Understanding Switch Trunk Ports: Cisco vs. Dell and Other Vendors
In modern networking, switch trunk ports play a vital role in ensuring smooth communication across VLANs (Virtual Local Area Networks). While the concept of a trunk port is consistent across networking vendors, the implementation details can vary. In this blog …
What is a Data Center Interconnect
As you become more familiar with Cisco Data Center terminology, you will encounter the term DCI. A DCI is a Data Center Interconnect. DCIs typically fall into three categories. Dark Fiber (CWDM/DWDM)MPLS Layer 2 VPN (VPWS/VPLS)MPLS Layer 3 VPN A …
Packets Down Range #31: Hedge Podcast, Microsoft, Cisco, Arista.
It’s been a busy almost spring so far. One of the highlights of the past few months was being invited to do a Hedge Podcast with Russ White and Tom Ammon. It was a great time. We talked about the …
How to prepare for the Cisco Certified Network Associate (CCNA) exam
Before diving into the study strategies, it’s essential to grasp the fundamentals of the CCNA exam: Now, let’s explore a comprehensive study approach for success in the CCNA exam: Gather Study MaterialsAcquire the necessary study materials, including official Cisco CCNA …
What is BGP next-hop-self and why you should care?
In this blog post, we’ll demystify the concept of next-hop-self in BGP, why it’s crucial, and how it affects routing decisions. What Is Next-Hop-Self in BGP? In BGP, the “next hop” is the IP address used to reach a particular …
Packets Down Range #17:Cogent Wavelengths, earnings news, DDoS
I am fresh back from Nanog #87 in Atlanta. Great times! Thank you to those who gave me some lines on this week’s news articles. Keep those submissions coming. By now, everyone who has signed up should be receiving this …
Auto mapping your Cisco Network
This content is for Patreon subscribers of the j2 blog. Please consider becoming a Patreon subscriber for as little as $1 a month. This helps to provide higher quality content, more podcasts, and other goodies on this blog.To view this …
Running Docker inside Cisco Catalyst 9000
https://blogs.cisco.com/networking/application-hosting-on-catalyst-9000-series-switches Catalyst 9000 series of switches, Cisco’s flagship enterprise switching portfolio delivering Intent Based Networking (IBN) runs a modern, modular and model-driven operating system stack, Cisco IOS® XE. Powered by Intel x86 CPU, Catalyst 9000 series now supports secure Docker™ …
Globe Ed Network Fundamentals
https://www.globed.net/courses/back-to-networking-basics In this Networking Basics Workshop we will be learning the following: REFERENCE MODELSETHERNET STANDARDS AND SPECSTRANSMISSION METHODSTOPOLOGIES NETWORKING DEVICESIPV4 ADDRESSINGHEX CONVERSIONCISCO ROUTER AND SWITCH BASICCISCO ROUTER AND SWITCH CONFIGURATIONLAYER 2 SWITCHING LAYER 3 ROUTINGLAYER 3 ROUTING USING L3 SWITCHING RECORDINGS …
Cisco Syslog severity levels
For those of you implementing Syslog triggers and such the following list will be helpful in filtering and classifying Syslog entries. 0 – Emergency 1 – Alert 2 – Critical 3 – Error 4 – Warning 5 – Notice 6 …