The most obvious and seriously flawed solution is to have the end users reconfigure the default gateway address in their workstations. Many methods for addressing this problem have come and gone over the years. The three main First Hop Redundancy Protocols discussed in this chapter are HSRP Versions 1 and 2, VRRP and GLBP. Therefore, if the first default gateway router fails, the network stops working. The problem is that even if there is a second router on the segment that is also capable of being the default gateway, the end devices don't know about it. The devices on this shared network segment are usually configured with a single default gateway address that points to the router that connects to the rest of the network. They were developed to solve a common problem in shared networks such as Ethernet or Token Ring. First Hop Redundancy Protocol (FHRP) are a group of protocols that allow a router on a LAN segment to automatically take over if another one fails.
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