Juniper JUNOSE 11.1.X - BROADBAND ACCESS CONFIGURATION GUIDE 6-4-2010 Configuration Manual page 672

JUNOSe 11.1.x Broadband Access Configuration Guide
ip inactivity-timer
ip source-prefix
ip unnumbered
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Configuring Dynamic Subscriber Interfaces
Use the no version to prevent the DHCP local server from supplying IP addresses
from the specified pool.
See ip dhcp-local pool
Use to configure the inactivity timer value. A dynamically created subscriber
interface is deleted if it is inactive for a period longer than the inactivity timer
value.
The timer value can be in the range 1–65335 minutes.
A timer value of 0 specifies that dynamically created subscriber interfaces are
never deleted by the inactivity timer.
Example
host1(config-if)#ip inactivity-timer 100
Use the no version to restore the default, in which inactivity timer feature is
disabled.
See ip inactivity-timer
Use to configure a subscriber interface or a primary IP interface enabled for
dynamic creation of subscriber interfaces to demultiplex traffic with the specified
source address.
You can issue this command from either Interface Configuration mode or
Subinterface Configuration mode.
Example
host1(config-if)#ip source-prefix 10.10.2.0 255.255.255.0
Use the no version to remove the association between the interface and the
specified IP source address and mask.
See ip source-prefix
Use to configure an unnumbered IP interface.
This command enables IP processing on an interface without assigning an explicit
IP address to the interface.
You must specify an interface location, which is the identifier of another interface
on which the router has an assigned IP address. This interface cannot be another
unnumbered interface.
Examples
host1(config-if)#ip unnumbered fastEthernet 3/0
host1(config-if)#ip unnumbered loopback 10