Lab 2 1 Subnet Design - FlameSpyro/Tech-Journal GitHub Wiki

Overview

  • This lab required us to create a divided network using a table and then apply it to an existing packet tracer file. The following images will be using 10.19.0.0/16 as a base.

Nitty Griddy of Subnetting

  • Here is the starting chart given chart

  • The final result has a few notes in the creation process.

  1. The charts should ALWAYS be organized from highest to lowest in the host count
  2. Always ensure the first and last of the IPs are reserved for the Net/Broadcast address. I have also attached a subnet chart for all CIDRs. chart2
  • Subnetting can seem a little tricky at first but once it's broken down it can easily be done in the head but it's always nice to have a reference!
  • Only a select few of these are actually used in networking nowadays. holygrailofsubnets

Good 'ol Packet Tracer

  • Packet tracer is a double-edged sword when it comes to learning interfacing in networking. This is mainly due to the use of a GUI which you may not always have so it's important to understand how to use the commands in the future!

Command Levels

  • Cisco cmds have 4 tiers of privilege that are constantly jumped between:
  1. User EXEC Mode: Basic commands. router>
  2. Privileged EXEC Mode: Essentially root, access by typing enable in tier 1 router>#
  3. Global Config Mode: Device-wide configuration, configure terminal gets you there router(config)#
  4. Interface Config Mode: Interface settings, enter by entering interface ethernet # router(config-if)#

Trunking

  • Lab-wise trunking is super simple as it allows for a nice and organized vlan system to be spread across multiple routers.
  • Ensure that all desired ports are all matched up if you want them to connect. For example a router with 3 specific vlans must have those same vlans trunked in both ports before connecting.

Other CMDs

  • router(config)#vlan 107: Creates and enters vlan configuration
  • name "whatever" to change name
  • router(config-if)#switchport mode trunk switches desired port to trunk
  • router(config-if)#switchport trunk allowed vlan add # add vlan to trunk. Switch add for remove to get rid of it