September 2019 - Cloud Network

Cloud Network

Networking | Support | Tricks | Troubleshoot | Tips

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    Monday, September 30, 2019

    How to Install Python 3.7.4 and PiP on CentOS 8

    September 30, 2019
    How to Install Python 3.7.4 and PiP on CentOS 8
    To Check Python Version or If Pervious Install
    Step1 :- python3 --version
                    or
             python3.7 --version




    To Set Default Python
    Step2 :- sudo alternatives --config python
    You need to select '2' option i.e., type '2' hit enter

    To Check Without typing Version of python
    Step3 :-  python --version




    Now PiP
    To Check PiP Version
    Step4 :- pip3 --version 
                or
             pip3.7 --version

    To Set Default pip
    Step5 :- alias pip=pip3

    To Check Without typing Version of python
    Step6 :-  pip --version










    That's it...
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    What are the Basics of VM Networking ?

    September 30, 2019
    What are the Basics of VM Networking ?

    Two Basic of VM Networking, they are
    1. Network Interface Cards and 2. Virtual LANs
    VM Networking
    Improves Components 
    network speed network interface cards
    reliability virtual LANs
    flexibility software-defined networking and
    scalability virtual switches
    security
    productivity  and
    efficiency

    VMware NSX

    Enable your virtual cloud network to connect and protect applications across your data center, multi-cloud, bare metal, and container infrastructure. VMware NSX Data Center delivers a complete L2-L7 networking and security virtualization platform — providing you with the agility, automation, and dramatic cost savings that come with a software-only solution.

    VMware NSX is the VMware SDN network virtualization and security platform that emerged from VMware after they acquired Nicira in 2012. This acquisition launched VMware into the software-defined networking (SDN)  and network functions virtualization (NFV) world.

    The solution de-couples the network functions from the physical devices, in a way that is analogous to de-coupling virtual servers (VMs) from physical servers. In order to de-couple the new virtual network from the traditional physical network, NSX natively re-creates the traditional network constructs in virtual space — these constructs include ports, switches, routers, firewalls, etc.

    In the past, everyone knew what these things were. It was possible to see and touch the switch port that a server connects to, but now, this isn’t possible. Fundamentally, these constructs still exist with VMware NSX, but it is no longer possible to touch them. It is this reason, the virtual network is sometimes harder to conceptualize.

    There are two different product editions of NSX: NSX for vSphere and NSX for Multi-Hypervisor (MH). It’s speculated they will merge down the road, but for many possible, or soon to be, users of NSX, it doesn’t matter, because they are used to support different use cases. NSX for vSphere is ideal for VMware environments, while NSX for MH is designed to integrate into cloud environments that leverage open standards, such as OpenStack.

    Microsegmentation

    Micro-segmentation software uses network virtualization technology to create increasingly granular secure zones in data centers and cloud deployments, which isolate each individual workload and secure it separately.

    Micro-segmentation is a network security technique that enables security architects to logically divide the data center into distinct security segments down to the individual workload level, and then define security controls and deliver services for each unique segment. Micro-segmentation enables IT to deploy flexible security policies deep inside a data center using network virtualization technology instead of installing multiple physical firewalls. Also, micro-segmentation can be used to protect every virtual machine (VM) in an enterprise network with policy-driven, application-level security controls. Because security policies are applied to separate workloads, micro-segmentation software can significantly bolster a company’s resistance to attack.


    Virtual private network (VPN)
    A virtual private network, or VPN, is an encrypted connection over the Internet from a device to a network. The encrypted connection helps ensure that sensitive data is safely transmitted. It prevents unauthorized people from eavesdropping on the traffic and allows the user to conduct work remotely.  VPN technology is widely used in corporate environments.

    Virtual switch
     

    A virtual switch (vSwitch) is a software application that allows communication between virtual machines. A vSwitch does more than just forward data packets, it intelligently directs the communication on a network by checking data packets before moving them to a destination.

    Virtual switches are usually embedded into installed software, but they may also be included in a server’s hardware as part of its firmware. A virtual switch is completely virtual and can connect to a network interface card (NIC). The vSwitch merges physical switches into a single logical switch. This helps to increase bandwidth and create an active mesh between server and switches.

    Network functions virtualization (NFV) 
    Network functions virtualization (also network function virtualization or NFV)[1] is a network architecture concept that uses the technologies of IT virtualization to virtualize entire classes of network node functions into building blocks that may connect, or chain together, to create communication services.

    NFV relies upon, but differs from, traditional server-virtualization techniques, such as those used in enterprise IT. A virtualized network function, or VNF, may consist of one or more virtual machines running different software and processes, on top of standard high-volume servers, switches and storage devices, or even cloud computing infrastructure, instead of having custom hardware appliances for each network function.

    For example, a virtual session border controller could be deployed to protect a network without the typical cost and complexity of obtaining and installing physical network protection units. Other examples of NFV include virtualized load balancers, firewalls, intrusion detection devices and WAN accelerators.
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    How to Fix Windows Update Error Encountered in Windows 10

    September 30, 2019
    How to Fix Windows Update Error Encountered in Windows 10


    Step1 :- Run the Windows Update troubleshooter

    Step2 :- Click on next

    Wait till the process completed


    Method 2
    Step3 :- if problem didnt solve the follow other steps


    Restart your device and check for updates.
    Step4 :-

    Step5 :-


    Method 3
    Windows Update Troubleshooter

    https://aka.ms/wudiag - download here, run this, and see if that can detect and fix your problem. I know you said you tried this, but not sure if you used this diag tool, worth a shot.

    If no luck, we'll run a couple of scans to try to repair corrupt sys files.

    Click start, type “cmd” - right click and run as admin - then copy and paste this:

    DISM.exe /Online /Cleanup-image /Restorehealth

    Hit enter, and wait for that to finish, and move onto the next command. Type(or copy and paste):

    sfc /scannow

    Hit enter, and after this finishes, reboot, and try windows updates again.

    If no dice with all these methods, I’d entertain a windows reset.

    Start > Settings

    Click on Update & Security > Recovery

    Once in that tab, click on “Get Started” under Reset this PC.

    This should take a moment, and you’ll be prompted to “Keep my files” or “Remove everything” - The process will start once one is chosen, your pc will reboot and a clean install of windows will start.

    I’d back up your files, and take note of your apps, but this would be a solid way to get windows on a clean slate and have updates working properly again.


    Method 4
    Let’s try to manually purge the update cache.

    click start and type cmd, right click and run as admin. Type:
    “net stop wuauserv” and press Enter.

    Click start, type control panel - file explorer options - click the view tab, and make sure “show hidden files...” is buttoned off.

    Once done, navigate to C:\Windows\SoftwareDistribution\Download and delete the content of the Download folder.

    Click start again, type cmd, right click and run as admin, type:
    “net start wuauser” and hit enter.

    Reboot, and try to check for updates again.

    Method 5
    So it’s not even checking for updates... last checked on the 22nd... something happened.

    Click start - type “services.msc” and open it - go to the Windows Update service, and right click and go to properties. Is it running? If not, try to start it. If it starts, try to go back to Win Updates and run them.

    If no dice, I think we should entertain a system restore to before the 22nd.

    Click on Start - and type "control panel" and click on it

    Once open, search "recovery" and hit enter. When it comes up, click on recovery.

    On the next page, open "open system restore"

    They'll be a box that says "click for more restore points" that I would click. Choose a restore point (before this happened), and follow the prompts.

    ** Please note, all your files and photos, etc will be fine. Any applications (ex. candy crush) you've installed since the point you're going back to will be removed. Just a heads up ** 
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