Configuration Prerequisites; Configuration Procedure; Ip Unnumbered Configuration Example - H3C S9500 Series Operation Manual

Operation Manual – IP Addressing
H3C S9500 Series Routing Switches

1.3.1 Configuration Prerequisites

Assign a primary IP address to the interface from which you want to borrow the IP
address.

1.3.2 Configuration Procedure

Follow these steps to configure IP unnumbered on an interface:
Enter system view
Enter POS interface
view
Specify the current
interface to borrow the
IP address of the
specified interface
Caution:
One interface cannot borrow an IP address from an unnumbered interface.
Multiple interfaces can use the same unnumbered IP address.
One interface borrows only the primary IP address among multiple IP addresses
from another interface.
The IP address of the borrowing interface always keeps consistent and varies with
that of the borrowed interface. That is, if an IP address is configured for the
borrowed interface, the IP address of the borrowing interface is the same as that of
the borrowed interface; if no IP address is configured for the borrowed interface, no
IP address is assigned for the borrowing interface.
VLAN interfaces, tunnel interfaces, and loopback interfaces cannot borrow IP
addresses of other interfaces, but other interfaces can borrow IP addresses of these
interfaces.
A VLAN interface should be created before its IP address can be borrowed.

1.3.3 IP Unnumbered Configuration Example

I. Network requirements
Two switches, Switch A and Switch B, on an intranet are connected to each other
through POS interfaces across DDN. The interfaces connecting them to DDN are both
POS 2/1/1. They each connect to a LAN through interface VLAN-interface 1.
To do... Use the command...
system-view
interface pos
interface-number
ip address unnumbered
interface interface-type
interface-number
Chapter 1 IP Addressing Configuration
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Required
The interface does not
borrow IP addresses from
other interfaces by default.
1-7
Remarks