Author: Marek Golha

Migration of SecureCRT settings between computers

Approximately every four years I change my notebook and then the madness of transferring all data and software starts.
This post is mostly for my reference – so I dont need to google it again.

All the SecureCRT user settings are located in your “Configuration” folter. To find out what is your configuration folder open you SecureCRT and go to Options >> Global Options >> General

Copy all the files and folders from the source configuration folder to the new machine configuration folder.

Original resource:

ACI simulator fabric discovery

The APIC discovers new switches that are directly connected to any switch it currently manages. Each APIC instance in the cluster first discovers only the leaf switch to which it is directly connected. When I log in to the dashboard after the initial configuration I see only one controller in the cluster:

One controller


Cisco ACI simulator upgrade (installation)

I decided to update the ACI simulator, because we received it in the version 1.0(3f) which is the version more than one year old. On the Cisco site I could not find a procedure for ACI simulator upgrade there is only one section about this in the ACI Simulator Installation Guide.

From the Cisco site I downloaded the newest and greatest version of ACI simulator – 1.2(2h). After a 2 hour break (time that I waited to download the ISO image) I logged in to CIMC (Cisco Integrated Management Console):



New tool in the lab!

Today I am welcoming a new box in the company lab – ACI simulator!

ACI simulator provides fully-featured APIC controller software, along with a simulated fabric infrastructure of leaf switches and spine switches in one physical UCS C-series server. More information can ve found in the datasheet.

Here is how the simulated topology looks like:

ACI simulator topology

Also more information can be found in the ACI simulator installation guide.


Cisco Catalyst 3850 wireless Guest access

Now it is time to configure the Guest access. In the previous blog post I created:
– VLAN for Guest access (VLAN 200)
– interface VLAN 200
– DHCP pool for Guest VLAN

First it is needed to create a Lobby Administrator Account:

3850-switch(config)#user-name lobby
3850-switch(config-user-name)#type lobby-admin 
3850-switch(config-user-name)#password lobby123
3850-switch(config-user-name)#privilege 15


Cisco Catalyst 3850 wireless configuration

This blog will be about creating some WLANs and testing that client can associate to the WLANs.


First I will create two new VLANs on the switch

3850-switch(config)#vlan 100
3850-switch(config-vlan)#name INTERNAL
3850-switch(config)#vlan 200
3850-switch(config-vlan)#name GUEST


Cisco Catalyst 3850 basic configuration for wireless

In the following posts I will try to document what I am learning about the Cisco Catalyst 3850 switch, mostly related to the wireless part of the switch configuration. Maybe some posts will be helpful to someone…



The topology is very simple. Two Catalyst 3850 switches in a stack connected to a internal network. And two Cisco 3600 access points connected to the stack.


WLAN Express Setup

From the AirOS code release you can perform the initial WLC configuration using an easy GUI wizard called WLAN Express Setup.


The WLAN Express Setup is composed from these steps:


  1. Power on your new shiny WLC 2500.
  2. Connect your PC using an Ethernet cable to Port 2 of the WLC
  3. The WLC is running an internal DHCP server and you receive an IP address from the range, in my case