ICMPv6 Types Codes
A list of ICMPv6 packet types and codes taken from RFC4443.
ICMPv6 Types and Codes
Types 0-127 are defined as error messages, but only 0-4 are currently defined in RFC4443.
TYPE DESCRIPTION CODE
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0 Reserved
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1 Destination Unreachable
0 - no route to destination
1 - communication with destination administratively prohibited
2 - beyond scope of source address
3 - address unreachable
4 - port unreachable
5 - source address failed ingress/egress policy
6 - reject route to destination
7 - Error in Source Routing Header
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2 Packet Too Big
0 - Packet too big
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3 Time Exceeded
0 - hop limit exceeded in transit
1 - fragment reassembly time exceeded
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4 Parameter Problem
0 - erroneous header field encountered
1 - unrecognized Next Header type encountered
2 - unrecognized IPv6 option encountered
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Types 128-255 are defined as informational messages. The most commonly used messages are listed below.
TYPE DESCRIPTION CODE
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128 Echo Request
0 - echo request (IPv6 ping)
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129 Echo Reply
0 - echo reply (IPv6 ping response)
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130 Multicast Listener Query
0 - Multicast Listener Query
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131 Multicast Listener Report
0 - Multicast Listener Report
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132 Multicast Listener Done
0 - Multicast Listener Done
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133 Router Solicitation
0 - Router Solicitation
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134 Router Advertisement
0 - Router Advertisement
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135 Neighbor Solicitation
0 - Neighbor Solicitation
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136 Neighbor Advertisement
0 - Neighbor Advertisement
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See IANA allocated ICMPv6 codes for a complete list of ICMPv6 types and codes.
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