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Routing & Switching

Understanding and Troubleshooting UDP Session Timeouts in Firewalls

When dealing with network traffic, understanding the behavior of different protocols is vital. UDP, or User Datagram Protocol, is a...
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Laptops & DesktopsSecurity

Packet Capture – Microsoft Windows Built-in Packet Capture PKTMON (Older NETSH TRACE)

Yes, both Windows 10 and 11 include a built-in command-line tool for packet capturing named “Packet Monitor” or pktmon. It...
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Laptops & DesktopsServers

Windows Display Protocol and Ethernet Statistics

There are 4 commands that are useful: netstat -s netstat -e netsh interface ipv4 show ipstats netsh interface ipv4 show...
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Laptops & DesktopsServers

Ping Sweep on a Windows Device

Command Prompt: for /L %i in (1,1,254) do @ping -n 1 4.2.2.%i | find "Reply" Powershell: 1..254 | % {...
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Routing & Switching

Cisco CLI Cable Testing Command

Cisco has a command that can run TDR tests on an interface. A TDR (time-domain reflectometer) is an electronic instrument...
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Routing & Switching

STP – Tracking Down Topology Changes and the Importance of Setting the Root Bridge

Finding Spanning Tree Protocol (STP) topology changes in a network is not always straightforward. However, it is critical to identify...
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Security

Palo Alto – Perform FIB Lookup for a Specific Destination

This command is a good one that I use often. There are time I want to see if a route...
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Routing & Switching

IP SLA

Routing & Switching

STP – Finding Who’s Sending BPDUs on the Network

Knowing which devices are sending BPDU packets on the network when troubleshooting spanning tree issues can be helpful. This allows...
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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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  • 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 macOS Microsoft IIS Microsoft SQL Microsoft Windows OSPF Packet Capture Palo Alto Palo Alto CLI PDF Planning Ports PowerShell python QOS Splunk SSL Storage Structured Cabling TLS Troubleshooting Upgrade VMWare Zscaler
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