IEEE 802.1H-1995

New IEEE Standard - Inactive-Withdrawn. Administratively withdrawn January 2011.

Extensions to the behavior of ISO/IEC 10038 (IEEE 802.1D) media access control (MAC) Bridges, in order to facilitate interoperability in bridged local area networks (LANs) comprising CSMA/CD networks interconnected with other types of LAN using MAC Bridges, where the CSMA/CD networks contain a mixture of ISO/IEC 8802-3 and Ethernet V2.0 end stations, are specified.

Additionally, guidelines are provided for the development of nonstandard 802 protocols, with particular emphasis on:

• Conversion of existing Ethernet protocols
• The behavior to be expected from a Bridge, for the purpose of avoiding future incompatibilities.

For the purpose of facilitating the interoperability of ISO/IEC 10038 MAC Bridges and end stations in bridged LANs comprising CSMA/CD networks containing a mixture of ISO/IEC 8802-3 and Ethernet end stations and other types of LANs, this Technical Report specifies extensions to the behavior of MAC Bridges.

To this end this Technical Report:

• Extends the Bridge service interface model to support multiple MAC services on a single LAN and to add a Bridge-Tunnel service interface.
• Defines the Selective Translation Algorithm used by a Bridge to convert between Ethernet and ISO/IEC 8802 frame formats.
• Defines the protocols used by a Bridge to convey Ethernet frames across ISO/IEC 8802 LANs, the Bridge-Tunnel Encapsulation Protocol, and the RFC1042 Encapsulation Protocol.

Additionally, for the purpose of avoiding future incompatibilities, this Technical Report provides guidelines for the development of nonstandard ISO/IEC 8802 protocols, with particular emphasis on conversion of existing Ethernet protocols and the behavior to be expected from a Bridge.

The following are the express goals of this Technical Report:

• Preservation of full interoperability between ISO/IEC 8802 LANs.
• Enhancement of interoperability between ISO/IEC 8802 LANs and nonstandard LANs (i.e., Ethernet).
• Encouragement of vendors to migrate to ISO/IEC 8802-based protocols.
• Preservation of existing interoperability mechanisms between ISO/IEC 8802 LANs and nonstandard LANs.
• Engendering the design of new ISO/IEC 8802 protocols, and the migration of existing Ethernet protocols, in a fashion that is compatible with Bridges and ISO/IEC 8802 end stations.

The following is not a goal of this Technical Report: Providing communication between two end stations, with the same physical LAN protocol, which are otherwise not capable of communicating when attached to a single LAN.