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Cisco CCNA Packet Tracer Ultimate labs: EIGRP troubleshooting lab 5: Can you complete the lab?
Packet Tracer file (PT Version 7.1): https://bit.ly/2lrLJx7
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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=x5REbzj7v-Q
Get the Packet Tracer course for only $10 by clicking here: https://goo.gl/vikgKN
Get my ICND1 and ICND2 courses for $10 here: https://goo.gl/XR1xm9 (you will get ICND2 as a free bonus when you buy the ICND1 course).
For lots more content, visit http://www.davidbombal.com - learn about GNS3, CCNA, Packet Tracer, Python, Ansible and much, much more.
#CCNA #PacketTracer #CCENT
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=x5REbzj7v-Q
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Todd Lammle Giveaway - CCNA books, CCNP books, video training! Enter using these links:
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Packet Tracer file (PT Version 7.1): https://bit.ly/2JVNkpW
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PortFast causes a switch or trunk port to enter the spanning tree forwarding state immediately, bypassing the listening and learning states.
You can use PortFast on switch or trunk ports that are connected to a single workstation, switch, or server to allow those devices to connect to the network immediately, instead of waiting for the port to transition from the listening and learning states to the forwarding state.
Caution: You can use PortFast to connect a single end station or a switch port to a switch port. If you enable PortFast on a port that is connected to another Layer 2 device, such as a switch, you might create network loops
When the switch powers up, or when a device is connected to a port, the port enters the spanning tree listening state. When the Forward Delay timer expires, the port enters the learning state. When the Forward Delay timer expires a second time, the port is transitioned to the forwarding or blocking state.
When you enable PortFast on a switch or trunk port, the port is immediately transitioned to the spanning tree forwarding state.
Transcription:
Think about your PC today.
How long does it take your PC to boot up?
PCs today don’t take 30 seconds to boot up. A lot of them are available within a few seconds or instantly. That’s a problem when we have technology such as Spanning Tree that take 30 seconds to converge and forward traffic on a network.
What I’m going to do is power cycle the devices and I’ll put the lab into simulation mode.
Notice the switch has now booted up. Interfaces are showing orange. So what happens now is, if the PC sends a renew message, that DHCP message is going to be sent to the switch and then it’s going to drop until the ports go to green.
So once the ports go to green, the DHCP request message can be forwarded but previously, that message from PC 1 was dropped because the ports were transitioning from listening to learning to forwarding. So during that period of time, DHCP messages will be dropped by the switch.
So let’s configure Spanning Tree PortFast on the switch.
On which ports do I need to configure it?
I need to configure it on both the client ports and this server port. We essentially want these 3 ports in this topology to transition to the forwarding state immediately.
Okay, so here’s the switch. What I’m going
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interface Tunnel 111
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bandwidth 1000
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ip nhrp network-id 100000
ip nhrp authentication cisco
ip mtu 1400
ip tcp adjust-mss 1360
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Which adapters are the best for WiFi hacking? Kody of Null Byte and Hak5 fame gives us his advice on what to buy. You can purchase a monster attenna like the Tube U, or something smaller like the AWUS036NHA or WEMOS D1 Mini or WiFi Nugget. Lots of options for different price points.
// MENU //
00:00 - What Kind of Interview is This?
00:24 - Introducing//Kody Kinzie
01:17 - Null Byte//What Happened?
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04:03 - Kody's Project//The WiFi Nugget
07:04 - It Looks Like A Lightsaber//Best Alfa WiFi Adapter?
08:48 - Hacking from the Hollywood Sign
10:37 - Small WiFi Adapters//The NEH or the NHA?
12:08 - Favourite OS//Kali Linux or?
13:15 - Difference//Pi vs Microcontrollers
15:28 - WiFi Hacking//What is a WiFi Nugget?
19:55 - Flashing Hacking Tools On the Nugget
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37:52 - CircuitPython instead of Ardruino
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48:24 - Thank Tou & Closing Thoughts
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51:47 - Don't Make It Your Entire Identity
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Recommended Adapters:
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This is Part 2 of my CML-Personal (VIRL 2) series showing you how to download, install and configure Cisco Modeling Labs - Personal (VIRL 2) using VMware Player and Windows 10. The new version of Cisco VIRL allows you to create virtual Cisco networks using just your Web browser. You don't have to use a thick client or any other software - everything is included and everything is easy to use.
The new version of Cisco VIRL 2 is one of your best options for CCNA, CCNP and CCIE Labs. VIRL 2 has multiple advantages over other platforms such as GNS3 or EVE-NG. VIRL 2 supports an HTML5 web client and contains all the Cisco IOS images. You don't have to use a thick client like you do with GNS3. You don't have to follow a convoluted process to get Cisco images working like you do with EVE-NG.
You don't have to try to find images as they are all included as part of your VIRL subscription and by simply mapping an ISO drive to your virtual machine you can immediately start using all Cisco IOS images in your topologies. Both EVE-NG and GNS3 require that you provide your own IOS images - typically they recommend that you buy a VIRL subscription anyway. That means that you are already paying for VIRL.
VIRL2 is also an official Cisco product - that means that you don't have to worry about any gray legal issues with regards to running Cisco IOS images on your laptop. This is an official Cisco product that is supported by Cisco. By paying your yearly subscription fee of $199, you can use Cisco IOS images such as IOSv, IOSvL2, ASAv, NX-OSv and others without any worries. VIRL 2 has everything you need to get started.
Disadvantages include the requirement to license your installation. That however has been simplified dramatically from previous releases. There is also a 20 node limited in topologies. However, for most of us that is fine for a lot of labs.
Is VIRL better than GNS3 or EVE-NG? In many ways it is. But, all platforms have advantages and disadvantages. If you are studying for your ccie, you many prefer gns3 or eve-ng as they don't limit the number of devices in a topology like virl does. VIRL-PE limits you to 20 devices - so your topologies cannot be massive like they could with gns3 or eve ng. However, if you are studying for your ccna or ccnp, VIRL may be more than enough.
Cisco have made massive changes to their certification programs and it is fantastic to see the new version of VIRL in action.
Menu:
Overview: 0:00
License VIRL server: 0:54
Start VIRL topology: 2:06
Interface overview: 2:42
Open Device Console: 4:20
Configure Cisco Network: 5:30
Rename Nodes in VIRL: 7:20
Create loopbacks and enable OSPF: 7:57
Do I recommend VIRL? 11:00
Videos mentioned:
VIR2 Part 1: https://youtu.be/sW5-jHLygFg
VIRL 2 Cisco Live: https://youtu.be/5xUvqDMxH3g
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