Cisco Catalyst

November 7, 2019

Cisco SSH Basic Config

service password-encryption username {NAME} privilege 15 secret {PASSWORD} ip domain-name {DOMAIN} ip ssh version 2 crypto key generate rsa 2048 line vty 0 15 transport input […]
July 1, 2019

Basic Understanding of Over-Subscription

Oversubscribing is basically when you go from many ports to fewer ports. So for example, a switch has 48 ports on it but only two uplinks. […]
June 19, 2019

Cisco Error Disabled Ports

=====Verify port status: show int status show interfaces Gi1/0/1 status
May 19, 2019

XenServer Active/Active Load Balancing

Below is something I wrong to try and explain how the active/active XenServer load balancing works.
May 19, 2019

Cisco and HP Terminology Differences

I’ve been working with HP Enclosures and Cisco devices a long time now and these always get confusing when trying to explain it to people. I […]
July 4, 2017

Cisco 3850 Upgrade IOS (Includes Stacking)

Step 1 – Copy the new image to the 3850
October 28, 2015

Cisco TACACS+ Configs for ACS (Nexus, ASR_IOS-XE, IOS, ASA, Wireless)

Below are some examples pulled from a working configuration. Enjoy!
September 22, 2015

Cisco Fiber Troubleshooting with DOM

Cisco supports DOM (Digital Optical Monitoring) which is an industry standard to capture real time operating stastics such as:
August 25, 2015

Cisco Switch Macros (2960S/X 3750,etc…)

Cisco has built in port macros where it will automatically assign specific commands to a port based on the macro you choose.
November 21, 2014

Total Output Drops on Cisco 3750x Switches

I came across a bug in IOS 12.2(53r)SE2 and it shows up in other IOS versions, where the “Total output drops” fluctuates when you use the […]
September 19, 2014

Cisco Switch Security

Below I will go over the different security threats that can happen on our network and a way to mitigate them. This is very important to […]