Brian McGahan teaches Quality of Service (QoS), helping you prepare for the new CCIE Certification exam. Read More

One of our most anticipated products of the year - INE's CCIE Service Provider v3.0 Advanced Technologies Class - is now complete!  The videos from class are in the final stages of post production and will be available for streaming and download access later this week.  Download access can be purchased here for $299.  Streaming access is available for All Access Pass subscribers for as low as $65/month!  AAP members can additionally upgrade to the download version for $149. Read More

This blog post reviews and compares two most common types of traffic contracts - single rate and dual-rate agreements and their respective implementations using single-rate and dual-rate (two-rate) policing. We are also going to briefly discuss effects of packet remarking on end-to-end throughput and finally look at some examples of IOS configuration. What is Traffic Contract Service-providers network topology typically follows core/aggregation model, where network core has meshed topology and... Read More

In this first of a series of blog posts regarding Catalyst QoS, we will exam the AutoQoS capabilities on the 3560 Catalyst devices. AutoQoS allows for the automation of QoS settings for the switch with an absolute minimum of configuration required from the engineer. In particular, the 3560 AutoQoS features automates the classification and congestion management configurations required in VoIP environments. You should note that the 3560 AutoQoS has much “catching up” to do when you compare this... Read More

Abstract This publication discusses the spectrum of problems associated with transporting Constant Bit Rate (CBR) circuits over packet networks, specifically focusing VoIP services. It provides guidance on practical calculation for voice bandwidth allocation in IP networks, including the maximum bandwidth proportion allocation and LLQ queue settings. Lastly, the publication discusses the benefits and drawbacks of transporting CBR flows over packet switched networks and demonstrates some... Read More

INE is happy to announce that we now have all 21 Modules of our new CCIE Voice Deep Dive completed --115 hours of recorded class-on-demand style video (no breaks or dead-air in the recordings - that's 115 hours of actual learning!)-- completed and ready for your consumption! As we mentioned in a previous post, The author and poet Maya Angelou said “Words mean more than what is set down on paper. It takes the human voice to infuse them with deeper meaning.”. Well that is certainly what we have... Read More

Try these questions on for size! Learn all this and much more in the new QoS class - woohoo! 1. Based on the following configuration, what traffic will be policed? class-map C_MUSIC match protocol kazaa2 match protocol napster ! class-map match-any C_WEB match protocol http match class-map C_MUSIC ! policy-map P_WEB class C_WEB police 64000 ! interface serial 0/0 service-policy output P_WEB A. All Kazaa version 2 traffic is policed B. All Napster traffic is policed C. All web traffic is policed... Read More

Try these questions on for size! Learn all this and much more in the new QoS class - woohoo! 1. Based on the following configuration, what traffic will be policed? class-map C_MUSIC match protocol kazaa2 match protocol napster ! class-map match-any C_WEB match protocol http match class-map C_MUSIC ! policy-map P_WEB class C_WEB police 64000 ! interface serial 0/0 service-policy output P_WEB A. All Kazaa version 2 traffic is policed B. All Napster traffic is policed C. All web traffic is policed... Read More

We know from the 5-Day QoS bootcamp that Differentiated Services is one of the three major overall approaches to providing Quality of Service in an enterprise. The other options are Integrated Services and Best Effort. When we studied Differentiated Services, we saw that the primary marking technology approach was the Differentiated Services Code Point (DSCP) concept. These are the high order 6 bits in the IP packet ToS Byte. But how can MPLS use these markings in order to provide QoS treatment... Read More

In this short blog post, we are going to give condensed overview of the four main flavors of Frame-Relay Traffic Shaping (FRTS). Historically, as IOS evolved with time, different methods have been introduced, having various level of feature support. Two main features, specific to Frame-Relay Traffic-Shaping are per-VC shaping and queueing and adaptive shaping in response to Frame-Rleay congestion notifications (e.g. BECNs). You'll see that not every flavor supports these two features. We begin... Read More