HPE 5920 series

27
ip address unnumbered
Use ip address unnumbered to configure the current interface as IP unnumbered to borrow an IP
address from the specified interface.
Use undo ip address unnumbered to disable IP unnumbered on the interface.
Syntax
ip address unnumbered interface interface-type interface-number
undo ip address unnumbered
Default
The interface does not borrow IP addresses from other interfaces.
Views
Tunnel interface view
Predefined user roles
network-admin
Parameters
interface interface-type interface-number: Specifies an interface from which the current interface
can borrow an IP address.
Usage guidelines
Typically, you assign an IP address to an interface either manually or through DHCP. If the IP
addresses are not enough, or the interface is used only occasionally, you can configure an interface
to borrow an IP address from other interfaces. This is called IP unnumbered, and the interface
borrowing the IP address is called IP unnumbered interface.
Multiple interfaces can use the same unnumbered IP address. If an interface has multiple manually
configured IP addresses, only the primary IP address manually configured can be borrowed.
You cannot enable a dynamic routing protocol on the interface that has no IP address configured. To
enable the interface to communicate with other devices, you must configure a static route to the peer
device on the interface.
Before entering tunnel interface view, make sure the tunnel interface has been created. For
information about tunnel interface, see Layer 3—IP Services Configuration Guide.
Examples
# Configure the interface Tunnel 1 to borrow the IP address of VLAN-interface 100.
<Sysname> system-view
[Sysname] interface tunnel 1
[Sysname-Tunnel1] ip address unnumbered interface vlan-interface 100