Configure VTI Tunnels on Cisco Routers
This post covers how to configure VTI tunnels with IKEv2 and IPsec protection on Cisco IOS routers using the global and a user-created VRF. read more →
Alirio Zavarce
STP Path Cost Method (short vs long)
In this post, you’re going to learn about the short and long STP Path Cost Methods, and how they differ. read more →
Duplicate OSPF Router Links on Nexus 7000
Shut down an OSPF interface and the IP subnet still gets advertised in OSPF? How is that possible? Check out this case. read more →
BGP Default Routing
This post elaborates on BGP Default Routing and three ways a Cisco router/switch generates a default route to its neighbors. read more →
Cisco Catalyst 9500 SVL Upgrade
In this post, I’ll show you how to upgrade the SVL of a Cisco Cat9500 StackWise switch pair from two 25G to 100G links with minimum downtime. read more →
Reporting Push Interval: 0 (no reporting)
You configured Smart Licensing on your router but see the Reporting push interval: 0 (no reporting) in show license status. What’s up? read more →
BGP Configuration (Beginners Guide)
Learn CLI commands to configure external and internal BGP peering, authentication, timers, prefix filtering, and more. read more →
BGP: The Ultimate Guide [2024]
Learn how BGP works and how it operates, what an Autonomous System is, BGP’s decision process, and much more. read more →
Activate DNA Advantage License
This post quickly shows you how to activate the DNA Advantage license on your Cisco Catalyst 8300 router. read more →
Configure Cisco Smart Licensing
In this post, I provide the CLI configuration scripts I use to configure Cisco Smart Licensing on IOS routers & switches. read more →