date command This command displays the operating system date and time. Administrators also use this command to set the date and time; therefore, only users with root privileges can do that. By default, the date command displays the date of the current time zone. Also, the date command can show dates and times in different […]
In this topic, we are going to proceed with basic vPC configuration on NX-OS. Let’s review what we would need upfront before the configuration. We would need L3 connectivity for Peer Keepalive. For example, the management interface. We would require to enable vPC and LACP features. LACP must be used on all member interfaces as […]
Introduction Topology : Individual Point-to-PointTechnology : IPSec VTI (Virtual Tunnel Interface) IPsec VTI solution provides a secure connection when we use Internet or service providers as the backbone. IPsec is the only method to secure VPN site-to-site. IPsec provides a security triangle which prevents several potential threats on internet such as masquerading, eavesdropping, man-in-the-middle, etc. […]
After covering Port-Channel let’s know talk about virtual Port Channel (vPC). virtual Port Channel allows two NX-OS switches to provide a single port-channel to the downstream devices (Similar to VSS and Stackwise in Catalyst environment). Without vPC, STP blocks one of the ports. In addition, you don’t have high availability. Note that the downstream switch […]
Link Aggregation Port-channel is to NX-OS as EtherChannel is to Catalyst. Juniper calls it Aggregated Ethernet interface while Microsoft refers to NIC Teaming . In fact, all refer to the same concept of grouping couple of ports together in to a single logical interface. Above all, The main advantage of grouping some ports into a […]
In this post I am going to discuss about different network architecture: the traditional campus design, then Spine-Leaf (AKA Leaf-and-spine architecture) and what problems the spine-leaf network design addresses. Classic Three-Tier Architecture You can have a flat network design with a large broadcast domain wherein all network equipment, PCs, printers, APs, connects to each other […]
Variables A symbolic name for a chunk of memory to which we can assign values, read and manipulate its contents. A variable in bash can contain a number, a character, a string of characters. Variable in Bash dose not have data types. You have no need to declare a variable, just assigning a value to […]
Input, Output and Error Redirections Based on the concept of ANSI, input/output streams called standard output and standard input, everything that runs in a shell can communicate in three ways – it can receive inputs from standard input, it can output results and information to standard output, and it can report errors to a separate […]
This Bash scipting tutorial is designed for beginners and Intermediate levels. You will learn all of concepts that we may face in Bash Scripting. Also, we will provide an advanced course for administrators and specialists who wants to learn Bash Scripting for working with specific fields like Linux Administration and cisco automation etc. Before learning […]
pwd Command The “pwd” command is one of the most frequently used commands in the short form of Print Working Directory. Each time users interact with the shell, they work within a directory. So the “pwd” prints the directory that the user is currently working within. “pwd” without any options, displays the full path to […]
Elissa Garlin
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