Virtual Device Context (VDC) With Cisco NX-OS VDC you can divide a physical N7K series switch into multiple logical switches, it will have different management/control and definitely different data planes. By default all ports belong to the default VDC. From default VDC you can create other VDCs and/or jump to them (with command switchto vdc). […]
Lab Introduction It is undeniable that during a learning process it would be helpful if we could deal with the examples of real-life challenges in order to commit to memory and put them into practice. For practicing in the realm of data transmission network. They help to simulate and emulate the traffic flow, configurations, related […]
Double-Sided vPC Dual-sided vPC or Double-side vPC as known as back-to-back vPC or multilayer vPC is combination of multiple vPC layers. In double-sided vPC we have two layers of vPC pairs. Traditionally, our access layer switches are in vPC whose southbound links connect to servers. Their northbound links connect to aggregation layer who are also […]
IP Service Level Agreement (IP SLA) IP SLA allows you to probe different key performance indicators of the network such as reachability, latency, jitter, etc. For the purpose of CCIE Datacenter, we are only going to enable feature sla sender. In particular, I am going to explain the ICMP echo configuration. Frequency: The seconds between […]
We talked about windows server 2022 and the installation in the previous posts. Now we are going to talk about some initial configurations after installing a windows server. These are some important things to do. We have 2 ways of performing these configurations. 1- Graphically 2- Command line Initial Configurations Graphically Change the server’s name […]
Installing Cisco Unified Communications Manager (CUCM) 14 Hi everybody, this is the first step-by-step tutorial on installing and implementing Cisco Unified Communications Manager (CUCM). I try to simulate different practical scenarios and valuable projects that any VOIP a specialist might confront the most the organizations and enterprise companies. Why CUCM? Well, I think the first […]
Filename As we mentioned before, In Linux, everything is a file. So every file must have a filename. A Filename in Linux is a path to the file that contains the directory name and basename. The directory name is the directory path to the file’s parent directory. The basename is the exact name of the […]
Fortigate Network Configuration In the previous lesson https://old.smenode.com/fortigate-initial-configuration/ we learnt about initial configuration of fortigate. In this post we are going to know how to configure the network interfaces and set the default route. So, the below picture is our topology and lab. Let’s config the rest of firewalls. LAB Overview In first step, we […]
BFD Overview When a link fails, with routing protocols we need to wait until hold time or dead-interval expires then we recalculate the route to the destination. We could lower the hello packet as well as dead-interval timers to expedite the convergence. However, not only we are still talking about some seconds of downtime but […]
We talked about directory content list commands in the previous post and introduced the “ls” command. We will continue the last lesson here, But before that, we have to get to know special characters and their usages. Special characters In Linux, a group of characters have special meaning and act in two different ways in […]
Elissa Garlin
Think of a news blog that’s filled with content hourly on the day of going live.