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IWAN Wed: What’s more important? Uptime or Cost?

Screen Shot 2014-07-01 at 5.25.06 PM“Location, Location, Location” is what you need to keep in mind for real estate in the physical world.  But in today’s
enterprise environment where everything is virtual and many critical apps are in  the data center or cloud, the most important thing is connectivity.

So welcome to the era of connectivity, connectivity, connectivity!

As connectivity is so important, what can we do to ensure the uptime of the branch WAN connectivity without increasing costs?

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Are You Ready for Performance Routing?

I have been working for Cisco for over 15 years, much of that time as a Consulting Engineer for Routing and Switching. 

I understand strengths and weakness of routing, the value of a good hierarchical design…. But what’s worse than having an end-user having problems with one of his business application and being unable to provide an answer? Yes we have traceroute, ping and other fancy networking tools but nowadays we have to deal with applications and user experience. We have to move forward and take into account the performance of an application rather than just forwarding packets based on static cost metrics. It’s not just about connectivity anymore.

Therefore I’ve moved to the Application Visibility and Control (AVC) group in Engineering. It’s like jumping from standard L3 to advanced L4-L7 kind of routing.

I know what you may be thinking when you read these lines … yet another new acronym. We have the good old routing protocols, why should I care about this new AVC? Read More »

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Improve Application Performance via PfR

In the evolution of IP routing, Cisco performance routing (PfR) is a more advanced routing mechanism. Compared to traditional IP routing protocols like Static routing, RIP, OSPF, EIGRP or BGP that use static metrics to provide reachability information to the higher layers, PfR enhances traditional IP routing by selecting the best path based on live measurements and configured policies.

As we move from applications hitherto satisfied with simple reachability to applications whose performance is directly tied to network performance, traditional IP routing protocols fall short. They cannot guarantee complex application SLA requirements as these parameters are not included in the decision making process. This void can be filled by a routing mechanism that takes applications’ requirements while making routing decisions. PfR makes adaptive routing decisions based on criteria like latency, packet loss, jitter, traffic load and configured cost policies. This ability to configure flexibility into the routing decision process makes PfR closer to applications.

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