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In the first post we explored the basic configuration of BGP route aggregation with and without the summary-only keyword. In todays post our task is to explore the suppress-map keyword using the same topology used in the first post. “please refer Part1 or the series for R1&R2 configuration and network diagram“. Task1: Configure route aggregation [...]

By default all VLANs configured on a switch are allowed over all trunking interfaces. Sometimes you need to change the allowed list over a specific trunk. When a VLAN is allowed on a trunk, traffic coming from interfaces belonging to this VLAN is allowed to traverse the trunk. In our example we have R1 and [...]

The second and the most secure authentication method in PPP is CHAP. CHAP stands for challenge Handshake Authentication Protocol. How CHAP works? If CHAP is negotiated successfully during the LCP phase, the authenticator sends a challenge message to the peer. The peer responds to the challenge with a value calculated through an MD5 function. The [...]

PPP has two different authentication methods, in today’s post we are going to explore the first method which is PAP. PAP stands for Password Authentication Protocol which is a simple authentication method. PAP is considered an insecure method because the password is sent in clear text format over the PPP link and has no protection [...]

The Point-to-Point Protocol (PPP) provides a standard method for transporting multi-protocol packets over point-to-point links between two peers. In order to establish a communication link between two peers, each end of the PPP link must first send LCP packets to configure and test the data link. After the link has been established, the peer may [...]

This post is about configuring a CISCO router to act as a DHCP server in your network. Task1: Configure R1 to act as a DHCP server and provide all network information to hosts in the LAN dynamically. (R1 and R2 are directly connected via Ethernet) Server Configuration (R1) !– enable dhcp server (default) service dhcp [...]

Routers can be configured as Frame Relay switches to be used mostly in service provider or LAB environments. Lets see how you can configure frame-relay switch to use your in studies. On a Frame Relay switch, frames from a Frame Relay PVC arriving o­n an incoming interface are switched to a Frame Relay PVC o­n [...]

In this post we will explore how to limit or even stop your employees from using applications that are not related to the business during work hours. In the following example I am going to use HTTP as an example for unwanted applications, you can specify any type of application you would like to limit [...]

A trunk port is a layer 2 port that may carry traffic from multiple VLANs. Trunk ports are mostly used to connect two switches, switch and a router for inter-vlan routing or a server. Cisco switches support two types of trunking encapsulation protocols as listed below 1- ISL : frames are fully encapsulated with an [...]

Frame relay interfaces can be configured as Physical, Multipoint and point-to-point interfaces. Frame relay routing protocols and mostly all network configuration is heavily affected by interface type selected. In the following digram R1 is connected to R2 using frame-relay and we are going to explore different configuration options. Task1: Configure frame-relay PVC between R1 and [...]