Some QoS Guidelines

When I started taking classes from the Cisco CCNA Discover books years ago, I remember for the first part of the book it talked about QoS and the theory behind it. To me QoS was a very interesting but after a chapter or two we never mentioned it again or really knew how to configure it. It seemed like it disappeared but it always something being tested on so we know it was there, somewhere… QoS can be a little boring and it does get a reputation of being difficult to understand, like where and how do I implement QoS? Most of the time QoS is not configured which causes applications to suffer in the end have an impact of end user performance. Throwing bandwidth to fix the problem is usually a costly risk, and remember you still may have the same performance problems. What also makes it interesting is you may have an environment that runs fine without QoS, so why do you need it? Well there’s no easy button to fix or find these unanswered questions about QoS. In this post I’m referencing guidelines of where to start looking which will hopefully help answer some of those unanswered questions. 🙂 Continue reading “Some QoS Guidelines”

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Inter-VLAN Routing on the Nexus 5k.

Nexus-PLineI previously had the chance to play around with the 5596UP switch, and made some notes on how to configure inter-vlan routing. Since this was a 5596UP switch I needed a layer 3 card to take advantage of it. The next-generation units the 5600 include layer 3 without a card required along with introducing 40GB uplinks! However in this post let’s go back to the basics and configure inter-vlan routing on a nexus switch and in this case I am using a 5596UP.  Continue reading “Inter-VLAN Routing on the Nexus 5k.”

Configuring EtherChannel (PAgb)

NetworkSwitchesBundling physical links into one logical link is a common practice to up the bandwidth between switches, you may have this also configured on a server to bundle connections as well. In this tutorial I have two 2960 switches both of them trunking all VLANs on two gigabit ports. So in the end game is get 2gbps instead of 1gbps between switches while using Cisco’s proprietary protocol PAgb.   Continue reading “Configuring EtherChannel (PAgb)”

Is Your Network Healthy?

heart-healthy-netNetworks are becoming more “borderless” as Cisco likes to call it and it’s definitely true. Having the ability to get access to resources remotely without having to be at our office physically is a nice touch, you may even notice higher productivity and who doesn’t want that! Networks have to be in a healthy state in order for people remotely and people at the office to get their work done. An unhealthy network at a business usually loses productivity and customers which in the end comes down to money. How do you know if your network is reaching its capacity along with the general health state of it? Let’s look at some commands and general best practices! Continue reading “Is Your Network Healthy?”

Site-To-Site VPN via CCP

security-gallery-01258I have ran through before on how to create a site-to-site VPN with Cisco SDM which sounds like a repeat but I thought why not bring CCP into light and since I’m studying the newly created CCNA Security (640-554) I figured let’s create a tutorial on it. In this lab I am going to post the running-config of both locations so you can either run it through Packet Tracer or live equipment if you wish. I am running two Cisco 2811s with Advanced Security Version 12.4(24)T8. Let’s do it! Continue reading “Site-To-Site VPN via CCP”