Bad Mask for IP Address Error

  • I'm not too clear on subnetting rules and experienced an error when I tried to assign 148.26.1.176/28 to an interface on my Cisco router. Can someone please explain why it was not allowing me to assign this address to the interface? I receive an error saying:

    Bad mask /28 for address 148.26.1.176
    

    Is it outside the permissible range?

    `I'm not too clear on subnetting rules` Where sub-netting is all over the Internet, so read about it first, then you wouldn't need to ask this question

  • If you are using /28 network mask then 148.26.1.176 is the network address and therefore is not an assignable IP address for this subnet.

    For subnet 148.26.1.176/28 the range of assignable IP address is 148.26.1.177 to 148.26.1.190, as 148.26.1.176 is the network address and 148.26.1.191 is the broadcast address

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Content dated before 7/24/2021 11:53 AM