[IPv6]
| Reference | - ipv6 (Network Sorcery, Inc)
- ipv6-next-header (Copyright 2001-2005 Charles M. Kozierok. All Rights Reserved)
|
| MAC header | IPv6 header | Data ::: |
IPv6 header:
Extension Headers
Table 72: IPv6 Fragment Extension Header Format | Field Name | Size (bytes) | Description | | Next Header | 1 | Next Header: Contains the protocol number of the next header after the Fragment header. Used to link headers together as described above. | | Reserved | 1 | Reserved: Not used; set to zeroes. | | Fragment Offset | 13/8 (13 bits) | Fragment Offset: Specifies the offset, or position, in the overall message where the data in this fragment goes. It is specified in units of 8 bytes (64 bits) and used in a manner very similar to the field of the same name in the IPv4 header. | | Res | 1/4 (2 bits) | Reserved: Not used; set to zeroes. | | M Flag | 1/8 (1 bit) | More Fragments Flag: Same as the flag of the same name in the IPv4 header—when set to 0, indicates the last fragment in a message; when set to 1, indicates that more fragments are yet to come in the fragmented message. | | Identification | 4 | Identification: Same as the field of the same name in the IPv4 header, but expanded to 32 bits. It contains a specific value that is common to each of the fragments belonging to a particular message, to ensure that pieces from different fragmented messages are not mixed together. | |
!!NOTES:
1) The value of "Next header" field is 0x2C when it comes to IPv6 Fragment Extension Header.
2) The method of assembling IPv6 fragmented is the same as that of IPv4.
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