher Suites

Here’s a step-by-step breakdown of the data flow: DNS Resolution: The user enters “https://cordero.me” into their browser’s address bar. The...
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Routing & Switching

Cisco Router Fiber Optic Levels

Below is a way to check the Tx/Rx Optical power levels on a Cisco router. I have a post on...
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Routing & Switching

Cisco Troubleshooting Interface Issues

In my case I was troubleshooting an interface that had to be 100Mb. But these commands can be used on...
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CloudCodeData CenterLaptops & DesktopsLoad BalancingRouting & SwitchingSecurityServersVOIPWireless

Common Ports

Laptops & DesktopsRouting & SwitchingSecurityServers

Data Flow – CURL and HTTPS

Let’s go through the steps and data flow when using `curl` to make an HTTPS request and check for an...
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Routing & SwitchingSecurity

Data Flow – TLS

Transport Layer Security (TLS) is a protocol designed to provide secure communications over a computer network. Below is a simplified...
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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
  • IP Calculator
  • 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 Azure 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 Splunk SSL Structured Cabling TLS Troubleshooting Upgrade VMWare Zscaler
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