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Correct Subnet of IP base address of 10.0.10.0

Discussion in 'Networking' started by scooby_steve, Nov 23, 2004.

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  1. scooby_steve

    scooby_steve Thread Starter

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    Hi

    Could someone please confirm that the correct subnet mask for IP address 10.0.10.0 is 255.255.255.0 and not 255.0.0.0. Any help would be great. thanks in advance.

    Regards
    Steve
     
  2. bearone2

    bearone2 Banned

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    255x3.0 is the only address i see at home on the fleet and here at work for the sm.
     
  3. Jack Horner

    Jack Horner

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    The IP 10.0.10.0 is a class A private IP, the subnet for class A license is 255.0.0.0
     
  4. JohnWill

    JohnWill Retired Moderator

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    However, as long as all of the subnet masks in the network were 255.255.255.0, the fact that 10.x.x.x is a class A address would have no effect. The important thing is that all the subnet masks match...
     
  5. bearone2

    bearone2 Banned

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    what do you mean by a class a private ip? :cool:
     
  6. scooby_steve

    scooby_steve Thread Starter

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    hi guys,

    thanks for help.. the reason why i asked was that i was playing around with 2003 server and was setting up setting up a static route.

    When I put in the IP address 10.0.10.1 and subnet mask of 255.0.0.0 I got an error message saying that the IP address can not be more specific than the subnet address.

    anyways, thanks for the help.

    Regards
    Steve
     
  7. Squashman

    Squashman Trusted Advisor

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    These are the reserved IP address ranges that are not routable on the Internet. There is a Class A, B and C set of reserved IP addresses.

    http://www.faqs.org/rfcs/rfc1918.html
     
  8. Jack Horner

    Jack Horner

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    Bearone2
    Their are 5 classes of IP licenses. 3 are available to the public. Class A includes all addresses between 1.0.0.0 - 126.0.0.0 with the first octet identifying the network, and the last 3 octets identifying the local machine. these use a subnet of 255.0.0.0. Class B is between 128.0.0.0 - 191.255.0.0 and the subnet is 255.255.0.0. Class 3 is between 192.0.0.0 - 223.255.25.0 and the subnet is 255.255.255.0 Each class has a range of private addresses that can be used by for NAT purposes. These addresses are never used on the public networks (think internet) They are class A 10.0.0.0 - 10.255.255.255, B 172.16.0.0, and C 192.168.0.0 -192.168.255.255
     
  9. JohnWill

    JohnWill Retired Moderator

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    Actually, the 192.168.x.x range is a class B address range. Note that a contiguous range of 256 class C addresses is a single class B address range. :)

    From RFC 1918:

    The Internet Assigned Numbers Authority (IANA) has reserved the
    following three blocks of the IP address space for private internets:

    10.0.0.0 - 10.255.255.255 (10/8 prefix)
    172.16.0.0 - 172.31.255.255 (172.16/12 prefix)
    192.168.0.0 - 192.168.255.255 (192.168/16 prefix)

    We will refer to the first block as "24-bit block", the second as
    "20-bit block", and to the third as "16-bit" block. Note that (in
    pre-CIDR notation) the first block is nothing but a single class A
    network number, while the second block is a set of 16 contiguous
    class B network numbers, and third block is a set of 256 contiguous
    class C network numbers.
     
  10. bearone2

    bearone2 Banned

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    thanks. :cool:
     
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