CCNP

Implementing Basic Route Redistribution

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redistribution example

Redistribution is a great way to work with a lot of routing protocols. Now it is time to configure “route redistribution” with an example ! And surely step by step. Please check the figure below : 1) Configure EIGRP and OSPF with no summarization. Loopbacks of the router 3 must be configured point-to-point. 2) Activate full redistribution […]

CCNP

Identity Based Network Services (802.1x)

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802.1x

It is time to talk about 802.1x. What is 802.1x’s answer is simply an IEEE standard ! That provides connection point oriented network access control. 802.1x is a part of the 802.1 standard. 802.1x provides identity authentication to the devices that want to set a LAN or WLAN. Authentication operation steps are below : Initialization […]

CCNP

How VLAN Access Lists Work And Configuration Of VACL

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vacl

We talked about many security techniques before, as you know methods like access-lists, pvlans and etc. are some of them. And VLAN Access Lists are filtering the traffic over VLANs. VACLs have almost same logic with route-maps ( i will write a long article about route-maps too later ). If you want to use VLAN […]

CCNP

How To Configure Ospf Over NBMA Networks ?

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ospf over nbma example

In this article we will examine configuring OSPF over NBMA networks. To understand “How To Configure Ospf Over NBMA” deeply, we will examine a configuration example together step by step. 1) Configure OSPF for the figure above. Use the default OSPF network mode for the networks in Area 0 and Area 24. Configure the interface of Router 3 […]

CCNP

HSRP (Hot Standby Router Protocol) Explained

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hsrp

Nowadays, it is very important to keep your network alive all the time. To not to face with that boring scenarios it is mandotary to set up a network which is redundant. Here we have some protocols to make our network redundant, they are HSRP, VRRP and GLBP. First we will talk about HSRP – Hot Standby Router […]

CCNP

What Is Etherchannel and How It Works ?

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etherchannel

Our new subject is : Etherchannel ! We are gonna talk about “what is etherchannel” , “how it works” and etc. First of all etherchannel is a great way to  make load balancing. As you can see from the figure above, etherchannel combines the switch ports and works it like a one link. There are […]

CCNP

GLBP (Gateway Load Balancing Protocol) Explained

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After VRRP and HSRP , our last redundancy protocol is Gateway Load Balancing Protocol (GLBP). GLBP is a Cisco proprietary protocol like HSRP, but has differences surely and we will talk about how Gateway Load Balancing Protocol (GLBP) works, what is Gateway Load Balancing Protocol (GLBP). Biggest difference of Gateway Load Balancing Protocol (GLBP) is load balancing ! That’s […]

CCNP

EIGRP Stub And Summary Routes Explained

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eigrp stub

Now it is time to check “EIGRP Stub” and design options of EIGRP. BB#debug ip eigrp packets BB#debug ip eigrp query BB#debug ip eigrp reply When primary route fails, EIGRP automatically switches to the backup route. If the rule ” AD < Successor’s FD ” fails, query messages are sent. In the query message, it […]

CCNP

EIGRP Over NBMA Configuration Basics

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eigrp over nbma example

This configuration is an example of EIGRP Over NBMA configuration. EIGRP Over NBMA is a form of EIGRP configuration. 1) Configure EIGRP with AS 25. 2) Each router should make summarization to decrease the routing table. 3) Make the configuration for that EIGRP uses %30 more bandwith due to default config. ( On the serial […]

CCNP

DHCP Snooping , VLAN Hopping And STP Attacks

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dhcp snooping

There are many ways that hackers use. So we need to prepare for them. In this article we are gonna shortly talk about DHCP Snooping , VLAN Hopping And STP Attacks. I would love to talk more about these guys but i think these subjects are being deeply examined for CCNP Security certification. VLAN HOPPING * At […]