Is your network ready for the New Year? In order to be fully prepared, your business may need these technologies to move forward:

As is sometimes the case, the idea for this article originated with a student question I received during one of the Securing Networks with ASA Fundamentals classes I have taught this summer. The course material mentions a simple scenario whereby IP Telephony traffic is given priority out of an interface to satisfy the Quality of […]

There tends to be confusion on how Bandwidth (BW) versus Bandwidth Remaining is actually calculated, and which is best to use in defining bandwidth requirements within a CBWFQ system or LLQ. In order to clarify the differences, let’s look at a typical configuration which could easily explain how bandwidth is calculated; and then look what the […]

Entry number 13 of this series offered a challenging pop quiz on how to configure QoS on a Cisco router using Modular QoS Command Line Interface (MQC) queuing mechanisms. Here is the pop quiz question with the answer in the CLI output below. Author: Paul Stryer On the HQ WAN router, configure the appropriate MQC […]

Global Knowledge Course Director and Lab Topology Architect Joey DeWiele, a specialist in Unified Communications, defines QOS. [youtube=http://www.youtube.com/watch?v=HKWLrttpPOY]

The past 12 entries of this blog series have explored QoS theory and how to configure QoS on Cisco routers. By popular demand, I have created a pop quiz on how to configure QoS on a Cisco router using Modular QoS Command Line Interface (MQC) queuing mechanisms. Here is how the pop quiz will work. […]

Part 11 of this blog series looked at Class Based Weighted Fair Queuing. This blog will explore the next queue mechanism; Low Latency Queuing (LLQ). As seen in the previous section of this QoS series, CBWFQ provides user defined traffic classes allowing for more control and functionality than weighted Fair Queuing. CBWFQ uses matching criteria […]

Part 10 of this blog series looked at Weighted Fair Queuing, so now we move on to the next queue mechanism; Class Based Weighted Fair Queuing (CBWFQ). CBWFQ provides user defined traffic classes allowing for more control and functionality then weighted Fair Queuing. CBWFQ uses matching criteria obtained by Network Based Application Recognition (NBAR), or […]

Last time we looked at First-In First-Out queue management, in this blog we’ll explore the next queue mechanism on our list: Weighted Fair Queuing (WFQ). WFQ is a flow-based queuing algorithm used in Quality of Service (QoS) that does two things simultaneously: It schedules interactive traffic to the front of the queue to reduce response […]

In part 8 of this blog series congestion management and its four main queuing methods were explored. This post will look at the first of four queuing methods: First In First Out (FIFO) queuing. To refresh our memories, congestion can occur anywhere within a network, such as sections of the network that have speed mismatches, […]