**Update: Featured image was updated to change Netflow collector instead of server 05/27/2020 Netflow is a network protocol that provides a look into the network traffic and the capability to monitor the flow of data traversing the network. Traditional Netflow and Flexible Netflow is a feature that was added to Cisco routers. Flexible Netflow is […]
Route summarization is the method of summarizing routes of multiple networks/subnets to router neighbors routing table. Summarization provides advantages for example:Saves memory – smaller routing tables reduces the memory requirementsSaves bandwidth – with less routes that need to be advertised, less data is traversed.Saves CPU cycles – smaller routing tables means less packets need to […]
Simple IPSEC VPN lab. In this lab you will connect two sites through the internet with an IPSEC VPN tunnel. Each site has its own static public IP address assigned by the ISP. IPSEC has five steps in the operation of IPSEC. Before getting to the first steps lets implement the basic configurations in order […]
RedHat Certified System Adminitrator is a systems administrator that has proven to have the sufficient knowledge to maintain and manage a Red Hat Linux enterprise environment. Since college, I have used Linux on and off. At work a few years back I was given the opportunity to take RHSA 1 and 2 courses. Each course […]
Connecting via SSH is essential in today’s networks. Cisco devices are not automatically capable to use SSH. It has to be enabled and configured. SSH (Secure Shell) is a secure method to remote access network devices as it includes both authentication and encryption. To configure SSH you will need an IOS image that supports crypto […]
Generic Routing Encapsulation (GRE) is a tunneling protocol. This protocol allows the encapsulation of the network layer protocols inside other packets (packets into packets). Tunnel allows the expansion of a network that are separated in two different locations to create a point-to-point connection between the two sites. In this lab, we will build a simple […]
Different than Static NAT, PAT (Port Address Translation) allows internal IPs to be translated into one IP via Port numbers. This allows a network to support many hosts while conserving public IP addresses. The router keeps a NAT table entry for every unique combination of the private IP addresses and port, with translation to the […]
Network address translation (NAT) is a process used in computer networks that allows private IP addresses to be translated into a public IP address. Public IP addresses are limited and in most cases most businesses will only have one public IP address assigned to them. For this reason they need to use NAT in order […]
IP addresses are configured statically or dynamically. This lab is a simple lab of a small business network. Two of the subnets will be dynamically assigning IP addresses and the third subnet for the servers will be statically assigned. The class A subnet 10.75.20.0/24 is divided into three variable length subnets. Variable length subnet mask […]
Multi-area OSPF lab using two different vendors Juniper and Cisco. This lab is a good example of how basic OSPF actions are taking on Juniper routers and in comparison Cisco routers. OSPF (Open Shortest Path First) is a routing protocol for Internet Protocol (IP) networks. OSPF is a link-state protocol. OSPF uses a shorted path first […]