David Bombal
David Bombal
Want to learn about IT? Want to get ahead in your career? Well, this is the right place!
On this channel, I discuss Python, Ethical Hacking, Networking, Network Automation, CCNA, Virtualization and other IT related topics.
This YouTube channel has new videos every week! Subscribe for technical, detailed, no fluff content.
David’s details:
Discord: https://discord.com/invite/usKSyzb
Twitter: https://www.twitter.com/davidbombal
Instagram: https://www.instagram.com/davidbombal
LinkedIn: https://www.linkedin.com/in/davidbombal
Facebook: https://www.facebook.com/davidbombal.co
Website: http://www.davidbombal.com
YouTube: https://www.youtube.com/davidbombal
All the best!
David
On this channel, I discuss Python, Ethical Hacking, Networking, Network Automation, CCNA, Virtualization and other IT related topics.
This YouTube channel has new videos every week! Subscribe for technical, detailed, no fluff content.
David’s details:
Discord: https://discord.com/invite/usKSyzb
Twitter: https://www.twitter.com/davidbombal
Instagram: https://www.instagram.com/davidbombal
LinkedIn: https://www.linkedin.com/in/davidbombal
Facebook: https://www.facebook.com/davidbombal.co
Website: http://www.davidbombal.com
YouTube: https://www.youtube.com/davidbombal
All the best!
David
Episodes
Mentioned books

Oct 2, 2019 • 12min
#91: Linux scripts on Cisco IOS?
Did you know you could use these Linux Shell scripts directly on Cisco IOS! No need to use Python or use a Linux VM. Just run these directly on Cisco IOS! You can be a 10x Engineer!
Amaze others with your knowledge of the Cisco IOS. You don't need python for these scripts. Rock that job interview and show senior network engineers what you can do. Keep on learning and change your life. Get that good paying job by showing your skills.
=================================
Documentation:
=================================
Cisco IOS Shell Configuration Guide: http://bit.ly/2kwMyYN
================================
Books:
=================================
Cisco Press Book: https://amzn.to/2LpaU1a
Good O'Reilly Book: https://amzn.to/2Lpbw6Z
=================================
Free TFTP Server:
=================================
Free SolarWinds TFTP Server: http://bit.ly/2mbtD6j
You don't need a linux shell or linux virtual machine to use these commands. You can use them directly in classic Cisco IOS!
=================================
Script 1:
=================================
for xx in `interface Ethernet`; do echo $xx; done
=================================
Script 2:
=================================
for xx in `interface Ethernet`; do echo $xx `show int $xx | inc input errors` ; done
=================================
Script 3:
=================================
function shrun(){
n=-1
while true; do
let n++
if [[ $n -le 3 ]]; then
show run int g0/$n
echo $n
else
break;
fi
done
}
10x Engineer
CCNA
Cisco Devnet Associate
CCNP Enterprise
CCNP Security
CCNP Data Center
CCNP Service Provider
CCNP Collaboration
Cisco Certified Devnet Professional
Cisco Certified Network Professional
LPIC 1
LPIC 2
Linux Professional Institute
LX0-103
LX0-104
XK0-004
David’s details:
YouTube: https://www.youtube.com/davidbombal
Twitter: https://www.twitter.com/davidbombal
Instagram: https://www.instagram.com/davidbombal
LinkedIn: https://www.linkedin.com/in/davidbombal
Facebook: https://www.facebook.com/davidbombal.co
Website: http://www.davidbombal.com
#linux #cisco #DevNet

Sep 25, 2019 • 20min
#90: How well do you know Cisco IOS?
Do you know these time saving Cisco IOS commands? Did you know this was possible traditional Cisco IOS? Use /, +, -, grep, include, section, exclude and lots more directly on Cisco IOS. Be a 10x engineer and show the world your Cisco and Linux skills.
=================================
Menu:
=================================
Documentation Reference: 0:27
Network Topology: 0:59
Cool IOS commands: / + - : 1:35
Linux options on Cisco IOS: 10:17
Personalized sections using grep: 12:30
=================================
More information here:
=================================
Cisco IOS Fundamentals: http://bit.ly/2mTmnfL
Linux Shell: http://bit.ly/2kwMyYN
=================================
Books:
=================================
Cisco Press Book: https://amzn.to/2LpaU1a
Good O'Reilly Book: https://amzn.to/2Lpbw6Z
You don't need a linux shell or linux virtual machine to use these commands. You can use them directly in classic Cisco IOS!
10x Engineer
Cisco Devnet Associate
CCNP Enterprise
CCNP Security
CCNP Data Center
CCNP Service Provider
CCNP Collaboration
Cisco Certified Devnet Professional
Cisco Certified Network Professional
DevNet
LPIC 1
LPIC 2
Linux Professional Institute
LX0-103
LX0-104
XK0-004
David’s details:
YouTube: https://www.youtube.com/davidbombal
Twitter: https://www.twitter.com/davidbombal
Instagram: https://www.instagram.com/davidbombal
LinkedIn: https://www.linkedin.com/in/davidbombal
Facebook: https://www.facebook.com/davidbombal.co
Website: http://www.davidbombal.com
#linux #ccna #DevNet

Sep 23, 2019 • 10min
#89: What's your focus? What are you doing?
Giveaway in memory of my Father. What are you doing with your life? Are you working towards your goals? Or are you wasting your time? What are you goals? Have you written them down? Be effective. Don't be busy.
Free Wireshark link (first 40 people): See video
Free Wireshark random giveaway: http://bit.ly/2mkaMpA
Books:
The 7 Habits of Highly Effective People: Powerful Lessons in Personal Change: https://amzn.to/34WseCt
Living Forward: A Proven Plan to Stop Drifting and Get the Life You Want: https://amzn.to/2NqObE5
David’s details:
YouTube: https://www.youtube.com/davidbombal
Twitter: https://www.twitter.com/davidbombal
Instagram: https://www.instagram.com/davidbombal
LinkedIn: https://www.linkedin.com/in/davidbombal
Facebook: https://www.facebook.com/davidbombal.co
Website: http://www.davidbombal.com
#ccna #wireshark #motivation

Sep 19, 2019 • 26min
#88: DHCP Explained - Step by Step Server Configuration
What is DHCP? How does it actually work? This video shows you practical examples of DHCP in real time and includes Wireshark captures showing you actual DHCP messages.
Menu:
Introduction and basic terms: 00:014
iPhone DHCP Client explanation: 03:46
Lab and DHCP server configuration: 07:54
Cool Wireshark Flow Graph: 15:15
Wireshark deep dive: 17:23
Cisco router output: 22:25
Linux client and Wireshark coolness: 23:07
This video also discusses the difference between static and dynamic IP addresses.
DHCP messages:
DHCPDiscover - Sent by client. Discover / find DHCP servers on the network.
DHCPOffer - Sent by server. Offering an IP address and other parameters for the client to use.
DHCPRequest - Sent by client. The client requests the address that was offered by the server.
DHCPACK - Sent by Server to acknowledge client. Contains information like IP address, lease time, default-gateway and other information.
David’s details:
YouTube: https://www.youtube.com/davidbombal
Twitter: https://www.twitter.com/davidbombal
Instagram: https://www.instagram.com/davidbombal
LinkedIn: https://www.linkedin.com/in/davidbombal
Facebook: https://www.facebook.com/davidbombal.co
Website: http://www.davidbombal.com
#dhcp #dhcpserver #dhcpexplained

Sep 19, 2019 • 7min
#87: Massive CCNA Giveaway! Be quick!
Want to win one of over $3,000 worth of prizes? Boson, CCNA, Python and Wireshark prizes available. Individual prizes vary from about $19 to $369 each.
=================================
Boson Giveaway:
=================================
Enter here: http://bit.ly/2knqWy4
Didn't the Boson giveaway? You can buy it here: http://bit.ly/bosondavidbombal
Boson ExSim-Max Practice Exams: http://bit.ly/BosonExSim
Boson home page: http://bit.ly/2LX27oL
Boson NetSim: http://bit.ly/BosonNetSim
=================================
Wireshark Giveaway:
=================================
First 25 free: http://bit.ly/2kggQ1K
Or, get the course for $10 here: http://bit.ly/2IXZnn8
=================================
Python Giveaway:
=================================
First 25 free: http://bit.ly/2lWg5eB
Or, get the course for $10 here: http://bit.ly/2Wwb0aD
=================================
David Bombal Subscription Giveaway:
=================================
Enter here: http://bit.ly/2mdXECo
Or join immediately here: http://bit.ly/2kyjAb7
================================
Free TFTP Server:
=================================
Free SolarWinds TFTP Server: http://bit.ly/2mbtD6j
10x Engineer
CCNA
DevNet
Cisco Devnet Associate
Wireshark
CCNP Enterprise
CCNP Security
CCNP Data Center
CCNP Service Provider
CCNP Collaboration
Cisco Certified Devnet Professional
Cisco Certified Network Professional
Python
Network Automation
Network Programmability
LPIC 1
LPIC 2
Linux Professional Institute
LX0-103
LX0-104
XK0-004
David’s details:
YouTube: https://www.youtube.com/davidbombal
Twitter: https://www.twitter.com/davidbombal
Instagram: https://www.instagram.com/davidbombal
LinkedIn: https://www.linkedin.com/in/davidbombal
Facebook: https://www.facebook.com/davidbombal.co
Website: http://www.davidbombal.com
#ccna #python #wireshark

Sep 17, 2019 • 17min
#86: Network Automation: Schedule Cisco config backups with kron and archive
Network Automation isn't difficult. With just a few CLI commands you can automate the backup of your Cisco networks. Use Kron and archive to back up configs to TFTP, FTP or SCP servers. Don't try to do everything manually. Automate it! Just like cron in Linux, you can use kron on Cisco IOS to schedule things. Schedule backups, schedule TCL scripts and much more.
Amaze others with your knowledge of the Cisco IOS. You don't need python for these scripts. Rock that job interview and show senior network engineers what you can do. Keep on learning and change your life. Get that good paying job by showing your skills.
Menu:
1) Intro: 0:01
2) IOS requirements: 2:02
3) Lab Setup: 2:42
4) Kron config: 4:24
5) Archive config: 9:01
In later videos I'll show you how to use Python scripts and other cool options on Cisco IOS devices.
================================
Free TFTP Server:
=================================
Free SolarWinds TFTP Server: http://bit.ly/2mbtD6j
=================================
Documentation:
=================================
Kron: http://bit.ly/2kkgIhU
Archive:
http://bit.ly/2kI8BMb
http://bit.ly/2mgQa1L
=================================
Books:
=================================
Cisco Press Book: https://amzn.to/2LpaU1a
Good O'Reilly Book: https://amzn.to/2Lpbw6Z
=================================
Kron Script:
=================================
kron policy-list backupconfig
cli show running-config | redirect tftp://10.1.3.4/r1-shrun.cfg
kron occurrence backupminute in 1 recurring
policy-list backupconfig
kron occurrence backupweekly at 23:00 Sun recurring
policy-list backupconfig
debug kron all
show kron schedule
=================================
Archive Script:
=================================
archive
log config
logging enable
hidekeys
path tftp://10.1.3.4/$h-
wr
time-peiod 10080
!
sh archive
=================================
10x Engineer
CCNA
DevNet
Cisco Devnet Associate
CCNP Enterprise
CCNP Security
CCNP Data Center
CCNP Service Provider
CCNP Collaboration
Cisco Certified Devnet Professional
Cisco Certified Network Professional
Python
Network Automation
Network Programmability
LPIC 1
LPIC 2
Linux Professional Institute
LX0-103
LX0-104
XK0-004
How did you find this video? Did you enjoy learning about kron and the archive of your configs? scripts? All the best!
David Bombal
David’s details:
YouTube: https://www.youtube.com/davidbombal
Twitter: https://www.twitter.com/davidbombal
Instagram: https://www.instagram.com/davidbombal
LinkedIn: https://www.linkedin.com/in/davidbombal
Facebook: https://www.facebook.com/davidbombal.co
Website: http://www.davidbombal.com
#ccna #devnet #python

Sep 17, 2019 • 19min
#85: 10x Engineer: Linux, TCL and EEM scripts directly on Cisco IOS!
Learn TCL, Embedded Event Manager and Linux Shell scripts on Cisco IOS! No need to use Python or use a Linux VM. Just run these directly on Cisco IOS! You can be a 10x Engineer!
Amaze others with your knowledge of the Cisco IOS. You don't need python for these scripts. Rock that job interview and show senior network engineers what you can do. Keep on learning and change your life. Get that good paying job by showing your skills.
Menu:
1) TCL Scripts: 2:00
2) Embedded Event Manager Scripts: 7:45
3) Linux Scripts: 14:05
In later videos I'll show you how to use Python scripts and other cool options on Cisco IOS devices.
================================
Free TFTP Server:
=================================
Free SolarWinds TFTP Server: http://bit.ly/2mbtD6j
=================================
Documentation:
=================================
TCL: http://bit.ly/2mbkRoT
EEM: http://bit.ly/2lQZWHl
Shell: http://bit.ly/2kwMyYN
=================================
Books:
=================================
Cisco Press Book: https://amzn.to/2LpaU1a
Good O'Reilly Book: https://amzn.to/2Lpbw6Z
=================================
TCL Script:
=================================
tclsh
foreach ipaddr {
10.1.1.1
10.1.1.2
10.1.1.3
10.1.1.4
10.1.1.1
10.1.1.2
10.1.1.3
} { ping $ipaddr}
tclsh ping.tcl
=================================
EEM Script:
=================================
event manager applet GIG0_DOWN
event syslog pattern "Interface GigabitEthernet0/0, changed state to administratively down" period 1
action 1.0 cli command "enable"
action 2.0 cli command "config terminal"
action 3.0 cli command "interface g0/0"
action 4.0 cli command "shutdown"
action 5.0 cli command "no shutdown"
action 6.0 syslog msg "What's going on? GIG 0/0 went down!"
!
end
debug event manager action cli
=================================
Linux Shell Script:
=================================
for x in 1 2 3
do
ping 10.1.1.$x
done
function testping(){
ping 10.1.1.1
ping 10.1.1.2
ping 10.1.1.3
ping 10.1.1.4
}
function testecho(){
echo 10.1.1.1
echo 10.1.1.2
echo 10.1.1.3
echo 10.1.1.4
}
10x Engineer
CCNA
Cisco Devnet Associate
CCNP Enterprise
CCNP Security
CCNP Data Center
CCNP Service Provider
CCNP Collaboration
Cisco Certified Devnet Professional
Cisco Certified Network Professional
LPIC 1
LPIC 2
Linux Professional Institute
LX0-103
LX0-104
XK0-004
How did you find this video? Did you enjoy learning about tcl, eem and linux scripts? All the best!
David Bombal
David’s details:
YouTube: https://www.youtube.com/davidbombal
Twitter: https://www.twitter.com/davidbombal
Instagram: https://www.instagram.com/davidbombal
LinkedIn: https://www.linkedin.com/in/davidbombal
Facebook: https://www.facebook.com/davidbombal.co
Website: http://www.davidbombal.com
#linux #ccna #devnet

Sep 10, 2019 • 16min
#84: 10x Engineer: Linux commands on Cisco IOS? Wow!
You can run amazing Linux commands such as grep, line numbers, scripts and more on Cisco IOS! And without a Linux shell! Just run these directly on Classic Cisco IOS switches and routers! Use grep, man, head, tail, cat and many other Linux commands directly on Cisco IOS.
Menu:
1) IOS version required: 2:09
2) IOS XE vs Classic IOS: 2:42
3) Terminal vs config mode: 5:00
4) grep -i (ignore case): 7:39
5) line numbers on any command: 9:28
6) Sorting the output: 12:41
Previous Video in series: https://youtu.be/31XuFB50oe8
Cisco IOS Shell Configuration Guide: http://bit.ly/2kwMyYN
IOS vs IOS XE (via cows): http://bit.ly/2kcAWKq
IOS XE: https://en.wikipedia.org/wiki/Cisco_IOS_XE
You don't need a linux shell or linux virtual machine to use these commands. You can use them directly in classic Cisco IOS!
10x Engineer
CCNA
Cisco Devnet Associate
CCNP Enterprise
CCNP Security
CCNP Data Center
CCNP Service Provider
CCNP Collaboration
Cisco Certified Devnet Professional
Cisco Certified Network Professional
LPIC 1
LPIC 2
Linux Professional Institute
LX0-103
LX0-104
XK0-004
David’s details:
YouTube: https://www.youtube.com/davidbombal
Twitter: https://www.twitter.com/davidbombal
Instagram: https://www.instagram.com/davidbombal
LinkedIn: https://www.linkedin.com/in/davidbombal
Facebook: https://www.facebook.com/davidbombal.co
Website: http://www.davidbombal.com
#linux #cisco #DevNet

Sep 10, 2019 • 8min
#83: I'm Sorry.... Boson CCNA Giveaway
I'm sorry Boson. I went overboard with this CCNA giveaway! Please forgive me. Subscribe and click the bell to get notifications so you can win prizes. Change your life by becoming certified.
Winners:
Joseph O'Neill - USA
Fai Yew - Singapore
HANNINGTON OKOTH - Kenya
Nedal - Saudi Arabia
Abdikadir Mohamed - India
Free Python Course: http://bit.ly/2ko1WH2
Get Boson stuff:
David Bombal Kit: http://bit.ly/bosondavidbombal
Boson ExSim-Max Practice Exams: http://bit.ly/BosonExSim
Boson home page: http://bit.ly/2LX27oL
Boson NetSim: http://bit.ly/BosonNetSim
Send messages to Boson:
Boson Twitter: https://twitter.com/BosonSoftware
Boson LinkedIn: https://www.linkedin.com/company/boson/
Boson Facebook: https://www.facebook.com/bosonsoftware/
Inspiration:
Katherine's story: https://youtu.be/hCRjDwuuQOA
10x Engineer
Cisco Devnet Associate
CCNP Enterprise
CCNP Security
CCNP Data Center
CCNP Service Provider
CCNP Collaboration
Cisco Certified Devnet Professional
Cisco Certified Network Professional
LPIC 1
LPIC 2
Linux Professional Institute
LX0-103
LX0-104
XK0-004
Giveaway
David’s details:
YouTube: https://www.youtube.com/davidbombal
Twitter: https://www.twitter.com/davidbombal
Instagram: https://www.instagram.com/davidbombal
LinkedIn: https://www.linkedin.com/in/davidbombal
Facebook: https://www.facebook.com/davidbombal.co
Website: http://www.davidbombal.com
#ccna #WeLoveBoson #cisco

Sep 10, 2019 • 16min
#82: 10x Engineer: What? You can do this on Cisco IOS?
Wow! You can run these amazing Linux commands on Cisco IOS? And without a Linux shell? Just run these directly on Classic Cisco IOS switches and routers! Use grep, man, head, tail, cat and many other Linux commands directly on Cisco IOS.
More information here: http://bit.ly/2k3YFMG
You don't need a linux shell or linux virtual machine to use these commands. You can use them directly in classic Cisco IOS!
10x Engineer
Cisco Devnet Associate
CCNP Enterprise
CCNP Security
CCNP Data Center
CCNP Service Provider
CCNP Collaboration
Cisco Certified Devnet Professional
Cisco Certified Network Professional
LPIC 1
LPIC 2
Linux Professional Institute
LX0-103
LX0-104
XK0-004
David’s details:
YouTube: https://www.youtube.com/davidbombal
Twitter: https://www.twitter.com/davidbombal
Instagram: https://www.instagram.com/davidbombal
LinkedIn: https://www.linkedin.com/in/davidbombal
Facebook: https://www.facebook.com/davidbombal.co
Website: http://www.davidbombal.com
#linux #cisco #DevNet


