Category: CCNA

Cisco Certified Network Associate certification resources
CCNA October 5, 2019

DHCPv6 Operation

Bothe of the stateless and stateful DHCPv6 operation are started with an ICMPv6 RA message from the router. The RA message may have been periodic or solicited by the device using an RS message. The devices start client and server communication when stateless or stateful DHCPv6 is indicated in the RA message. The DHCPv6 operation...
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A visual representation of SLAAC and DHCPv6 protocols, highlighting their roles in IPv6 address configuration.
CCNA October 4, 2019

SLAAC and DHCPv6 – Exclusive Details

Remember that we already discussed the introduction of the SLAAC and DHCPv6 in Router Advertisement (RA) messages. Now, we will briefly discuss both SLAAC and DHCPv6. Recall that the router sends a Router Advertisement (RA) message. The setting of the Router Advertisement (RA) message decides whether a client can obtain its IPv6 address information automatically...
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CCNA October 3, 2019

How to Troubleshoot DHCPv4 Problem

Troubleshoot DHCPv4 problem is the most important topic because of the importance of DHCP services. It is the most important service for a small, medium and large network. In this article, we will take a look at several common DHCP errors and their solution.DHCPv4 failure occurs due to multiple reasons, such as problem in operating...
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CCNA October 1, 2019

How to Configure Router as DHCPv4 Client

In some cases, we need a router to be configured as DHCPv4 clients just like a client computer. But this method is not recommended for routers in an internal network. The dynamic addressing is extremely useful for routers that connect to the Internet through an ISP. We can simply connect a router using with just...
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DHCPv4 relay process
CCNA September 30, 2019

What is DHCPv4 Relay?

In enterprise networks, dedicated servers are usually used to provide DHCP, DNS, TFTP, and FTP services. The clients are not generally on the same subnet as those servers. The clients used to broadcast messages to locate the servers and get services. Now, look at the figure below. Laptop0 is attempting to acquire an IPv4 address...
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DHCPv4 Server
CCNA September 29, 2019

How to Configure a Basic DHCPv4 Server

A Cisco router can be configured as a DHCPv4 server. The DHCPv4 server assigns and manages IPv4 addresses from specified address pools within the router to DHCPv4 clients. The steps for configuring the DHCPv4 server on Cisco routers are the following: Excluding IPv4 Addresses The router configured as the DHCPv4 server assigns all IPv4 addresses...
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CCNA September 28, 2019

Introduction to DHCPv4 Message Format

As discussed in the previous lesson, DHCPv4 clients and servers exchange messages to exchange IP address information. The format of all DHCPv4 messages is common and based on the BOOTP specification. The DHCP v4 uses UDP port numbers 67 and 68 with BOOTP.  Post 68 is the DHCPv4 source port number, while port 67 is...
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CCNA September 26, 2019

Introduction to DHCPv4 – Exclusive Explanation

Every device on the Internet, and every device on any network, needs a unique IP address. Network administrators can assign static IP addresses to routers, servers, and printers whose locations are not likely to change. The IP addresses assigned to these devices are usually not changed. The static addresses also enable administrators to manage these...
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CCNA September 22, 2019

How to Configure IPv6 ACLs

IPv6 ACLs are similar to IPv4 ACLs. If you can understand IPv4 access lists, IPv6 ACLs are not difficult for you to understand and configure. IPv4 has two types of ACLs: standard and extended. Both can either be numbered or named ACLs, but IPv6 ACLs are only one type, similar to IPv4 extended-named ACLs in...
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CCNA September 22, 2019

How to Troubleshoot ACL Errors

As discussed earlier, we can troubleshoot the ACL error using the show commands. The wrong-order ACEs are the most common ACL errors. This article will discuss some common errors in ACL configuration ACL Error – Example 1 In the figure, host 192.168.2.2 has no HTTP or HTTPS access with 192.168.4.2. When entering the show access-lists...
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