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Showing posts from August, 2019

Automating VLAN Creation on Cisco Devices with Ansible

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  Automating VLAN Creation on Cisco Devices with Ansible Ansible is a powerful automation tool that simplifies network management tasks, including creating VLANs on Cisco devices. For beginners, this guide will walk you through automating VLAN creation step-by-step, from setting up Ansible to deploying VLAN configurations. What is a VLAN? A VLAN (Virtual Local Area Network) is a logical group of devices within a network that can communicate as if they were on the same physical network, regardless of their physical location. VLANs improve network efficiency and security by segmenting traffic. Why Use Ansible for VLAN Automation? Consistency: Avoid manual configuration errors. Efficiency: Configure multiple devices in seconds. Scalability: Manage large-scale networks easily. Flexibility: Supports various Cisco devices and integrates with other tools. Prerequisites Cisco Device Configuration: Ensure your Cisco devices support SSH and are configured to allow Ans...
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VMware NSX and VMware SDN | IT NETWORKS

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VMware NSX and VMware SDN VMware NSX is the VMware SDN network security and virtualization platform that emerged from VMware in 2012. This acquisition launched VMware in the world of software-defined networks (SDN) and network function virtualization (NFV). The solution decouples the network functions of the physical devices, analogously to the decoupling of virtual servers (VMs) from physical servers. To decouple the new virtual network from the traditional physical network, NSX recreates traditional network constructions in virtual space: these constructions include ports, switches, routers, firewalls, and other required components. In the past, It was possible to see and touch the switch port to which a server is connected, but now, this is no longer possible. Basically, they still exist with NSX, but it is no longer possible to touch them physically. It is for this reason, the virtual network is sometimes harder to conceptualize. There are two different produ...
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SDWAN : Software Defined Wide Area Network | IT NETWORKS

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What is SD-WAN? SD-WAN or Software Defined Wide Area Network (SD-WAN) is a virtual WAN architecture that allows organizations to take advantage of any combination of transport services like MPLS , LTE and broadband Internet - to connect users to applications. An SD-WAN uses a centralized control function to drive traffic securely and intelligently over the WAN . This increases application performance, improving the user experience, increasing business productivity, and reducing IT costs. What Problems Does SD-WAN Solve? 1)  MPLS cost and constraints Multiprotocol label switching (MPLS) has been the main used routing technique of WAN connectivity between enterprise sites, it delivers guaranteed bandwidth, predictable latency, and privacy. Unfortunately it has it’s restrictions 1.1  Cost MPLS is very expensive and may charge enterprises additional expanses. 1.2  Constraints MPLS cannot be installed in all geographic locatio...
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CISCO : Dynamic Multipoint Virtual Private Network (DMVPN) | ITNETWORKS

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1- Definition   DMVPN is a technology that's used in secure networks exchanging data between them without needing to redirect traffic through a  headquarter  server  or router . Dynamic Multipoint VPN ( DMVPN ) is a Cisco IOS Software solution for building reliable IPsec Virtual Private Networks (VPN). DMVPN basically is a centralized architecture that provides easier management and implementation for deployments that need very specific access controls, authorizations and restrictions for diverse branches, users, applications and partners. DMVPN + IPSEC 2- Benefits DMVPN provides the ability to create dynamic VPNs without configuring static tunnels between remote peers, including Internet Protocol (IP), IPSEC and Key Management Protocol (ISAKMP peers).   DMVPN is designed  to make HUB-AND-SPOKE   topology  by statically configuring the hub IP address on the spokes, no other changes are needed ...
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