In the lab I built two routers on a subnet and pointed my PCs at R1 as the default gateway. When I shut R1's interface the whole VLAN loses connectivity even though R2 is right there with a route to everything.
I know hosts usually only take ONE default gateway, so I get why R2 doesn't magically take over. But how does FHRP actually fix this? People keep saying "virtual IP and virtual MAC" and I don't really get what those are or why the hosts don't notice the failover. What problem are HSRP/VRRP actually solving here?
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