Month: November 2019
CCNA November 6, 2019

EtherChannel Exclusive

We can implement EtherChannel by bundling multiple physical ports into one or more logical Ether Channel links. The interface speed and type for a single EthernetChannel must be same. The EtherChannel provides maximum 800 Mbps full-duplex speed in case of Fast EtherChannel and or 8 Gbps speed in case of Gigabit EtherChannel between one switch […]
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CCNA November 5, 2019

What is Link Aggregation?- Exclusive Introduction

Link aggregation is the capability to produce one logical link using several physical links between two devices. Network devices and management functions care for the link aggregation group (LAG) of multiple Ethernet connections as a single link. Link aggregation allows load sharing among the multiple physical links, rather than having STP block one or more […]
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CCNA November 3, 2019

How to configure Virtual Router Redundancy Protocol

Virtual Router Redundancy Protocol (VRRP) is very similar to HSRP and can create a virtual gateway but the difference that it is not the Cisco Proprietary Protocol. It is a standard protocol defined by the IETF in RFC 3768. If you learn and understood HSRP then it is very easy for you to understand the […]
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CCNA November 3, 2019

How to Configure the Gateway Load Balancing Protocol?

Gateway Load Balancing Protocol (GLBP) is the Cisco-proprietary FHRP. It also allows load sharing between a group of redundant routers. GLBP was specially designed to overcome the limitations of HSRP and VRRP. In HSRP and VRRP, only the active/master router can forward traffic while all the standby/backup routers are idle but Gateway Load Balancing Protocol […]
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CCNA November 2, 2019

How to configure HSRP?- Exclusive Explanation

HSRP is a Cisco-proprietary First Hop Redundancy Protocol (FHRP) planned to allow for transparent failover of a first-hop IPv4 device. It allows configuring two or more routers as standby routers and only a single router as an active router at a time which ensure high network availability by providing first-hop routing redundancy for IPv4 hosts […]
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A graphic representation emphasizing ‘Understanding FHRP’ with a 3D globe surrounded by networking icons, highlighting key concepts for CCNA students.
CCNA November 1, 2019

What is FHRP? – Exclusive Explanation

When the active router fails, the First Hop Redundancy Protocol (FHRP) changes the standby router to an active router. If the active router fails, the standby router stops seeing Hello messages from the forwarding router. Then, the standby router assumes the role of the forwarding router because it assumes both the IP and MAC addresses […]
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CCNA November 1, 2019

Introduction to Router Redundancy

A virtual router is a method to prevent a single point of failure at the default gateway. To implement virtual router redundancy, several routers are configured to work jointly as a single router to the hosts on the LAN. The routers share an IP address and a MAC address and act as a single virtual […]
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Understanding default gateway limitations in computer networks
CCNA November 1, 2019

Default Gateway Limitations: Impact on Connectivity and Performance

Hosts at the access layer of a hierarchical network take advantage of the alternate default gateways. If a gateway (router interface) fails, the hosts configured with that gateway are cut off from outside networks. A method is needed to provide alternate default gateways in switched networks where two or more routers are connected to the […]
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