Archive for April, 2015

In this article we will learn how to configure a router to work as a DHCP SERVER for computers or printers or any end devices connected with different Router and located in a different network.So in below diagram you can see the topology which i have created in cisco packet tracer and now i am going to  configure Router R1 such that it will act as a DHCP SERVER for machines connected with Router R2. I mean i will configure router R1 in such a way that it can automatically assign ip addresses to PC2 and PC3 which are connected with router R2 and in a different network.Hence in this article you will see one router is acting as a dhcp server for pc connected with other router.

Here i assume that you people already know how to assign ip address on router interfaces and you have also knowledge of routing.If you are new and you don’t know how to configure ip address on router interface and you have no idea about routing then you can read my other articles in CCNA section.

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This article is just for fun to CCNA Learning students or networking learner.But with fun you can learn how to configure static routing to such topology and how to decide how many networks are in this topology.Since i have been providing CCNA TRAINING from last 5 years i have seen that so many ccna learning students get confused when i insert switches between routers.They failed to decide correct number of network and what should be the ip address of interfaces of routers.Thats why i have decided to write articles on all such topology with configurations so that students get benefited from it.If any one of you have any topology like this which is complicated and which bothers you, you can send the topology diagram to me and i will answer your question with configuration here. (more…)

This tutorial is all about LVM SNAPSHOT .Please Don’t think that it is a substitute of media backup,no it’s not.LVM Snapshot features provides the ability to  create virtual images of device at a particular instant without causing any service interruption. so you can also say that Snapshot copies of a file system are just a virtual copy and not a media backup for file system.snapshot features requires a minimal amount of storage.3-5% of the original capacity is enough to store and maintain snapshot data.

Also read:

lvm configuration in Linux.

Now what happen when change is made to original device after a snapshot is taken?

Answer is snapshot features make a copy of the changed data area as it was prior to the changes so that it can reconstruct the state of the device.


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Today in this tutorial i am going to mention the few important difference between RHEL6 and RHEL7 version.If someone had already completed RHCE certification on RHEL6 version this article will help him/her to easily learn the RHEL7 and get adjusted with this Latest RedHat Enterprise Linux OS.The major issue with new OS is that we don’t know whether our previous command will work on this OS or not or we have to learn it from start once again.Here i want you to confirm that you dont need to do RHCE Training again if you already know RHEL6.



Here in this article we will learn to troubleshoot OSPF routing protocols.In previous article we have learnt how to configure ospf routing protocol.And now in this section we will learn how to troubleshoot ospf routing protocol and to do so we have taken example lab of our previous LAB in which i have shown you ospf configuration.In this tutorial we will learn how to troubleshoot  and display ip route,routing table,ospf neighbors detail,parameters of protocols running on the routers,ospf information related to routers interfaces,ospf states,ospf events,ospf packets,border and boundary router information. (more…)

In this article we will learn how to configure ospf routing protocol  in a complex network.OSPF(Open Shortes Path First) Routing can be done on any router it is not a cisco proprietary.Since it is an open standard it will run on most of routers.OSPF uses SPF algorithm to provide a loop free topology.OSPF is also a classless protocol.OSPF is complex to configure and troubleshoot.Here we will learn ospf routing protocol configuration through an example lab.I am going to Create a topology.See below to design topology diagram in your cisco packet tracer.

OSPF routing Protocol configuration is slightly different from EIGRP and RIP.

Router(config)# router ospf process_ID
Router(config-router)# network IP_address wildcard_mask area area_value



Today in this tutorial we learn how to configure a EIGRP on a cisco router.If you are a CCNA student then i hope you very well know how to configure it and you have configured EIGRP in cisco packet tracer so many times.But here in this article i will show you how to configure EIGRP on cisco routers for a complex network. (more…)

In the world of computer  data is more important and with increase in internet users it’s increasing very fast and hence now storing data is most challenging task.Now it is not good to store your data on single drive when you know your data is important,because in case of disk failure your data will loss and it will be a huge disaster.So in place of storing data on a single disk it will be intelligent decision to store your data on multiple disk such that if one disk fails your data is still safe on second disk.

Also Read:

How to configure and Delete LVM in Linux.

There are two technology or you can say there are two methods commonly used to store data on multiple disk:

(1)One is to strore data on multiple disk through RAID and

(2)other is through LVM.

Since LVM provides us more flexblity  in handling disk and managing data,so most of us prefer configuring LVM.

In This article i have mentioned how to create and configure mirrored logical we learn the fundamental concept of LVM Mirroring and also learn to create,manage ad maintain LVM mirror in Linux in few simple steps. (more…)

In this article we learn how to create an LVM striped logical volume that stripes data accross the disks and it is very similar to RAID-O.Here we will learn all the methods to create and configure a striped LVM.Striped Logical Volume Increases the performance because with striping I/O can be done in parallel.Striping enhance the  performance by writing users data to a predetermined numbers of physical volumes in round robin fashion.It also improves the efficiency  of the data I/O for large sequential reads and writes.This Lab will help you to understand LVM configuration and also makes you to learn and grab the configuration of striped logical volume.

Also Read: How to Configure and Delete lvm in Linux (more…)