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Routing & Switching

Cisco Nexus CLI – Find Fiber Length for Transceiver Used

Cisco can tell you the length of fiber compatible with the Transceiver you are using. sh int e1/1 transceiver Ethernet1/1...
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Data CenterRouting & Switching

Cisco – Handling Critical Device Configurations When you Don’t have an OOB Solution, Reload Command

In network engineering, configuring a production device can be a high-stakes operation. One wrong command could cause a cascade of...
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Data CenterRouting & Switching

Cisco – Troubleshooting with Show Tech-Support and Tac-Pac on NX-OS

Cisco NX-OS, the network operating system running on Nexus series switches, offers powerful troubleshooting tools to network administrators. Among these...
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Routing & Switching

The Power of “No”: Understanding the “no bgp default ipv4-unicast” Command in BGP Configuration

When it comes to Border Gateway Protocol (BGP), there’s a myriad of configuration options available to network engineers. One command...
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Routing & Switching

Cisco Netflow v9

NetFlow is a network protocol developed by Cisco for collecting IP traffic information and monitoring network traffic. By analyzing flow...
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Routing & Switching

Cisco – How to Speed Up Traceroute on Cisco IOS and IOS-XE Devices “numeric”

Traceroute is a convenient network diagnostic tool for tracking the pathway taken by a packet on an IP network from...
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Routing & Switching

Cisco  – Manual Tracing of Layer 2 Path on Cisco Nexus Switches

1. Identify the issue: Do your best to get all the data possible to help troubleshoot the issue. 2. Determine...
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Data CenterRouting & Switching

Troubleshooting L2 Forwarding Issues on Cisco Nexus Switches

Layer 2 forwarding is a critical function in any switch or router. When troubleshooting L2 connectivity issues, the MAC address...
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Routing & Switching

BPDU Filter vs BPDU Guard

Both `BPDU Filter` and `BPDU Guard` are features of the Spanning Tree Protocol (STP) used to control the behavior of...
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CloudRouting & Switching

AWS “Allowed Prefixes” BGP Routing with More Specific Route

Scenario: We have a subnet configured in the “Allowed prefixes,” a /16. You can’t change the size of a subnet...
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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

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

Tags

Active Directory (AD) API 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 Logging macOS Microsoft IIS Microsoft SQL Microsoft Windows OSPF Packet Capture Palo Alto Palo Alto CLI PDF Planning Ports PowerShell python QOS Splunk SSL Structured Cabling TLS Troubleshooting Upgrade VMWare
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