Category: CCNA

Cisco Certified Network Associate certification resources

Network diagram illustrating EIGRP passive-interface configuration with three routers and connected devices.
CCNA January 7, 2020

How to Configure EIGRP Passive-Interface

A passive interface is used in all routing protocols, where we can stop sending updates from a specific interface. The behavior varies from o­ne protocol to another. In EIGRP, using the passive-interface, we stop sending outgoing hello packets; therefore, the router cannot form any neighbor adjacencies via the passive interface. This behavior stops both outgoing...
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CCNA January 6, 2020

The Network Command – Exclusive Explanation

The network command has the same function as in all IGP routing protocols. It enables any interface on this router that matches the network address. It enables EIGRP routing on an interface, using the command in router configuration mode and enter the classful network address for each directly connected network. The command syntax is as...
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CCNA January 5, 2020

Mastering EIGRP Router ID Configuration

EIGRP router ID is a 32-bit unique identifier identifying the router in the EIGRP domain. The router ID (RID) is represented in the same way as the IPv4 address. The router ID is used both in EIGRP and OSPF, while the role of the router ID is more significant in OSPF. EIGRP automatically selects the...
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CCNA January 4, 2020

Introduction to “Router EIGRP” Command

The “router” command in global configuration mode is an important command for start configuration of any dynamic routing protocol. The topology displayed in Figure 1 is used to configure and demonstrate the EIGRP routing protocol. Figure 2 (marked with a red triangle) illustrates the “router ?” with question marks to demonstrate the list of dynamic...
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Autonomous system numbers
CCNA January 4, 2020

Introduction to Autonomous System Numbers (ASNs)

Autonomous system numbers (ASNs) is a unique identifier that is globally available and allows its autonomous system to exchange routing information with other systems. An Internet Assigned Numbers Authority (IANA) globally assigned autonomous system is a group of networks under the administrative control of a single body that presents a common routing policy to the...
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CCNA January 3, 2020

EIGRP Packet Types – Exclusive Explanation

EIGRP uses 5 different types of packet in communication with its neighbours. EIGRP packets are sent with reliable or unreliable delivery and can be sent as a unicast, multicast, or sometimes both. EIGRP packet types are also called EIGRP packet format or EIGRP messages. The details of the EIGRP packets are the following: EIGRP Hello...
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CCNA January 2, 2020

What is a Reliable Transport Protocol (RTP)

EIGRP uses a Reliable Transport Protocol (RTP) to deliver and receive EIGRP packets instead of TCP and UDP. Reliability is a key feature of EIGRP, and it is designed to enable fast update delivery and data reception tracking.EIGRP was designed as a network-layer independent routing protocol. This allows EIGRP to be used for protocols other...
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PDM
CCNA January 2, 2020

What is Protocol Dependent Module (PDM)

EIGRP uses a protocol-dependent module (PDM) for routing with several different protocols including IPv4 and IPv6. EIGRP also used PDMs to route Novell’s IPX and Apple Computer’s AppleTalk network-layer protocols. The protocol-dependent module (PDM) is also responsible for carrying information from the routing table to the topology table. protocol-dependent module (PDM) is also responsible for...
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EIGRP
CCNA January 1, 2020

Introduction to EIGRP – Exclusive

Enhanced Interior Gateway Routing Protocol (EIGRP) was introduced as a distance-vector routing protocol in 1992. It was originally designed to work as a Cisco proprietary protocol on Cisco devices only. In 2013, Enhanced Interior Gateway Routing Protocol became a multi-vendor routing protocol. Enhanced Interior Gateway Routing Protocol is an advanced version of IGRP that lets...
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CCNA December 31, 2019

How to Verify Multiarea OSPF

The majority of the command for multiarea OSPF verification is the same as the command we already used in the verification of single area OSPF. The command, “show ip ospf neighbor”, “show ip ospf” and show ip ospf interface are the same command. The following command specifically includes the information of multiarea OSPF. show ip...
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