The slaac only works on end users so the router would not understand the slaac

If after a switch you have a PC and a router configured to use SLAAC (Stateless Address Autoconfiguration), here is what would happen in terms of network configuration:

1. IPv6 connectivity- SLAAC is used with IPv6 to allow devices to automatically configure themselves with IPv6 addresses without the need for a DHCP server.
2. Router Announcement: The router will periodically send Router Advertisement (RA) messages through the switch to all connected devices on the network. These messages are part of the IPv6 Neighbor Discovery Protocol (NDP).
3. Automatic PC Configuration: When the PC receives a Router Advertisement, it will use the IPv6 address prefix information provided in this message to generate its own IPv6 address. This is done by taking the prefix (for example, 2001:db8::/64) and combining it with an interface identifier derived from the PC's MAC address or through random number generation, depending on the device's privacy settings. .
4. Duplicity of Address: The PC will perform an Address Duplication (DAD) check to ensure that the generated address is not in use by another device on the network. If the address is free, the PC will configure it as its IPv6 address.
5. Connectivity: Once the PC has an IPv6 address, it can begin communicating with other devices on the IPv6 network, including Internet access if the router is configured to provide it.
6. Without DHCPv6: Importantly, under SLAAC, IP addresses are auto-configured without DHCPv6 intervention, although DHCPv6 could still be used in the network for delivery of other configuration parameters (such as DNS servers) if necessary.

Therefore, in an environment with SLAAC, the network configuration process is quite automatic, allowing easy connection and configuration of devices on IPv6 networks.