CLNP, Connectionless Network Protocol, ISO 8473

Protocol suite:	ISO.
Protocol type:	Connectionless network layer protocol.
SNMP MIBs:
Working groups:
Links:

RFC 1561:

ISO CLNP is a datagram network protocol. It provides fundamentally the same underlying service to a transport layer as IP. CLNP provides essentially the same maximum datagram size, and for those circumstances where datagrams may need to traverse a network whose maximum packet size is smaller than the size of the datagram, CLNP provides mechanisms for fragmentation (data unit identification, fragment/total length and offset). Like IP, a checksum computed on the CLNP header provides a verification that the information used in processing the CLNP datagram has been transmitted correctly, and a lifetime control mechanism ("Time to Live") imposes a limit on the amount of time a datagram is allowed to remain in the internet system. As is the case in IP, a set of options provides control functions needed or useful in some situations but unnecessary for the most common communications.

Type	Description	References
30	Echo-Request	RFC 1575
31	Echo-Response	RFC 1575

Glossary:

RFCs:

[RFC 986] WORKING DRAFT Guidelines for the use of Internet-IP addresses in the ISO Connectionless-Mode Network Protocol.

[RFC 1069] Guidelines for the use of Internet-IP addresses in the ISO Connectionless-Mode Network Protocol.

[RFC 1162] Connectionless Network Protocol (ISO 8473) and End System to Intermediate System (ISO 9542) Management Information Base.

[RFC 1238] CLNS MIB for use with Connectionless Network Protocol (ISO 8473) and End System to Intermediate System (ISO 9542).

[RFC 1347] TCP and UDP with Bigger Addresses (TUBA), A Simple Proposal for Internet Addressing and Routing.

[RFC 1526] Assignment of System Identifiers for TUBA/CLNP Hosts.

[RFC 1561] Use of ISO CLNP in TUBA Environments.

[RFC 1574] Essential Tools for the OSI Internet.

Obsoletes: RFC 1139.

[RFC 1575] An Echo Function for CLNP (ISO 8473).

Obsoletes: RFC 1139.

[RFC 1706] DNS NSAP Resource Records.

Obsoletes: RFC 1348, RFC 1637.

[RFC 1768] Host Group Extensions for CLNP Multicasting.

Publications:

Obsolete RFCs:

[RFC 1139] An Echo Function for ISO 8473.

Obsoleted by: RFC 1574, RFC 1575.

[RFC 1348] DNS NSAP RRs.

Obsoleted by: RFC 1706.
Updates: RFC 1034, RFC 1035.