Networks Training

  • About
  • My Books
  • SUGGESTED TRAINING
  • HOME
  • Cisco Networking
    • Cisco General
    • Cisco IOS
    • Cisco VPN
    • Cisco Wireless
  • Cisco ASA
    • Cisco ASA General
    • Cisco ASA Firewall Configuration
  • Certifications Training
    • CCNA Training
    • Cisco Certifications
    • I.T Training
  • General
    • General Networking
    • IP Telephony
    • Network Security
    • Product Reviews
    • Software
  • Cisco Routers
  • Cisco Switches
You are here: Home / Cisco General / Cisco IOS jumps from version 12 to version 15

Cisco IOS jumps from version 12 to version 15

Written By Harris Andrea

The latest Cisco IOS version was 12.4 until recently when Cisco IOS version 15.0 was introduced. Have you noticed the jump from version 12 to 15? Do you wonder why versions 13 and 14 were skipped? Well, rumors say that Cisco avoided those version numbers because 13 is considered unlucky in the Western Culture and 14 is also considered unlucky in the Asian culture !!

As with any version upgrade, there are many new features on this release, most of them you will never use them in your life!! This is a characteristic of IOS anyway. It includes all features under the sun related with networking. It offers much flexibility, but also a lot of unnecessary stuff that you will never user them.

Before upgrading to version 15, I strongly recommend to use the Cisco Feature Navigator tool from cisco.com site in order to verify memory requirements (most important) and also to identify which features are supported.

MORE READING:  Technical Assistance Center (TAC) Vs NetPro Connection Forum

Here are the release notes for IOS 15.0M and HERE is the main page for this release.

Related Posts

  • How to Find IP Address From MAC Address on Cisco Devices
  • Cisco Command to Test a Copper UTP Ethernet Cable on a Switch
  • What is Cisco Meraki ? Some FAQ About Cisco Meraki You Need to Know
  • What is Cisco Identity Services Engine (ISE)? Use Cases, How it is Used etc
  • Readers Favorite Posts – Articles Liked by our Visitors

Filed Under: Cisco General

Download Free Cisco Commands Cheat Sheets

Enter your Email below to Download our Free Cisco Commands Cheat Sheets for Routers, Switches and ASA Firewalls.

We use Elastic Email as our marketing automation service. By submitting this form, you agree that the information you provide will be transferred to Elastic Email for processing in accordance with their Terms of Use and Privacy Policy. Also, you allow me to send you informational and marketing emails from time-to-time.

About Harris Andrea

Harris Andrea is an Engineer with more than two decades of professional experience in the fields of TCP/IP Networks, Information Security and I.T. Over the years he has acquired several professional certifications such as CCNA, CCNP, CEH, ECSA etc.

He is a self-published author of two books ("Cisco ASA Firewall Fundamentals" and "Cisco VPN Configuration Guide") which are available at Amazon and on this website as well.

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Search this site

About Networks Training

We Provide Technical Tutorials and Configuration Examples about TCP/IP Networks with focus on Cisco Products and Technologies. This blog entails my own thoughts and ideas, which may not represent the thoughts of Cisco Systems Inc. This blog is NOT affiliated or endorsed by Cisco Systems Inc. All product names, logos and artwork are copyrights/trademarks of their respective owners.

Amazon Disclosure

As an Amazon Associate I earn from qualifying purchases.
Amazon and the Amazon logo are trademarks of Amazon.com, Inc. or its affiliates.

Search

BLOGROLL

Tech21Century
Firewall.cx

Copyright © 2023 | Privacy Policy | Terms and Conditions | Hire Me | Contact | Amazon Disclaimer | Delivery Policy

0 shares