Assigning An Ip Address To An Interface; Configuration Guidelines; Configuration Procedure; Configuring Ip Unnumbered - H3C MSR 2600 Configuration Manual

Assigning an IP address to an interface

An interface must have an IP address to communicate with other hosts. You can either manually assign
an IP address to an interface, or configure the interface to obtain an IP address through BOOTP, DHCP,
or PPP address negotiation. If you change the way an interface obtains an IP address, the new IP address
will overwrite the previous address.
An interface can have one primary address and multiple secondary addresses.
Typically, you need to configure a primary IP address for an interface. If the interface connects to multiple
subnets, configure primary and secondary IP addresses on the interface so the subnets can communicate
with each other through the interface.

Configuration guidelines

Follow these guidelines when you assign an IP address to an interface:
An interface can have only one primary IP address. A newly configured primary IP address
•
overwrites the previous one.
• You cannot assign secondary IP addresses to an interface that obtains an IP address through
BOOTP, DHCP, PPP address negotiation, or IP unnumbered.
The primary and secondary IP addresses you assign to the interface can be located on the same
•
network segment, but different interfaces on your device must reside on different network segments.

Configuration procedure

To assign an IP address to an interface:
Step
1. Enter system view.
2. Enter interface view.
3. Assign an IP address to the
interface.

Configuring IP unnumbered

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.
You can use IP unnumbered to save IP addresses either when available IP addresses are inadequate or
when an interface is brought up only for occasional use.
Command
system-view
interface interface-type
interface-number
ip address ip-address { mask |
mask-length } [ sub ]
21
Remarks
N/A
N/A
By default, no IP address is
assigned to the interface.