This document does not attempt to specify the interface between the Link Layer and the upper layers. However, note well that other parts of this document, particularly chapter 5, require various sorts of information to be passed across this layer boundary.
This section uses the following definitions:
The source physical address is the Link Layer address of the host or router from which the packet was received.
The information that must pass from the Link Layer to the Internetwork Layer for each received packet is:
In addition, the Link Layer also should provide:
The information that must pass from the Internetwork Layer to the Link Layer for each transmitted packet is:
In addition, the Internetwork Layer also should provide:
The Link Layer must also notify the Internetwork Layer if the packet to be transmitted causes a Link Layer precedence-related error [126.96.36.199].