
Customizing IP Services
117356-A Rev. A 4-13
Allowing an All-Zero or All-One Subnet Address
By default, for IP, an address with a subnet portion of all zeros or all ones is an
illegal address.
You can configure IP to allow an all-zero and all-one subnet address. Enable this
feature with caution, however, for it can result in an ambiguous address. For
example, if an all-zero subnet address and an all-zero broadcast address are both
valid, the router cannot distinguish an all-subnets broadcast from a directed
broadcast for the zero subnet.
Using the BCC
Navigate to the IP global prompt and enter
all-subnets enabled
For example:
ip# all-subnets enabled
ip#
Using Site Manager
Site Manager Procedure
You do this System responds
1. In the Configuration Manager window,
choose Protocols.
The Protocols menu opens.
2. Choose IP. The IP menu opens.
3. Choose Global. The Edit IP Global Parameters window
opens.
4. Set the Zero Subnet Enable parameter.
Click on Help or see the parameter
description on page A-40.
5. Click on OK. Site Manager returns you to the
Configuration Manager window.
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