9-5
Use the undo ip address ip-address { mask | mask-length } command to remove the primary IP
address.
Use the undo ip address ip-address { mask | mask-length } sub command to remove a secondary IP
address.
By default, no IP address is assigned to any interface.
When assigning IP addresses to an interface, consider the following:
z You can assign only one primary IP address to an interface.
z The primary and secondary IP addresses can be located in the same network segment.
z Before removing the primary IP address, remove all secondary IP addresses.
z 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 DHCP.
Related commands: display ip interface.
Examples
# Assign VLAN-interface 1 a primary IP address and a secondary IP address, with subnet masks being
255.255.255.0.
<Sysname> system-view
[Sysname] interface vlan-interface 1
[Sysname-Vlan-interface1] ip address 129.12.0.1 255.255.255.0
[Sysname-Vlan-interface1] ip address 202.38.160.1 255.255.255.0 sub
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