How Many Cisco 9300 Switches Can Be Stacked?

Cisco Catalyst 9300 Series switches represent the enterprise standard for campus access and collapsed core networking. A core feature of this platform is Cisco StackWise technology, which allows multiple standalone switches to operate as a single logical entity with a unified control, management, and data plane. Stacking reduces management overhead, aggregates switching throughput, and provides... » read more

How to Change Config Register on Cisco Router

The configuration register on a Cisco router is a 16-bit hardware register stored in non-volatile memory (NVRAM) that directly governs how the device initializes, loads its operating system, and handles administrative console access. Whether performing standard maintenance, troubleshooting boot loops, adjusting console baud rates, or executing a password recovery procedure after administrative lockouts, understanding how... » read more

Cómo Funcionan Cisco ISE y TrustSec

La segmentación de redes corporativas ha dejado de ser una tarea viable mediante direccionamiento IP estático y listas de control de acceso convencionales. En entornos de trabajo híbridos, nubes distribuidas e infraestructuras con miles de dispositivos IoT, vincular la seguridad a la topología física o lógica genera cuellos de botella operativos y una superficie de... » read more

Could Not Resolve Cisco CAPWAP Controller

When a Cisco Lightweight Access Point (AP) boots up, its primary objective is to locate and establish an encrypted tunnel with a Wireless LAN Controller (WLC). When that process breaks down, network administrators are typically greeted on the AP console by a persistent, looping error message: Could not resolve Cisco CAPWAP controller or Failed to... » read more

Can’t Uninstall Cisco AnyConnect

Attempting to remove Cisco AnyConnect Secure Mobility Client (or its modern successor, Cisco Secure Client) frequently leads to unexpected roadblocks. Users often find themselves facing greyed-out “Uninstall” buttons, permission errors, sudden rollbacks, or installer errors such as Error 1721. Because AnyConnect integrates deeply into operating system network stacks, installs multiple dependent sub-modules, and binds virtual... » read more

Can’t Connect to Cisco AnyConnect VPN

Few technical interruptions disrupt a workday faster than being locked out of enterprise resources because Cisco AnyConnect (now branded as Cisco Secure Client) refuses to establish a tunnel. Because AnyConnect relies on a layered stack—spanning local virtual network adapters, operating system services, SSL/TLS certificate chains, and ISP-level routing—failures can manifest at several distinct points. A... » read more

Can You Take Cisco Exams Online?

Yes, you can take almost all Cisco certification exams online from the comfort of your home or office. Through Cisco’s partnership with Pearson VUE and its remote proctoring platform, OnVUE, candidates worldwide can complete written certification exams without traveling to a physical testing facility. While remote testing offers unmatched convenience, it introduces stringent rules regarding... » read more

Where to Sell Cisco Equipment

Decommissioning enterprise networking hardware is a routine milestone in any infrastructure lifecycle, but retired Cisco routers, switches, security appliances, and transceivers rarely belong in an e-waste bin. Even after several years in production, secondary market demand for reliable enterprise gear remains strong. Whether your goal is recouping capital to offset a migration, clearing out excess... » read more

What Will a Cisco LAN Switch Do?

A Cisco Local Area Network (LAN) switch serves as the central interconnectivity hub for modern wired network environments. At its foundation, it connects endpoint devices—such as workstations, wireless access points, IP phones, printers, and servers—within a localized physical facility or campus. Rather than broadcasting data indiscriminately across all connected links, a Cisco switch inspects incoming... » read more