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Gateway Load Balancing Protocol (GLBP)

The Gateway Load Balancing Protocol (GLBP) is the last first-hop redundancy protocol (FHRP) we discuss in this section. It serves the same function as the HSRP and VRRP—it provides redundancy for the default gateway.

Virtual Router Redundancy Protocol (VRRP)

VRRP allows multiple routers to operate as a single virtual router, which hosts can then use as their default gateway.

Lab #4.1 - Configuring HSRP

In this lesson, we will demonstrate how to configure HSRP on Cisco routers. At the end of the lesson, you can download the EVE-NG file and practice the lab in your home virtualized environment.

Hot Standby Router Protocol (HSRP)

Hot Standby Router Protocol (HSRP) is a FHRP protocol that enables two or more routers to work together, acting as a highly available default gateway to local hosts. HSRP operates in an active/standby model and implements the concept of a Virtual IP address (VIP)

Why do we need a First Hop Redundancy Protocol?

This lesson begins our journey into First-Hop Redundancy Protocols (FHRP). The term FHRP refers to a category of solutions that includes three options: HSRP, VRRP, and GLBP, with the most popular being the Hot Standby Router Protocol (HSRP).

Congestion Avoidance

Congestion Avoidance is a QoS technique that aims to minimize network congestion (as the name implies) by proactively discarding certain packets used in TCP connections.

Queuing and Scheduling

Learn how network devices use queues, buffers, and scheduling (FIFO, PQ, WFQ, LLQ) to manage packets and ensure fair, efficient, and prioritized traffic flow.

Policing and Shaping

Policing and Shaping are QoS techniques used to manage and control bandwidth usage. Both QoS features monitor the traffic rate of an interface and compare it to the configured rate limit called CIR (Committed Information Rate). When the traffic exceeds the CIR value, they perform a pre-configured action.

Lab #3.1 - Marking traffic at the access

QoS is not a single tool. It involves multiple QoS features and capabilities that work together to achieve the common goal of prioritizing business-important over business-irrelevant traffic. That's why QoS is one of those network technologies that can only be learned and understood well with practice.

The Modular QoS CLI (MQC)

This lesson demonstrates how we configure Quality of Service (QoS) on Cisco devices using the modular QoS CLI (MQC) framework.