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Chapter 3
Initial Configuration
20
Avaya X330WAN User’s Guide
Configuring Loopback Interfaces
All CLI commands mentioned in this section are described in Chapter 6: X330WAN 
CLI Commands
.
To configure Loopback interfaces:
1
Enter the Interface Loopback mode using the 
interface Loopback
 
[<interface number>[.ip-interface]]
 command. 
For example:
 typing 
interface loopback 1
 enters a context for configuring 
the Loopback1 interface parameters.
The prompt changes to 
X330WAN-2DS1-N(super-if:Loopbackn)#
where 
N
 is the switch number and 
n
 is the Loopback interface number.
2
Use  the 
ip address
 <ip address> <mask>
 command to assign an IP address 
and subnet mask to the interface.
3
Type 
exit
 to return to Supervisor mode. 
The prompt returns to 
X330WAN-2DS1-N(super)#
Note:  
The first IP interface created in the X330WAN automatically becomes the PMI 
(Primary Management Interface), described in detail on page 34. It is recommended 
to configure the Loopback interface as the first Layer 2 interface and to configure an 
IP interface on it. After the PMI is configured, the following message appears:
The primary management interface has changed.
For this change to take effect, you need to copy running-config 
startup-config and then reset the device.
Enter the 
copy running-config startup-config
 and 
reset
 
commands at this 
stage.
Configuring Fast Ethernet Interfaces
All CLI commands mentioned in this section are described in Chapter 6: X330WAN 
CLI Commands.
To configure Fast Ethernet interfaces:
1
Type 
interface FastEthernet 1
 to enter the Interface Configuration mode.
The prompt changes to 
X330WAN-2DS1-N(super-if:FastEthernet1)#
2
Use  the 
ip address
 <ip address> <mask>
 command to assign an IP address 
and subnet mask to the interface.
3
Type 
exit
 to return to Supervisor mode.
The prompt returns to 
X330WAN-2DS1-N(super)#
Note:  
The first IP interface created in the X330WAN automatically becomes the 
PMI, described in detail on page 34. It is recommended to configure the Loopback 
interface as the first Layer 2 interface and to configure an IP interface on it. After the