Juniper JUNOSE SOFTWARE 11.2.X - BROADBAND ACCESS CONFIGURATION GUIDE 7-20-2010 Configuration Manual page 649

interface gigabitEthernet
interface tenGigabitEthernet
interface loopback
Copyright © 2010, Juniper Networks, Inc.
Use the no version to remove IP from an interface or subinterface. You must issue the
no version from the highest level down; you cannot remove an interface or a subinterface
if the one above it still exists.
See interface fastEthernet
Use to select a Gigabit Ethernet interface.
NOTE: You can configure only the primary port, 0, on the Gigabit Ethernet module. The
router automatically uses the redundant port if the primary port fails.
Example
host1(config)#interface gigabitEthernet 1/0
Use the no version to remove IP from an interface. You must issue the no version from
the highest level down; you cannot remove an interface or a subinterface if the one
above it still exists.
See interface gigabitEthernet
Use to select a 10-Gigabit Ethernet interface on the E120 router or the E320 router.
Use the slot/adapter/port format.
Example
host1(config)#interface tenGigabitEthernet 4/0/1
Use the no version to remove IP from an interface. You must issue the no version from
the highest level down; you cannot remove an interface or subinterface if the one above
it still exists.
See interface tenGigabitEthernet
Use to access and configure a loopback interface.
You can use a loopback interface to provide a stable IP address that can minimize the
impact if a physical interface goes down.
You cannot shut down a loopback interface.
BEST PRACTICE: We recommend that you configure a 32-bit subnet mask for the
loopback interface. For example, if you configure a loopback interface with the IP address
and mask as 1.1.1.1/16, the 1.1.0.0/16 route entry is entered on the line module and all
traffic destined to the to 1.1.0.0/16 subnet is forwarded to the SRP module by the line
module. Although the SRP module responds only to traffic destined to the 1.1.1.1 subnet
and discards traffic to all other host IP addresses within that subnet (1.1.1.1/16), if no
Chapter 25: Configuring Subscriber Interfaces
611