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2.4 LINK/INTERNET LAYER INTERFACE Connected: An Internet Encyclopedia
2.4 LINK/INTERNET LAYER INTERFACE

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2.4 LINK/INTERNET LAYER INTERFACE

2.4 LINK/INTERNET LAYER INTERFACE

The packet receive interface between the IP layer and the link layer MUST include a flag to indicate whether the incoming packet was addressed to a link-layer broadcast address.

DISCUSSION

Although the IP layer does not generally know link layer addresses (since every different network medium typically has a different address format), the broadcast address on a broadcast-capable medium is an important special case. See Section 3.2.2, especially the DISCUSSION concerning broadcast storms.

The packet send interface between the IP and link layers MUST include the 5-bit TOS field (see Section 3.2.1.6).

The link layer MUST NOT report a Destination Unreachable error to IP solely because there is no ARP cache entry for a destination.


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Connected: An Internet Encyclopedia
2.4 LINK/INTERNET LAYER INTERFACE

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