Browsing Tag
cisco
82 posts
How to Back Up and Restore Cisco Device Configurations: Complete Guide with Best Practices
Every network engineer has a story about the config that wasn’t backed up when it needed to be…
How to Perform Software Upgrades on Cisco Devices: IOS and Firmware Update Guide
Software upgrades on production network gear are one of those tasks where the difference between “routine maintenance” and…
How to Troubleshoot Firewall Policies on Cisco ASA Firewalls: Step-by-Step Guide
“Traffic is being blocked and nobody knows why” is one of the most common tickets a network or…
How to Troubleshoot VPN Issues on Cisco ASA Firewalls: Common Problems and Solutions
If you have spent any real time managing Cisco ASA firewalls, you already know that VPN troubleshooting is…
How to Troubleshoot WAN Connectivity Problems on Cisco Routers: Complete Diagnostic Guide
WAN outages are the kind of problem that get an engineer paged at 2 a.m., and I have…
How to Troubleshoot Switching Issues on Cisco Switches: VLAN, STP, and Port Problems
Switching problems have a reputation for being “simple” compared to routing or VPN issues, and in some ways…
How to Troubleshoot Routing Issues on Cisco Routers: OSPF, EIGRP, and BGP Diagnostics
Routing protocol troubleshooting is where I feel like a real network engineer earns their keep. Anyone can configure…
How to Generate and Analyze Packet Captures on Cisco Devices for Network Troubleshooting
There is a point in almost every difficult troubleshooting case where show commands stop being enough and I…
How to Monitor Bandwidth Usage on Cisco Devices: NetFlow, SNMP, and CLI Tools
“The network is slow” is probably the single most common complaint I get, and it is also one…
How to Configure IPv6 Tunneling on Cisco Routers: GRE, 6to4, and Manual Tunnels Explained
IPv6 tunneling is one of those topics that comes up far more often in real networks than people…