Invalid Subnet mask
Invalid Subnet mask.
Valid subnet mask addresses are 0.0.0.0 or an address that consists of consecutive bits set to 1, starting with the high bit of the first octet, bit 31 of the address through bit 1 of the address.
When a bit is set to 0, set all remaining bits in the address to 0.
Always set Bit 0 in the address to 0.
Valid subnet mask addresses include:
- 0.0.0.0
- 128.0.0.0
- 192.0.0.0
- 224.0.0.0
- 240.0.0.0
- 248.0.0.0
- 252.0.0.0
- 254.0.0.0
- 255.0.0.0
- 255.128.0.0
- 255.192.0.0
- 255.224.0.0
- 255.240.0.0
- 255.248.0.0
- 255.252.0.0
- 255.254.0.0
- 255.255.0.0
- 255.255.128.0
- 255.255.192.0
- 255.255.224.0
- 255.255.240.0
- 255.255.248.0
- 255.255.252.0
- 255.255.254.0
- 255.255.255.0
- 255.255.255.128
- 255.255.255.192
- 255.255.255.224
- 255.255.255.240
- 255.255.255.248
- 255.255.255.252
- 255.255.255.254
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