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CCNA #068 How to configure Layer 3 switching and interVLAN routing for the CCNA Exam (Part3)
In this video I discuss how to configure inter-VLAN routing and layer 3 routing on a switch. This is one of multiple videos which help you prepare for the CCNA exam. My CCNA full course is here: http://www.ccnax.com
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https://www.youtube.com/watch?v=XOGzUMzuhT0
Get $200 worth of network software for free here: https://goo.gl/613TUF
#CCNA #CCENT #CCNP
Subscribe to learn how to pass the CCNA 200-125 exam. Also includes content for the ICND1 100-105 and ICND2 200-105 exams.
What do you want to learn? Let me know via the comments.
...
https://www.youtube.com/watch?v=XOGzUMzuhT0
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More free Python videos here: https://www.youtube.com/playlist?list=PLhfrWIlLOoKPn7T9FtvbOWX8GxgsFFNwn
Learn Python programming with GNS3. In this series of videos I will show you how you can quickly and easily program Cisco networks using Python. Cisco Wired LAN Design Guide: https://goo.gl/k855Vj
Script on Github: https://github.com/davidbombal/pythonvideos/commit/8aa5917f132c3d8956fee9337f24b30067b0413d
Transcription:
This is one of the multiple videos showing you how to use Python to configure Cisco networks.
In this example, we're going to use Netmiko to configure a campus network running in GNS3 based on a validated Cisco technology design guide for campus wired local area networks.
Ok so the first thing we need to do is copy our script and this is the script that is using the Cisco design guide. So I'll create a file called Netmiko Cisco design and I'll paste the script into that file.
So here's our Netmiko file. We are connecting to each switch in the topology once again. We are opening up a file called IOSv L2 Cisco design. We are going to apply that to the access switches and then we'll open up a core file and apply that to the core switches. We've actually already applied the configuration to the core switches. So the important file that we need to create now is our access layer switch source files…
So here's the configuration that we want to apply on our access switches. So I'll paste that configuration in. So as you can see it's quite a large configuration.
I'll exit and save the file so the following we need to run is the Cisco design file. So Python Netmiko Cisco design. Now again one of the great reasons for using GNS3 is you can test your scripts and make sure that they work properly before you try and deploy this in a production environment.
So there's the configuration that we're going to apply to the access layer switches. So at the moment, on Switch 5, notice we've got a lot of configuration added to the switch. I'll just do something you don't really want to do in production and that is a stop the script and the reason why is I want to show you what the current configuration looks like on a switch like Switch 4.
So notice we have some basic configuration. There is no certificate, we have some trunk port configuration on the access port ports belong to VLAN 2 but that's the only configuration on gigabit 2/0 and notice is not much else configuration.
So let's run that script again. It's connected to Switch 5, so ready on Switch 5. You can see that a certificate exists. Notice all the error disabled options have been added. There's our voice VLAN and our data VLAN trunk ports look the same. W
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https://www.youtube.com/watch?v=9uUK0nwuLrk
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Enhanced Interior Gateway Routing Protocol (EIGRP) is an advanced distance-vector routing protocol that is used on a computer network for automating routing decisions and configuration. The protocol was designed by Cisco Systems as a proprietary protocol, available only on Cisco routers. Partial functionality of EIGRP was converted to an open standard in 2013 and was published with informational status as RFC 7868 in 2016.
EIGRP is used on a router to share routes with other routers within the same autonomous system. Unlike other well known routing protocols, such as RIP, EIGRP only sends incremental updates, reducing the workload on the router and the amount of data that needs to be transmitted.
EIGRP replaced the Interior Gateway Routing Protocol (IGRP) in 1993. One of the major reasons for this was the change to classless IPv4 addresses in the Internet Protocol, which IGRP could not support.
Almost all routers contain a routing table that contains rules by which traffic is forwarded in a network. If the router does not contain a valid path to the destination, the traffic is discarded. EIGRP is a dynamic routing protocol by which routers automatically share route information. This eases the workload on a network administrator who does not have to configure changes to the routing table manually.
In addition to the routing table, EIGRP uses the following tables to store information:
Neighbor Table: The neighbor table keeps a record of the IP addresses of routers that have a direct physical connection with this router. Routers that are connected to this router indirectly, through another router, are not recorded in this table as they are not considered neighbors.
Topology Table: The topology table stores routes that it has learned from neighbor routing tables. Unlike a routing table, the topology table does not store all routes, but only routes that have been determined by EIGRP. The topology table also records the metrics for each of the listed EIGRP routes, the feasible successor and the successors. Routes in the topology table are marked as "passive" or "active". Passive indicates that EIGRP has determined the path for the specific route and has finished processing. Active indicates that EIGRP is still trying to calculate the best path for the specific route. Routes in the topology table are not usable by the r
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https://www.youtube.com/watch?v=9MMOPsg3OH0
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GNS3
gns3-talks-python-for-network-14
Udemy: Get the course for $10 here: https://goo.gl/QYC988
GNS3 Academy: Get the course for $10 here: https://goo.gl/vnZJhg
More free Python videos here: https://www.youtube.com/playlist?list=PLhfrWIlLOoKPn7T9FtvbOWX8GxgsFFNwn
Learn Python programming with GNS3. In this series of videos I will show you how you can quickly and easily program Cisco networks using Python.
================================
Script on GitHub:
================================
https://github.com/davidbombal/pythonvideos/commit/8a39cd4b16afc8f34564b1201d0d37800dd50c81
Transcription:
This is one of multiple videos teaching you network programmability using Python and GNS3.
This is one of the multiple videos showing you how to use Netmiko to configure a GNS3 topology.
In this topology, we have 5 Cisco IOSv switches; Switch 1, Switch 2, 3, 4 and 5. Switch 1 and 2 are acting as core switches in this topology and switches 3, 4, and 5 are acting as access switches. I've got an Ubuntu docker container with Python installed as well as Netmiko.
We will use a Python script to configure this port, this port and of this port as access ports in this campus topology and all the links between the switches will be configured as trunk ports.
Switch 1 and Switch 2 have been configured a spanning tree root and backup root but essentially, all that's been configured on these switches is IP addresses and SSH to allow the Python script to SSH to the switches and configure them.
So essentially the switches have been configured with an IP address and SSH to allow the Python client to SSH to them and configure them.
The Python script that we are going to use is fairly simple. We're using Netmiko, so we've got to the statement from Netmiko import connect handler. We are then specifying the details of the switches in the topology. Switch 1 has this IP address, Switch 2 has this IP address, Switch 3, Switch 4 and Switch 5.
I've named the devices iosv_l2_s1, here's s2, s3, s4 and s5. Now we could optimize the code more than we have here.
But notice there's only a few lines to configure the switches. I'm using a with statement to open a file called iosv_l2_ config that file will have these commands in it.
Essentially, what we're going to do in the topology is create a VLAN 2 and configure interfaces gigabit 2/0 - 3 as access ports in VLAN 2.
At the moment only gigabit 2/0 is connected to a PC. But let's assume that there are additional interfaces that need to be configured in VLAN 2,
So these are the access ports on the switch. Other interfaces, so gigabit 0/0 - 3 will be configured as trunk ports.
We’ll explicitly configure the encapsulation as dot1q set the mode to trunk. Turn off DTP and allow VLANs 1 and 2.
In addition, we could configure gigabit 1/0 and 1/1. So we could d
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https://www.youtube.com/watch?v=gEVFRBnjpS4
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WIRE
wire-tap-the-network-shorts-kalilinux
Did you know you could tap a network like this?
#shorts #kalilinux #android
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https://www.youtube.com/watch?v=l-wQVuqL2XA
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What does a switch do with broadcast traffic? Free software worth $200: https://goo.gl/613TUF
Ostinato - Network Traffic Generator Part 4. Easily create packets for testing in your GNS3 network.
Ostinato is a packet crafter, network traffic generator and analyzer with a friendly GUI. Also a powerful Python API for network test automation. Craft and send packets of several streams with different protocols at different rates. Think of it as “Wireshark in Reverse”.
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// Detailed Timestamps //
00:00 - Introduction and motivational thoughts
01:02 - The importance of facing challenges and self-improvement
02:03 - Discussion on the book "Can't Hurt Me" by David Goggins
02:59 - The impact of small changes and the book "Atomic Habits"
03:31- Believing in yourself and ignoring negativity
04:05 - Dealing with haters and negativity online
04:53 - Surrounding yourself with supportive people
05:12 - Belief and motivation in changing your life
06:00 - The importance of continuous learning in technology
06:26 - Riding the waves of changing technology
06:54 - The emergence of AI and ChatGPT
07:00 - Seizing new technology opportunities
07:35 - The importance of deep work and minimizing distractions
08:05 - Time management and productivity
08:39 - The impact of daily improvement
09:00 - Learning about finances and investments
09:16 - Learning programming languages like Python
09:25 - The role of AI in enhancing productivity
09:33 - The need for discipline and overcoming excuses
09:57 - Taking ownership and control of your life
10:33 - The book "The Four Hour Work Week" and focusing on control
11:20 - Using time effectively and the importance of learning
11:37 - The power of taking control and making changes
11:48 - The importance of healthy eating and time management
12:02 - Various inspirational stories of personal change
12:48 - The 80/20 principle and its application in life
13:05 - The potential of AI and different levels of engagement
13:47 - The various paths in technology for 2024
14:00 - The importance of APIs
14:38 - Opportunities in IoT device security
14:58 - Networking as a stable but not trendy field
15:17 - The consistent demand for networking skills
15:51 - The necessity of cloud skills and certifications
16:01 - The emerging field of quantum computing
16:44 - Combining skills and fields for a unique career path
17:31 - AI as a major focus area
18:00 - Cisco's shift towards cybersecurity
18:51 - The growth of cybersecurity jobs
19:24 - The importance of APIs in cybersecurity
19:40 - IoT device security and opportunities
20:14 - The value of networking knowledge in tech
21:17 - AI as a key skill for 2024
22:44 - The intersection of cloud with other tech fields
22:56 - The critical role of APIs in technology
23:38 - Opportunities in IoT security
24:17 - The evolution of networking and its current status
24:59 - The shift in networking focus towards cybersecurity
25:17 - The indispensability of cloud knowledge
26:54 - The foundational skill of Linux
27:33 - Programming as a life-changing skill
28:00 - The importance of learning Python
28:39 - Networking as a foundational skill across tech fields
29:17 - The necessity of cloud skills
29:32 - The importance of understanding virtualization
30:10 - Concluding thoughts on making a change in 2024
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Please note that links listed may be affiliate links and provide me with a small percentage/kickback should you use them to purchase any of the items listed or recommended. Thank you for supporting me and this channel!
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