IPv6 Management Security Features
Authorized IP Managers for IPv6
Figure
FFF8 in the fourth block of the mask means that bits 3 - 15 of the block are fixed and, in an authorized IPv6 address, must correspond to the “on” and “off” settings shown for the binary equivalent 0000 in the fourth block of the IPv6 address. Conversely, bits 0 - 2 are variable and, in an authorized IPv6 address, may be either “on” (1) or “off” (0).
As a result, assuming that the seventh and eighth bytes (fourth hexadecimal block) of an IPv6 address are used as the subnet ID, only the following binary expressions and hexadecimal subnet IDs are supported in this authorized IPv6 manager configuration:
Authorized Subnet ID in Fourth | Binary Equivalent | |
Hexadecimal Block of IPv6 Address | ||
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0000 | 0000 0000 | |
0001 | 0000 0001 | |
0002 | 0000 0010 | |
0003 | 0000 0011 | |
0004 | 0000 0100 | |
0005 | 0000 0101 | |
0006 | 0000 0110 | |
0007 | 0000 0111 | |
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