ATM, Asynchronous Transfer Mode

Description Glossary RFCs Publications Obsolete RFCs


Protocol suite:ATM.
SNMP MIBs: ( ( ( (
Working groups: atommib, AToM MIB.
bmwg, Benchmarking Methodology.

RFC 2761:

A transfer mode in which the information is organized into 53 byte PDUs called cells. It is asynchronous in the sense that the recurrence of cells containing information from an individual user is not necessarily periodic. ATM is based on the ISDN model; however, unlike ISDN, ATM uses fixed length (53 byte) cells. Because of the fixed length of ATM PDUs, higher layer PDUs must be adapted into ATM using one of the four ATM adaptation layers


AAL, ATM Adaptation Layer.
(RFC 2761) The layer in the B-ISDN reference model which adapts higher layer PDUs into the ATM layer. There are four types of adaptation layers:

ABR, Available Bit Rate.
(RFC 3134) An ATM layer service category for which the limiting ATM layer transfer characteristics provided by the network may change subsequent to connection establishment. A flow control mechanism is specified which supports several types of feedback to control the source rate in response to changing ATM layer transfer characteristics.

AREQUIPA, Application REQuested IP over ATM.
(RFC 2170) A method for allowing ATM-attached hosts that have direct ATM connectivity to set up end-to-end IP over ATM connections within the reachable ATM cloud, on request from applications, and for the exclusive use by the requesting applications. This allows the requesting applications to benefit in a straightforward way from ATM's inherent ability to guarantee the quality of service (QoS).

ATM Link.
(RFC 2761) A virtual path link (VPL) or a virtual channel link (VCL).

ATM Peer-to-Peer Connection.
(RFC 2761) A virtual channel connection (VCC) or a virtual path connection (VPC).

The unit of transmission in ATM. It is a frame consisting of a 5 byte header and 48 bytes of payload.

ILMI, Integrated Local Management Interface.
(RFC 2601) Provides a mechanism for ATM-attached devices, such as hosts, routers, and ATM switches, to transfer management information. It is based on the Simple Network Management Protocol (SNMP), Version 1, and supports get, get-next, set and trap operations. The ILMI specification designates the switch side of the ATM link as the 'network side' and the host/router side of the ATM link as the ' user side.' The Service Registry MIB, which is outlined in Section 3, is implmented on the network side and is queried from the user side.


[RFC 1680] IPng Support for ATM Services.

[RFC 1754] IP over ATM Working Group's Recommendations for the ATM Forum's Multiprotocol BOF Version 1.

[RFC 1755] ATM Signaling Support for IP over ATM.

[RFC 1821] Integration of Real-time Services in an IP-ATM Network Architecture.

[RFC 1932] IP over ATM: A Framework Document.

[RFC 1946] Native ATM Support for ST2+.

[RFC 1953] Ipsilon Flow Management Protocol Specification for IPv4 Version 1.0.

[RFC 1954] Transmission of Flow Labelled IPv4 on ATM Data Links Ipsilon Version 1.0.

[RFC 2022] Support for Multicast over UNI 3.0/3.1 based ATM Networks.

[RFC 2098] Toshiba's Router Architecture Extensions for ATM : Overview.

[RFC 2149] Multicast Server Architectures for MARS-based ATM multicasting.

[RFC 2170] Application REQuested IP over ATM (AREQUIPA).

[RFC 2225] Classical IP and ARP over ATM.

[RFC 2226] IP Broadcast over ATM Networks.

[RFC 2336] Classical IP and ARP over ATM to NHRP Transition.

[RFC 2492] IPv6 over ATM Networks.

[RFC 2512] Accounting Information for ATM Networks.

[RFC 2513] Managed Objects for Controlling the Collection and Storage of Accounting Information for Connection-Oriented Networks.

[RFC 2514] Definitions of Textual Conventions and OBJECT-IDENTITIES for ATM Management.

[RFC 2515] Definitions of Managed Objects for ATM Management.

[RFC 2601] ILMI-Based Server Discovery for ATMARP.

[RFC 2602] ILMI-Based Server Discovery for MARS.

[RFC 2603] ILMI-Based Server Discovery for NHRP.

[RFC 2682] Performance Issues in VC-Merge Capable ATM LSRs.

[RFC 2684] Multiprotocol Encapsulation over ATM Adaptation Layer 5.

[RFC 2761] Terminology for ATM Benchmarking.

[RFC 2843] Proxy-PAR.

[RFC 2844] OSPF over ATM and Proxy-PAR.

[RFC 2924] Accounting Attributes and Record Formats.

[RFC 2955] Definitions of Managed Objects for Monitoring and Controlling the Frame Relay/ATM PVC Service Interworking Function.

[RFC 3035] MPLS using LDP and ATM VC Switching.

[RFC 3038] VCID Notification over ATM link for LDP.

[RFC 3108] Conventions for the use of the Session Description Protocol (SDP) for ATM Bearer Connections.

[RFC 3116] Methodology for ATM Benchmarking.

[RFC 3134] Terminology for ATM ABR Benchmarking.

[RFC 3215] LDP State Machine.

[RFC 3441] Asynchronous Transfer Mode (ATM) Package for the Media Gateway Control Protocol (MGCP).

[RFC 3606] Definitions of Supplemental Managed Objects for ATM Interface.

[RFC 4368] Multiprotocol Label Switching (MPLS) Label-Controlled Asynchronous Transfer Mode (ATM) and Frame-Relay Management Interface Definition.

[RFC 4454] Asynchronous Transfer Mode (ATM) over Layer 2 Tunneling Protocol Version 3 (L2TPv3).


Obsolete RFCs:

[RFC 1483] Multiprotocol Encapsulation over ATM Adaptation Layer 5.

[RFC 1577] Classical IP and ARP over ATM.

[RFC 1626] Default IP MTU for use over ATM AAL5.

[RFC 1695] Definitions of Managed Objects for ATM Management Version 8.0 using SMIv2.

Description Glossary RFCs Publications Obsolete RFCs