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■ The primary and secondary IP addresses can be located in the same network
segment.
■ Before removing the primary IP address, remove all secondary IP addresses.
■ You can assign a secondary IP address only when the interface is not
configured to borrow an IP address through IP unnumbered or obtain one
through BOOTP, DHCP, or PPP negotiation.
Related command: display ip interface.
Example Assign Ethernet1/0 a primary IP address and a secondary IP address, with the
subnet masks both being 255.255.255.0.
<Sysname> system-view
[Sysname] interface ethernet 1/0
[Sysname-Ethernet1/0] ip address 129.102.0.1 255.255.255.0
[Sysname-Ethernet1/0] ip address 202.38.160.1 255.255.255.0 sub
ip address unnumbered
Syntax ip address unnumbered interface interface-type interface-number
undo ip address unnumbered
View Interface view
Parameter interface interface-type interface-number: Specifies an interface from which the
current interface can borrow an IP address.
Description Use the
ip address unnumbered command to configure the current interface
as IP unnumbered to borrow an IP address from another interface.
Use the
undo ip address unnumbered command to disable IP unnumbered on
the interface.
By default, the interface does not borrow IP addresses from other interfaces.
Example # Configure PPP-encapsulated interface Serial 2/2 to borrow IP address from
interface Ethernet 1/0.
<Sysname> system-view
[Sysname] interface serial 2/2
[Sysname-Serial2/2] ip address unnumbered interface ethernet 1/0