IP Router Configuration
Router Configuration Guide 187
/ — The forward slash is a parameter delimiter that separates the ip-address portion of the IP
address from the mask that defines the scope of the local subnet. No spaces are allowed
between the ip-addr, the “/” and the mask-length parameter. If a forward slash does not
immediately follow the ip-addr, a dotted decimal mask must follow the prefix.
mask-length — The subnet mask length when the IP prefix is specified in CIDR notation. When
the IP prefix is specified in CIDR notation, a forward slash (/) separates the ip-address from
the mask-length parameter. The mask length parameter indicates the number of bits used for
the network portion of the IP address; the remainder of the IP address is used to determine the
host portion of the IP address. Allowed values are integers in the range 1 to 32. A mask length
of 32 is reserved for system IP addresses.
Values 1 to 32
mask — The subnet mask in dotted decimal notation. When the IP prefix is not specified in CIDR
notation, a space separates the ip-addr from a traditional dotted decimal mask. The mask
parameter indicates the complete mask that will be used in a logical ‘AND’ function to derive
the local subnet of the IP address. A mask of 255.255.255.255 is reserved for system IP
addresses.
Values 128.0.0.0 to 255.255.255.255
broadcast {all-ones | host-ones} — The optional broadcast parameter overrides the default
broadcast address used by the IP interface when sourcing IP broadcasts on the IP interface. If
no broadcast format is specified for the IP address, the default value is host-ones, which
indicates a subnet broadcast address. Use this parameter to change the broadcast address to
all-ones or revert back to a broadcast address of host-ones.
The all-ones keyword following the broadcast parameter specifies that the broadcast address
used by the IP interface for this IP address will be 255.255.255.255, also known as the local
broadcast.
The host-ones keyword following the broadcast parameter specifies that the broadcast
address used by the IP interface for this IP address will be the subnet broadcast address. This
is an IP address that corresponds to the local subnet described by the ip-addr and the mask-
length or mask with all the host bits set to binary 1. This is the default broadcast address used
by an IP interface.
The broadcast parameter within the address command does not have a negate feature, which
is usually used to revert a parameter to the default value. To change the broadcast type to
host-ones after being changed to all-ones, the address command must be executed with the
broadcast parameter defined.
The broadcast format on an IP interface can be specified when the IP address is assigned or
changed.
This parameter does not affect the type of broadcasts that can be received by the IP interface.
A host sending either the local broadcast (all-ones) or the valid subnet broadcast address
(host-ones) will be received by the IP interface.
igp-inhibit — The secondary IP address should not be recognized as a local interface by the
running IGP.
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