HP 6125XLG R2306-HP 6125XLG Blade Switch Layer 3 - IP Services Configuration G - Page 27

Assigning an IP address to an interface, Configuration guidelines, Configuration procedure

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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, or DHCP. 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, 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. Command system-view interface interface-type interface-number ip address ip-address { mask | mask-length } [ sub ] Remarks N/A N/A By default, no IP address is assigned 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. 18

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18
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, or DHCP.
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, 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
Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter interface view.
interface
interface-type
interface-number
N/A
3.
Assign an IP address to the
interface.
ip
address
ip-address
{
mask
|
mask-length
} [
sub
]
By default, no IP address is
assigned 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.