I need solution for router hardware redundancy. Two routers 2900 series with same configuration, toward same ISP. If one fail second to do failover. Can HSRP do this? Can outside interfaces be set toward same ISP with same public ip address on outside interfaces?
HSRP can provide first hop redundancy on your LAN. There are options to change the active router for things like router or link failure.
Each outside interface needs its own IP address from the ISP. Each inside interface needs its own IP address plus one more for the virtual IP address.
hsrp and glbp are the good soultions for router redundancy