Routing & Switching

December 4, 2019

CenturyLink Cloud Connect Options

Below is a good chart that shows CenturyLink’s Cloud connect options:
November 11, 2019

Cisco ISE High Level Design

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 […]
November 6, 2019

Cisco Nexus Show Commands for High CPU Usage

I ran these on our Nexus 7K switches.
November 6, 2019

Adding a new Cisco Fex – Basic Config

fex 101 pinning max-links 1 description "FEX0101" fex 102 pinning max-links 1 description "FEX0102" interface port-channel101 switchport mode fex-fabric fex associate 101 vpc 101 interface port-channel102 […]
November 6, 2019

Network Speed and Throughput Issues – Some Things to Look For

I wrote a post about using iperf, a tool to test network speed and throughput. I just want to quickly go over some things that could […]
November 5, 2019

Palo Alto Routing Verification Basics

November 1, 2019

Using iperf3 to Help Troubleshoot Speed and Throughput Issues

There are many cool options you can use with iperf but I think it’s important to use multiple simultaneous streams. I’ve seen people use this tool […]
August 15, 2019

Dasan Zhone Commands

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 21, 2019

Always be on the Lookout for Product Updates/Changes

What I mean by this, is keep an eye out for emails, alerts within the product, etc… for updates.
May 19, 2019

LACP or Aggregating Ports Explained

I’ll try to keep this simple. The easiest way to think about this is to use a highway analogy. Think of a highway that has one […]
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 […]