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UpdatedPROPOSED STANDARDIETF stream

RFC 4884: Extended ICMP to Support Multi-Part Messages

Still current, but amended. Parts of this document are changed or extended by RFC 8335. Read both.

In plain English — editorial summary, not part of the RFC

This document redefines selected ICMP messages to support multi-part operation. A multi-part ICMP message carries all of the information that ICMP messages carried previously, as well as additional information that applications may require. Multi-part messages are supported by an ICMP extension structure. The extension structure is situated at the end of the ICMP message. It includes an extension header followed by one or more extension objects. Each extension object contains an object header and object payload. All object headers share a common format. This document further redefines the above mentioned ICMP messages by specifying a length attribute. All of the currently defined ICMP messages to which an extension structure can be appended include an "original datagram" field. The "original datagram" field contains the initial octets of the datagram that elicited the ICMP error message. Although the original datagram field is of variable length, the ICMP message does not include a field that specifies its length. Therefore, in order to facilitate message parsing, this document allocates eight previously reserved bits to reflect the length of the "original datagram" field. The proposed modifications change the requirements for ICMP compliance. The impact of these changes on compliant implementations is discussed, and new requirements for future implementations are presented. This memo updates RFC 792 and RFC 4443. [STANDARDS-TRACK]

Document record

Document ID
RFC4884
Published
April 2007
Authors
R. Bonica; D. Gan; D. Tappan; C. Pignataro
Status
PROPOSED STANDARD
Stream
IETF
Area
—
Pages
19
Also known as
—
Updates:
RFC 792, RFC 4443
Updated by:
RFC 8335

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The document record above — title, authors, date, status, stream, area, relationships, DOI and errata — is imported verbatim from the public RFC Editor index. The “in plain English” section is editorial: written by The metasystema editorial team, not part of the RFC. Where the two differ, the RFC text governs.

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canonical URL: /rfc/4884-extended-icmp-to-support-multi-part-messages