Hi,
    If you want to use a single bit for subnetting , there by attaining =
maximum possible hosts for required two subnets , you can use it.
In this , only one bit is used for subnetting.Actually we can't use a =
single bit for subnetting with out this giving the=20
command the ip subnet-zero.

Consiedr this Class C addressing.
if you need 2 subnets with 126 hosts you can use it.

11000001.10000000.10000000.Xzzzzzzzz
In this ' X ' is the subnetting bit. zzzzzzz is the host bits.

the valid subnets are=20
11000001.10000000.10000000.0
11000001.10000000.10000000.1



Thx,
karthi


----- Original Message -----=20
  From: caifeng tang=20
  To: Cisco=20
  Sent: Tuesday, January 02, 2001 12:56 PM


  Hi.guy
  Happy new year to all of you.
  I wonder what is the ip subnet-zero, when and where use it. Would any =
=3D
  one can tell me? Thanks.

  Shelly=3D20

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  FAQ, list archives, and subscription info: =
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