Introduction In the previous chapter, we discussed serial connections in the WAN, we also discussed the default data link encapsulation on CISCO switches which is HDLC. In this chapter, we will look at PPP, we will discuss some of its concepts, learn how to configure PPP as well as its authentication options and finally we […]
Introduction In the last chapter, we discussed some of the concepts that make the WAN work, we briefly described some of the protocols in the WAN. In this chapter, we will discuss serial links and the physical connections we use. We will then explore the default encapsulation on CISCO routers which is HDLC and finally […]
Introduction In the previous chapters, we have been primarily focused on LAN technologies, however, as an enterprise grows, so does its networking needs. Consider company ABC, they formed in 2010 in New York, however, over the last couple of years they have grown rapidly and they now have three branches, one in Los Angeles, Miami […]
Introduction In previous chapters, we learnt how VLANs segment broadcast traffic on a switch and segment a switched network into different LANs, we also learnt how VLAN information can be transmitted to other switches in the network using VTP and how we can avoid layer two loops using STP. Consider, this, as the network administrator, […]
Overview In part 1 and 2 of this chapter, we focused on 802.1D STP, in this chapter, we continue with STP but we will focus on the different variations of STP mainly; PVSTP and RSTP. We will begin with the concepts that make these protocols different from 802.1D STP, then we will configure PVSTP and […]
Overview in the previous chapter, we looked at the role of redundancy in the network and the prevention of loops in redundant LANs using STP. In this chapter, we will look at how we can utilize the links between our switches more effectively even in a network that STP has blocked links on. We will […]
Overview In part 1 of this topic on STP, we looked at the STP concepts and discussed how STP helps in redundancy and loop prevention in LAN networks, in this second part, we will configure STP and as well as troubleshoot STP. Configuration of STP By default STP is on by default on CISCO switches, […]
Overview In the previous chapter, we looked at how we can segment a network using VLANs. In this chapter, we will discuss redundancy and how the end devices in the switched network are able to recover from a failure. We will discuss the role of STP in making sure that there are no loops as […]
Overview In part one of this chapter, we learnt how to configure VLANs on a switch. In this section, we will focus on deleting of VLANs on a switch, verification of configured VLANs as well as troubleshooting of some common VLAN problems. Deleting VLANs In other chapters, we have seen that using “no” at the […]
Overview In the previous chapter, we looked at the various concepts that make switches work. In this chapter, we will look at VLANs. We will discuss what they are, how they work and advantages of using VLANs in our LAN networks. We will also configure VLANs in our LAN networks. What are VLANs VLANs (Virtual […]