IP Router Configuration
7750 SR OS Router Configuration Guide Page 103
secondary
Syntax secondary {[ip-address/mask | ip-address netmask]} [broadcast {all-ones | host-ones}]
[igp-inhibit]
no secondary ip-addr
Context config>router>interface ip-int-name
Description Use this command to assign up to 16 secondary IP addresses to the interface. Each address can be
configured in an IP address, IP subnet or broadcast address format.
ip-address — The IP address of the IP interface. The ip-address portion of the address command
specifies the IP host address that will be used by the IP interface within the subnet. This address
must be unique within the subnet and specified in dotted decimal notation.
Values 1.0.0.0 — 223.255.255.255
/ — 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— 32. Note that a mask
length of 32 is reserved for system IP addresses.
Values 1 — 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. Note that a mask of 255.255.255.255 is reserved for system IP
addresses.
Values 128.0.0.0 — 2 55.255.255.255
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