Our 221-C Wireless access point is directly connected to an interface. I split the IPv6 /67 subnet in half and created a /69 subnet.
IPv6 Status Available Global Unicast IPv6 Address 2600:1702:980:25e0::1 Link-local IPv6 Address fe80::eea:c9ff:feb8:84e0 IPv6 Addressing Subnet (including length) 2600:1702:980:25e0::/64 IPv6 Delegated Prefix Subnet (including length) 2600:1702:980:25ef::/64
IPv6 Delegated Prefix: 2600:1702:980:25ef/64 Start Range: 2600:1702:980:25ef:0:0:0:0 End Range: 2600:1702:980:25ef:ffff:ffff:ffff:ffff No. of host: 18446744073709551616
2600 1702 980 25ef 0000 /68 2600 1702 980 25ef 1000 /68 2600 1702 980 25ef 2000 /68 2600 1702 980 25ef 3000 /68 2600 1702 980 25ef 4000 /68 2600 1702 980 25ef 5000 /68 2600 1702 980 25ef 6000 /68 2600 1702 980 25ef 7000 /68 2600 1702 980 25ef 8000 /68 2600 1702 980 25ef 9000 /68 2600 1702 980 25ef A000 /68 2600 1702 980 25ef B000 /68 2600 1702 980 25ef C000 /68 2600 1702 980 25ef D000 /68 2600 1702 980 25ef E000 /68 2600 1702 980 25ef F000 /68
Subnet this into 32 networks? 2^5 = 32 You take the power of 5 and add it to 64 /64 + 5 = /69 You take the block to the left of 25ef You create an interesting mask 1111b nibble 8 4 2 1 16 constant 1 1 1 1 = 15 mask nibble subtract them 16 constant - 15 mask nibble 1 interesting nibble So we did the first bit. 2^4 is done. We have 2^1 to do on the next bit 8 4 2 1 16 constant 1 0 0 0 = 8 mask nibble subtract them 16 constant - 8 mask nibble 8 interesting nibble
2600 1702 980 25ef 0000 /69 2600 1702 980 25ef 0800 /69 2600 1702 980 25ef 1000 /69 2600 1702 980 25ef 1800 /69 2600 1702 980 25ef 2000 /69 2600 1702 980 25ef 2800 /69 2600 1702 980 25ef 3000 /69 2600 1702 980 25ef 3800 /69 2600 1702 980 25ef 4000 /69 2600 1702 980 25ef 4800 /69 2600 1702 980 25ef 5000 /69 2600 1702 980 25ef 5800 /69 2600 1702 980 25ef 6000 /69 2600 1702 980 25ef 6800 /69 2600 1702 980 25ef 7000 /69 2600 1702 980 25ef 7800 /69
2600 1702 980 25ef 8000 /69 2600 1702 980 25ef 8800 /69 2600 1702 980 25ef 9000 /69 2600 1702 980 25ef 9800 /69 2600 1702 980 25ef A000 /69 2600 1702 980 25ef A800 /69 2600 1702 980 25ef B000 /69 2600 1702 980 25ef B800 /69 2600 1702 980 25ef C000 /69 2600 1702 980 25ef C800 /69 2600 1702 980 25ef D000 /69 2600 1702 980 25ef D800 /69 2600 1702 980 25ef E000 /69 2600 1702 980 25ef E800 /69 2600 1702 980 25ef F000 /69 2600 1702 980 25ef F800 /69
Here is the first subnet range 2600 1702 980 25ef 0000 0000 0000 0000 to 2600 1702 980 25ef 07FF FFFF FFFF FFFF