Aruba Switching

11. OSPFv2 Single Area

OPFv2 Router ID and Messaging OSPFv2 is the most popular option for corporations to route traffic within their networks. OSPF Introduction OSPF does not use UDP or TCP. OSPF advertisements are placed directly in an IP packet, therefore it does not have a TCP or UDP port number. It has IP protocol number 89. NOTE: The IP protocol number is…

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Aruba Switching

10 . IP Routing Part 3

Route Types and Administrative Distance Connected and Local Entries Connected: the subnet is physically connected to the switch and there is no need for a next hop device Local: the subnet is configured inside the switch. This could be a loopback interface or Switch Virtual Interface (SVI). Static Routes You need a static route when the destination network is not…

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Aruba Switching

9. IP Routing Part 2

Subnetting IPv4 Address Classes The IPv4 address space is divided into 5 classes (A to E) each of which is designed for a particular purpose. Class A: the first octet is between 0 and 127. The first octet (8 bits) is reserved for the network ID which means 3 octets (24 bits) are available for hosts on the network Class…

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Aruba Switching

8. VRRP (Virtual Router Redundancy Protocol)

An endpoint may only have one DG (Default Gateway), and a single DG means a single point of failure. In this example, if Core-1 is the DG for PC-1 and Core-1 fails, PC-1 and any other endpoints using Core-1 as the DG will be isolated. You could add another DG for redundancy, but you would have to somehow change the…

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Aruba Switching, Technology

7. IPv4 Routing Part 1

Routing IP routing connects VLANs together and routes packets between them. Routing devices use Layer 3 packet analysis to forward L3 packets. Layer 2 switches forward frames among devices in the same LAN by processing Layer 2 headers.  This is based on destination MAC addresses. Layer 3 devices move packets between LANs based on Layer 3 IP addresses. Routing Layer…

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PowerShell, Technology

Creating Bulk DNS Records with PowerShell

PowerShell is a great tool for managing your repetitive tasks with DNS records. In this example I will show you how you can bulk import DNS records to Windows DNS servers.     Populate a CSV with your device names and IP’s In PowerShell, import your CSV with the devices and IPs: #Import CSV $devices = Import-Csv “\\ServerPath\devices.csv” 3. Loop…

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PowerShell, Technology

Automating Windows Server Updates with PowerShell

Introduction If you are anything like me, you probably get fed up managing Windows Server updates manually pretty quickly. Logging onto servers, checking for updates, installing them, rebooting them, trying to keep track of which servers have been updated, what updates were installed etc… etc… I wanted to automate the process but still have control over when the updates were…

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Azure, Office 365, Technology

SC-300 Course: Microsoft Identity and Access Administrator (Study Notes)

  I am currently studying for my SC-300: Microsoft Identity and Access Administrator exam. I am studying the content using John Christophers course on Udemy: https://www.udemy.com/course/sc-300-course-microsoft-identity-and-access-administrator/ On the following posts I will be uploading some of my study notes. This keeps me honest with making sure I keep have decent notes and hopefully they will be of help to other…

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