a unicast address that does not belong to the node an anycast address implemented by the node, or (b) If the message is a response to a message sent to any other Node's unicast addresses, the Source Address of the reply MUST be (a) If the message is a response to a message sent to one of the If the node has more than one unicastĪddress, it MUST choose the Source Address of the message as follows: Source and Destination IPv6 Addresses in the IPv6 header beforeĬalculating the checksum. Message Source Address DeterminationĪ node that originates an ICMPv6 message has to determine both the To allow the originator of a packet that has resulted in an ICMPv6Įrror message to identify the upper-layer protocol and process thatĢ.2. Inclusion of, at least, the start of the invoking packet is intended Message types 1 through 4 and informational message types 128 and Sections 3 and 4 describe the message formats for the ICMPv6 error These expanded type values could assign fields in the message body Existing implementations would ignore the newĪssignments as specified in Section 2.4, (b). The type equals 127 or 255, the code field should be used for the newĪssignment. Would not cause any problems with current implementations is that if Value range if there is a shortage in the future. Type values 127 and 255 are reserved for future expansion of the type Obtain real allocations as defined in Section 6. Any wide-scale and/or uncontrolled usage should It isĮxpected that multiple concurrent experiments will be done with the Type values 100, 101, 200, and 201 are reserved for privateĮxperimentation. This document defines the message formats for the following ICMPv6ġ Destination Unreachable (see Section 3.1)ġ27 Reserved for expansion of ICMPv6 error messagesĢ55 Reserved for expansion of ICMPv6 informational messages Messages have message types from 128 to 255. Thus,Įrror messages have message types from 0 to 127 informational Zero in the high-order bit of their message Type field values. Error messages are identified as such by a ICMPv6 messages are grouped into two classes: error messages and The checksum field is used to detect data corruption in the ICMPv6 The code field depends on the message type. Its valueĭetermines the format of the remaining data. The type field indicates the type of the message. The ICMPv6 messages have the following general format:Ġ 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 (This isĭifferent from the value used to identify ICMP for IPv4.) Header value of 58 in the immediately preceding header. The ICMPv6 header is identified by a Next IPv6, and the base protocol (all the messages and behavior requiredīy this specification) MUST be fully implemented by every IPv6 node.Įvery ICMPv6 message is preceded by an IPv6 header and zero or more Processing packets, and to perform other internet-layer functions, ICMPv6 is used by IPv6 nodes to report errors encountered in "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in thisĭocument are to be interpreted as described in. The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", This document obsoletes RFC 2463 and updates RFC 2780 Routing and Addressing specification applies to this Terminology defined in the IPv6 specification and the IPv6 Neighbor Discovery messages, subject to the general rulesįor ICMPv6 messages given in Section 2 of this document. Otherĭocuments may also introduce additional ICMPv6 message types, such as Procedures are described in other documents (e.g., ). Messages to achieve functions like Path MTU discovery these It does not describe the procedures for using these The resulting protocol is called ICMPv6 and has an IPv6 Message Protocol (ICMP) as defined for IPv4, with a number The Internet Protocol version 6 (IPv6) uses the Internet Control Procedure for New ICMPV6 Type and Code Value Assignments. Authentication and Confidentiality of ICMP Messages. RFC 4443 ICMPv6 (ICMP for IPv6) March 2006ġ. Internet Control Message Protocol for Internet Protocol version 6 In ICMPv6 (Internet Control Message Protocol). This document describes the format of a set of control messages used Distribution of this memo is unlimited.Ĭopyright (C) The Internet Society (2006). Official Protocol Standards" (STD 1) for the standardization stateĪnd status of this protocol. Please refer to the current edition of the "Internet Internet community, and requests discussion and suggestions for This document specifies an Internet standards track protocol for the Internet Control Message Protocol (ICMPv6) for the Internet Protocol Version 6 (IPv6) Specification
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