Category Archives: IP Routing Protocols

Quality Of Service QOS – Explained with Example

Understanding QoS The Provision of sufficient Quality of Service (QoS) across IP networks has become a necessary criterion in enterprise IT infrastructure of the future. It has been deemed a necessity especially for voice and the streaming of video over the network. Let us look at why the quality of service (QoS) is vital in today’s and future… Read More »

Multi-Protocol Label Switching (MPLS) Explained with Examples

What is Multi-Protocol Label Switching (MPLS)? Multiprotocol Label Switching (MPLS) is a type of network data traffic technique which carries data from one network device to the next using short path labels instead of long and complex network router lookups in a routing table. Ok…simply said; MPLS is best summarized as a middleman protocol between Layer 2 and… Read More »

Cisco Dynamic Trunking Protocol (DTP) Explained

 Understanding Dynamic Trunking Protocol (DTP) The Dynamic Trunking Protocol (DTP) is a Cisco proprietary protocol that is automatically enabled on Catalyst 2960 and Catalyst 3560 Series switches. DTP is used to negotiate forming a trunk link between two or more Cisco devices before actually forming the trunk connection. The main benefit of DTP is to increase traffic on a… Read More »

RIP Routing Loop Explained

  Split Horizon, Route Poisoning and Holddown Explained Split Horizon RIP as a distance vector protocols are also susceptible to routing loops (network problem which enables a data packet to continually being routed through the same routers over and over. The data packets continue to be routed within the network in an endless circle.). Split horizon is one… Read More »

DHCP Snooping Explained

WHAT IS DHCP SNOOPING? The Dynamic Host Configuration Protocol (DHCP) allocates IP addresses dynamically, it leases addresses to connected devices and the addresses can be reused when no longer needed. All connected Hosts and end devices that require IP addresses obtained through DHCP must communicate with a DHCP server across the LAN. DHCP snooping acts like a firewall… Read More »

What is Link Layer Discovery Protocol (LLDP)?

  Understanding LLDP and LLDP-MED The smooth running operation of the various networking devices in a LAN or switched network means that all protocols and applications are enabled and that all devices and are configured correctly. However, the larger the network gets, the more difficult it will be for the network administrator to control, manage and sort out configuration problems.… Read More »

What is Stateless DHCPv6? Explained with Examples

Stateless DHCPv6 Server and Client Auto-configuration. During the SLAAC process, the client receives information to create an IPv6 global unicast address. This includes the default gateway information from the source IPv6 address in the RA message, which is the link-local address of the router. A stateless DHCPv6 server can be used to provide information that might not be… Read More »

PPP: What is CHAP? Explained with Examples

Challenge Handshake Authentication Protocol (CHAP) Challenge Handshake Authentication Protocol (CHAP) is more secure than PAP. It involves a three-way exchange of a shared secret. During link establishment, CHAP conducts periodic challenges to make sure that the remote host still has a valid password value. While PAP basically stops working once authentication is established, this leaves the network vulnerable to… Read More »

What is GLBP? Explained with Examples

Understanding Gateway Load Balancing Protocol (GLBP) Gateway Load Balancing Protocol (GLBP) is a Cisco proprietary solution for redundancy and load balancing in an IP network. GLBP allow automatic selection and simultaneous recovery from first hop router failures. GLBP provides load balancing over multiple (router) gateways using a single virtual IP address and multiple virtual MAC addresses.  Each host… Read More »

Ways To Migrate To IPv6 Explained

Before now, most networks; if not all, runs on IPv4 infrastructure, especially if your network is using old routers and switches. To upgrade your network to be IPv6 compliant, one or two strategies listed below can be used to implement this process on your network. 1. Dual Stacking: This method of migration enables a network to run both IPv4… Read More »