IPv6 RA Guard provides support to the administrator to block or reject unwanted RA Guard messages that arrive at the network switch platform. The routers use Router Advertisements (RAs) to announce themselves on the link. The RA Guard feature analyzes these RAs and filters out bogus RAs sent by unauthorized routers. The RA Guard feature compares configuration information on the Layer 2 device with the information found in the received RA frame. After the Layer 2 device validates the content of the RA packet against the configuration, it forwards the RA to its destination. If the RA packet validation fails, the RA is dropped.