### 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 :
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 :

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:

### Radius and Tacacs server for Authentication

Radius and Tacacs server for Authentication
When we study for certification regarding Cisco, we encounter topic like Radius or Tacacs Server many times. You all know what are these and when to use them. But will it be beneficial to setup Radius or Tacacs authentication in real production network ?

Suppose you have 20 - 30 devices and there are three network administrator handling those devices in your company. One day you get a news that one of the network engineer is leaving an organization. To comply with company's security policy, you need to delete his/her Login credentials from all 20 - 30 devices. It hardly takes 20 - 30 Min to do that. No problem ! All is well till now.

Now imagine a different scenario in which you are working in even bigger organization which has around 2000 devices and has large network team around 15 - 20 Network admins. Each one of them has different access permissions on the network devices and some of them only have access permissions to limited numb…

### Network Engineer should Learn Python

Network Engineer should Learn Python
Suppose you are a Network Administrator or Engineer in a company which has 20 - 30 Network devices like Cisco , Juniper or some other vendors devices. How would you manage these Devices ? Yes you do Telnet or SSH to these devices and do your configuration etc. This is a happy happy situation.
Now lets consider second scenario. Suppose you are handling multi-site company with different offices which are  distributed geographically across country and world too. You have to manage around 1000 different network devices spread around different locations. One day your boss come to you and ask you to change or add new NTP server to these network devices. Aaahhh... Yes he actually means to these 1000 devices!!! Now what will be your first reaction ? How it is possible to Login to each network device and enter the NTP command ? Yes it is possible to just grab your chair and SSH to each and every device manually and put NTP command. What an idiotic and boring…

### IP SLA tracking in Route MAP

Examples

The following configuration sample shows a configuration used to track an object:

! Configure the objects to be tracked.
! Object 123 will be up if the router can ping 10.1.1.1.
! Object 124 will be up if the router can ping 10.2.2.2.
ip sla monitor 1
type echo protocol ipicmpecho 10.1.1.1
ip sla monitor schedule 1 start-time now life forever
!
ip sla monitor 2
type echo protocol ipicmpecho 10.2.2.2
ip sla monitor schedule 2 start-time now life forever
!
track 123 rtr 1 reachability
track 124 rtr 2 reachability
!
! Enable policy routing using route-map alpha on Ethernet 0.
interface ethernet 0