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ICMPv6 Informational Message Options
(Page 5 of 6)
Redirected Header Option Format
In a Redirect message, provides
a copy of the original message (or a portion of it) that led to the
Redirect being generated. This option can be found in Table 118
and Figure 167.
Table 118: ICMPv6 Redirected Header Option Format
Field
Name
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Size (bytes)
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Description
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Type
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1
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Type: Identifies
the ICMPv6 option type. For the Redirected Header option, the
value is 4.
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Length
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1
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Length:
The length of the entire option (including the Type and Length
fields), expressed in units of 8 octets (64 bits).
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Reserved
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6
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Reserved: 6 reserved
bytes sent as zeroes.
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IP
Header + Data
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Variable
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IP Header
+ Data: As much of the original IPv6 datagram as will fit without
causing the size of the ICMPv6 error message (including its own IP header)
to exceed the minimum IPv6 maximum transmission unit (MTU) of 1280 bytes.
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