hsrp cisco - how to configure it easily !!!

Hot Standby Router Protocol (HSRP) is a proprietary protocol implemented on Cisco routers and Layer 3 switches for continuity of service. HSRP is used primarily to ensure the availability of the default gateway in a subnet despite a failed router. HSRP is described in RFC 2281.

Why use HSRP ?

HSRP (Hot Standby Routing Protocol) is used to ensure high availability of the network gateway. The IP address of the gateway is configured on two different routers. One of these interfaces is active. If the active interface is no longer accessible, passive interface becomes active.

Configuring HSRP :

Configuring R1 :

Configuring R2 :

check :

In the output of this command, the active router is R2 (according to the priority given in the configuration of the interfaces).

hsrp cisco, Hot Standby Router Protocol ( HSRP ) is a proprietary Cisco protocol redundancy for fault tolerance set a default gateway , and has been described in detail in RFC 2281 hsrp cisco. 

The protocol establishes a framework between network routers to achieve default gateway failover if the primary gateway becomes unreachable [1 ] , in close association with a rapid convergence of routing protocol such as EIGRP or OSPF . For multicast packets , hsrp cisco sends hello messages to the multicast address 224.0.0.2 ( all routers ) version 1 or version 2 to 224.0.0.102 , [2 ] on UDP port 1985 to other hsrp cisco routers support the priority between routers. The main router with the highest priority can be configured as a virtual router with an IP address of the default gateway and respond to the ARP request of the machines connected to the LAN with MAC 0000.0c07.acXX where XX is the address hexadecimal group ID hsrp configuration cisco . If the primary router fails, the router with the next highest priority resume IP address of the gateway and responds to ARP requests with the same MAC address , getting a failover transparent default gateway . A simulation shows hsrp cisco election Fundamentals failover and link Active / Standby Hello, blow , packages and timers ARP response hsrp configuration cisco. 

hsrp cisco is not a routing protocol because it does not advertise IP routes or affect the routing table in any way hsrp configuration cisco. 

hsrp cisco has the ability to cause a failover if one or more ports in the router down. This can be useful for dual branch routers each with a set of the head of the link . If the serial connection of the primary router fails, the backup router to take the core functionality and therefore maintaining connectivity to the head hsrp configuration cisco.