18.2.1 Relay function

The Switch forwards received IPv6 packets based on routing tables. This forwarding processing can be roughly divided into the three functions described below. The following figure provides an overview of these functions.

Figure 18-20: Introduction to IPv6 Routing Features

• Communication protocols

  Communication protocols are used to send and receive IP packets at the IPv6 layer.

• Forwarding function

  The forwarding function forwards IPv6 packets based on routing tables.

• Route control function

  The route control function exchanges routing information with other devices, determines routes, and creates routing tables.