Articles by tag "Network Engineering"

1. Five OSPF Area Types
   leo peng

   738
   There are five types of OSPF areas: Backbone area (area 0), Standard area, Stub area, Totally stubby area, and No so stubby area (NSSA). Let's introduce one by one. 1.Backbone Area Backbone area also called the backbone area, is actually area 0. According to the OSPF design principle, area 0 ...
2. The Simplest BGP Configuration
   leo peng

   71
   What is BGP? Autonomous system refers to the entire network of all IP networks and routers under the jurisdiction of one (sometimes multiple) entity. They implement common routing policies for the Internet. BGP is different from Interior Gateway Protocol (IGP) such as RIP and OSPF. It belongs ...
3. DMVPN Phase 3 Configuration Guide: Architecture, Migration Steps, and Best Practices
   Selene Gong

   24
   Dynamic Multipoint VPN (DMVPN) remains one of the most widely deployed WAN technologies for large, distributed networks that rely on Cisco routers. DMVPN Phase 3 introduced several enhancements—particularly around spoke-to-spoke forwarding—that improve scalability, efficiency, and latency ...
4. JunOS Upgrade Guide: Best Practices, Execution, and Risk Mitigation
   Selene Gong

   19
   For network engineers and systems administrators, upgrading Junos OS is a critical procedure that requires meticulous planning to ensure business continuity. Whether managing Juniper switches, routers, or SRX firewalls, staying current with software versions enables deployment of new features, ...
5. Anatomy of a Cisco Catalyst 9300 Upgrade Failure: Engineering Case Study
   Selene Gong

   19
   Upgrading enterprise access switches like the Cisco Catalyst 9300 running Cisco IOS XE is a routine yet high-stakes task. In complex campus environments, failures are rarely caused by the software image itself; they are typically triggered by environmental gaps, configuration drift, or ...