HSRP – Mise en place

Hot Standby Router Protocol (HSRP) est un protocole propriétaire de Cisco implémenté sur les routeurs et les commutateurs de niveau 3 permettant une continuité de service. HSRP est principalement utilisé pour assurer la disponibilité de la passerelle par défaut dans un sous-réseau en dépit d’une panne d’un routeur.

HSRP est décrit dans la RFC 22811.

Source : wikipedia

Exemple : 

Explication :

Avec cette configuration d’infrastructure, il y aura continuité de service si l’un des routeur tombe en panne.

Cela permet d’avoir une redondance au niveau des liens vers le F.A.I

Configuration R1

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Configuration R2

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référence :

https://www.networkstraining.com/cisco-router-hsrp-configuration/