Use cases for load balancing protocols

[Jhon_Cena_Fan619]

I'm currently doing my CCNA, and I am on First Hop Redundancy Protocols (like HSRP).

I'm confused because I can configure equal/unequal cost load balancing with EIGRP and OSPF (between routers).

I understand that you can create a hot standby virtual interface to balance traffic from an access switch to two routers.

But what if I was load balancing *between routers*. Why would I use first hop redundancy when I can use EIGRP? Doesn't EIGRP allow failover as well, similar first hop redundancy protocols?

I hope this makes sense. Thanks

[Deepak Kumar]

Hi,

Let's try to understand the basic difference:

FHRP: "A first-hop redundancy protocol (FHRP) is a computer networking protocol that is designed to protect the default gateway used on a subnetwork by allowing two or more routers to provide backup for that address".  This will protect your Default gateway to failover as you can configure a single default gateway at many places as your PC or Core switch to the Router or firewall. Here one IP will be virtual or Static and it will use full were you a subnet across the devices and here only one IP chosen as the gateway.

EIGRP is a routing protocol and it will provide path redundancy. Traffic can reach to the destination using the multiple paths.  

[balaji.bandi]

In a simple level :

HSRP - provides redundancy on the Gateway Redundecy level. ( this will not do your Dynamic Routing)

IGP (OSPF/ EIGRP - your case) - Provides Routes redundancy - and Dynamic Routing.