The five nines (99.999% availability of a service) is the holy grail of many Chief Information Officers (CIO). To reach this goal, the average monthly downtime should be less than 25 seconds, which is... more
A few years ago, the traditional wisdom was that you could not do load balancing in networks using Border Gateway Protocol (BGP) as their core routing protocol. The technology, actually its implementa... more
Selecting the right IP routing protocol is one of the most important decisions in the network design phase. But even after careful consideration of all facts known to you at that time, you might get i... more
The introduction of real-time mission-critical applications (like voice-over-IP) into data networks has prompted many network designers to tune their routing protocols for faster convergence. The resu... more
The February IP Corner article Small Site Multi-Homing described how to implement the small site multi-homing with existing Cisco technologies in the existing ISP environment. That article has generat... more
The cost optimization in the IT industry is affecting all segments of network design and implementation. For example, some IP services like DHCP and DNS, which were previously distributed throughout t... more
Have you ever wanted to fine-tune the IOS show commands to provide you with the exact information you need instead of having to dig through long screens full of data you are not interested in to find ... more
Enhanced Interior Gateway Routing Protocol (EIGRP), Cisco’s proprietary yet hugely successful and widely deployed routing protocol is known to behave disappointingly in inadequately designed networks.... more
Have you ever faced a situation where you have badly misconfigured your router and had to roll back the configuration to a previous known state? Assuming that the working configuration was still saved... more
High-availability seems a de-facto requirement of enterprise networks, even more so today as the network managers have to migrate from traditional highly robust technologies to MPLS/VPN- or Internet-b... more