Which IPv6 multicast address represents all RIP routers?

The IPv6 multicast address that represents all RIP (Routing Information Protocol) routers is FF02::9. This address is used specifically for RIP version 2, allowing multiple RIP routers on a local link to communicate updates and routing information efficiently.

Multicast addresses in IPv6 play a crucial role in facilitating communication amongst a group of devices. In the case of FTP2::9, it is defined in the IANA registry for multicast addresses, where it is explicitly assigned for the purpose of RIPv2 communications. As a result, any RIP-enabled router that is part of the same local network can listen for and respond to routing updates sent to this multicast address.

The other addresses represent different multicast groups or functions. For instance, FF02::6 is used for OSPFv3, and FF02::2 is designated for all routers on a local network. Thus, knowing the specific multicast addresses tied to protocols such as RIP is essential for understanding how routing protocols operate in an IPv6 environment.