Router Advertisement Proxy

An IPv6 network deployment usually has one or more upstream routers to delegate IPv6 prefixes through Router Advertisement (RA) to clients. When a client connects to the network, the client starts sending Router Solicitations (RS) IPv6 requests. When clients send, upstream routers either respond with unicast (Layer 2 or Layer 3) RA or with multicast RA. Whenever a new client joins the network, a unicast or a multicast RA is sent to from the router to the client. If it is a multicast packet, then the existing clients also receive the RA, which results in traffic increase. The solution for handling the increased traffic is to enable IPv6 RA proxy to monitor the incoming unsolicited RA and RS packets.