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### Cisco 4500 with supervisor Engine 8e UID beacon LED

As you may already aware about the fact that Cisco 4500 Switch is the most selling switch of Cisco for enterprise network. Due to its performance and investment protection, many companies are using this switch for their network infrastructure. As this is a modular switch , we can insert different types of Line cards like - PoE , non PoE , SFP 1 G or 10 G etc. This switch has one module which is called Supervisor engine. We can not add more than 2 Supervisor engine in a 4500 switch.

Basically, Supervisor Engine is the main CPU or you can say brain of this switch, In network terminology, we refer it is as the Control plane as well as management plane of the 4500 switch. The Supervisor Engine comes in different model based on its performance and capabilities.

Recently, I got a chance to replace old 4500 switch with the new ones. These new 4500 switches comes with supervisor Engine 8E . This 8E is basically the name given by Cisco to this supervisor. It is the latest supervisor engine for 4500 switch at the time of writing of this post.

So I have completed with brief description of the Cisco 4500 family switches. But here I want to tell you regarding new feature of Cisco 4500 Supervisor engine 8E and that is Beacon or UID Light/LED.  UID is an acronym for  Unique Identification Light. You may heard of this in servers, storage etc. But still I want to tell you some more regarding this LED.

Think of a scenario where your data-center or campus building has around 30-40 Switches ( I never saw these many switches as they are very costly). Your are sitting in India and your second office is in Australia. You have to call one help-desk guy to see what is connected on port 2/34 of one of these switch from the group of  30 - 40 switches. Now he goes to your data center and on phone call you are telling him the location of the switch.

The easiest way to tell him is to see the bright blue light which is glowing on the switch. You can glow this Blue led via command line. The command to glow this Blue light is :

Switch# hw-module beacon on
Switch#
*Feb 16 13:12:24.418: %C4K_IOSMODPORTMAN-6-BEACONTURNEDON: Beacon has been turned on

Similarly to turn off this UID Light  following command can be used:

Switch# hw-module beacon off
 Switch#
*Feb 16 13:12:18.083: %C4K_IOSMODPORTMAN-6-BEACONTURNEDOFF: Beacon has been turned off

This is how it looks :

when beacon /UID led is on :

You are noticing that Bright Blue Light in above picture that is Beacon or UID Light.

I have also uploaded one Video on YouTube regarding Cisco 4500 Supervisor engine 8e :

Thanks guys for sparing your time to read my blog post. Soon I will come up with my next post regarding Cisco 6500 switches. Till then keep networking :)

### SuperPuTTY for EVE-NG

To use SuperPuTTY as default client for telnet in Eve-NG for multi tab console

When we click on Router or Switch in EVE-NG by default console open in CMD. Here I posting a method to use SuperPutty with EVE-NG so that you can use TAB function of SuperPutty.
You need to edit registry
Enable handling of telnet://hostname:port/ URLs on the command line. With this feature, you can now set SuperPuTTY as the default handler for Telnet URLs
If you run the Registry Editor (Start->Run->regedit.exe) and set the value in:
HKEY_CLASSES_ROOT\telnet\shell\open\command to be: "\path\to\SuperPutty.exe"
(with the full pathname of your SuperPuTTY executable)

In my case it like this :

C:\Program Files (x86)\SuperPuTTY\SuperPutty.exe %1

Second most important thing :

Select "Only allow single instance of SuperPutty to run" in SuperPutty options (Tools > Options)

And in GUI options , select Tab Text : "Dynamic"

And Finally you will get the multi tab console in Superp…

### Install Linux in Eve-NG

Install Linux in Eve-NG :
You can choose any of Linux image from the pack below and simply upload into EVE. Download your preferred image from this link:Download Linux Images Here  (This Link is Provided by EVE - NG)     2. Download your desirable image     3. Using WinSCP or FileZilla SSH (TCP 22) to your EVE and upload downloaded image to the location: /opt/unetlab/addons/qemu/     4. Using Putty or other telnet client, CLI SSH (TCP 22) to your EVE and go to location: cd /opt/unetlab/addons/qemu/    5. Unzip your uploaded image file, make sure you are using right name of uploaded image. Example for ubuntu desktop image below. tar xzvf linux-ubuntu-desktop-16.04.4.tar.gz    6. Remove raw zipped image file from EVE rm -f linux-ubuntu-desktop-16.04.4.tar.gz   7. Fix permissions /opt/unetlab/wrappers/unl_wrapper -a fixpermissions   6. Repeat this procedure for each downloaded image, expecting right image name in commands
Ready to go images recommeneded settings: IMPORTANT NOTE: Before you start Li…

### NAT Cloud in EVE-NG

NAT Cloud in EVE-NG

I want to share with you how to create a NAT cloud in the EVE-NG community edition. Essentially, this is a virtual network with a DHCP server, which will allow NAT connections over the management interface of the EVE-NG VM for Internet access.

Interface, DHCP Server and NAT First of all, we need to create a network which can be used in the topology. I’ll be using the predefined pnet9 interface (Cloud 9 network) for this, but any other interface will do. 1 2 3 ip address add192.168.255.1/24dev pnet9 echo1

### copy IOS from FTP server for cisco switch upgrade

These are the commands to copy IOS from FTP to Flash:
Filezilla SERVER :

copy ftp://username:password@ftp-server-ip/IOS-name.bin flash:

Example :

copy ftp://cisco:cisco@192.168.1.1/c2960x-universalk9-mz.152-4.E6.bin flash:

SolarWinds SFTP & SCP Server (When we need to copy IOS to Flash using Secured channel like SCP or SFTP:

copy scp://<User>:<Password>@<Server-IP>/<File-name> flash0://<File-Name>

### What is Ansible?

Ansible is a simple automation language or you can say application that can perfectly automate IT infrastructure or network infrastructure.

Ansible is a free-software platform for configuring and managing computers or network devices which combines multi-node software deployment, ad hoc task execution, and configuration management. (description taken from wikipedia)

It can also be used for network management. Like Puppet or Chef which requires agent to be installed on host system but Ansible does not require an agent on the host system. It uses SSH for transport to communicate with the host. When Ansible was first developed it was used primarily for server administration but in the last few years of development more and more network modules have been added to the software. Currently these Network vendor devices can be manage by Ansible. Current version is Ansible Ver 2.4 :

A10 Networks

Cisco ACI

Aireos

AOS

Aruba Networks

Cisco ASA

AVI

Bigswitch

Bigswitch

Citrix

Cloudengine

Cloudvision

Cumulus

Dell OS

### First look of Open NX-OS

Cisco NX-OS is the network operating system that is used in Cisco Nexus switches. These Nexus switches from Cisco are built for DATA-CENTERS. In this post I will give you a brief idea regarding the NX-OS operating system.  NX-OS has been evolved from SAN-OS which was originally developed for MDS switches by Cisco only. These MDS switches are used for storage network.

Cisco NX-OS is purely based on Micro-kernel Linux where as traditional Cisco IOS is also based on Linux but with Monolithic kernel. I will tell you the difference between these two types of kernel below in this post because it is the key difference between NX-OS and IOS.
Monolithic Kernel :
Monolithic kernel is a single large process running entirely in a single address space or memory space. It is a single static binary file. All kernel services exists and executes in the kernel address space. If one process having some problem then it will effect all other processes and may interrupt the complete kernel flow. As an ex…