Kerry CorderoKISS IT Design Principle - Human Error Prevention
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Routing & Switching

Routing & SwitchingSecurity

VLANs and Access Control

I’m writing this post because I’ve been in many environments where a VLAN is brought up as if it’s securing...
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CloudCodeData CenterLaptops & DesktopsLoad BalancingRouting & SwitchingSecurityServersVOIPWireless

Evaluating IT Network Costs: OpEx, CapEx, and TCO

Cost consideration is an essential aspect when designing and implementing network architecture. Here, we delve into the three primary components...
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Data CenterRouting & Switching

LLDP vs CDP

LLDP and CDP are both network discovery protocols, but they have some key differences: 1. Standardization and Vendor-Neutrality: LLDP is...
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Data CenterRouting & Switching

Cisco Optics-to-Device Compatibility Matrix

Cisco Optics-to-Device Compatibility Matrix...
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Routing & Switching

Cisco SmartNet 101

SNT SMARTnet Support 8x5xNBD SNTE SMARTnet Support 8x5x4 SNTP SMARTnet Support 24x7x4 S2P SMARTnet Support 24x7x2 CS Onsite SMARTnet Support...
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Routing & Switching

RFC5737 – IPv4 Address Blocks Reserved for Documentation

This post shows three IPv4 address blocks that are available for documentation purposes. Predefined address ranges for documentation and examples...
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Routing & Switching

EIGRP and OSPF Path Selection Manipulation

I’m hoping to post some examples in the near future but below is how you manipulate the traffic flow with...
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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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Data CenterRouting & Switching

Cisco Nexus Port-Side Exhaust vs Port-Side Intake

Port-side intake and port-side exhaust are terms used by Cisco, especially in their Nexus series of switches, to refer to...
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Routing & SwitchingServers

MTU 1500: Fragmentation after 1472 bytes “Packet needs to be fragmented but DF set”

Are you getting an error message that says, “Packet needs to be fragmented but DF set” or “Frag needed and...
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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 OSPF Packet Capture Palo Alto Palo Alto CLI PDF Planning Ports PowerShell python QOS snmp Splunk SSL Storage Structured Cabling TLS Troubleshooting Upgrade VMWare Zscaler
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