Archive for May, 2015

CDP stands for Cisco Discovery Protocol Designed by Cisco Company to help the network administartors.Using CDP admins used to collect information about both locally attached devices and remote devices.Today here in this this article we learn how to turn on or turn off cdp advertisement on routers as well as see the information of directly and indirectly connected devices.We will also learn how to see ios version of neighbor routers and directly connected routers.CDP also helps us to see the status of router interface or switch ports.To understand CDP i have designed a topology diagram in cisco packet tracer.As you can see below i have taken 5 router R1 R2 R3 R4 and R5 in below topology diagram. (more…)

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In our previous article we already have seen how to configure Cisco Router as a DHCP Server,But today in this article we will learn how to configure a Cisco Router as a DHCP Client.When we configure a Router as a DHCP Client then the Router will be able to obtain it’s interface ip address automatically from DHCP Server.

router as a dhcp client

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Here today in this tutorial we will learn how to setup and configure VLAN on cisco switches.We will learn how to create VLANs and Ports.We will also learn how to Remove VLANs and ports. Troubleshooting tips related to VLANs.How to assign vlan membership and we also learn how to convert connection link to trunk.But before configuring VLAN,I will love to inform you that you don’t need to configure VLAN untill or unless your network get so large and have so much traffic.I have seen so many people configuring and using VLAN only because the network they are working on was already using them.

Note:by default all the devices coonected with a switch are in VLAN 1.

So you dont need to do anything to use switch for your connectivity, you just have to connect your devices with switch ports and you are in network.

A VLAN is a broadcast domain formed by switches.

VLAN’s provide better performance for medium and large LAN’s.

A trunk port is a special port that runs ISL or 802.1q so that it can carry traffic from more than one VLAN. (more…)

If you are a network engineer or preparing for a network admin or networking related exam like CCNA,you must know how to control the traffic in and out of a cisco router using an access list(ACL).Once you understand the basic concept of ACL then it is very easy to configure it.Today here in this article we will learn basic concept of ACL and will also learn how to configure ACL on Cisco Router to control the traffic in a network.so if you want to understand ACL in few simple words then you can say that it is a network security protocol which denies or permits traffic between networks. Using ACL we can block or we can  allow certain end users(pc,laptop,printers etc) accessing some network resources . Today we will go through ACL configuration with an example using Packet Tracer.To understand ACL working,concept and its configuration i have taken an example in which i have taken 1 router and 6 pc.You can see the network topology diagram below. (more…)