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To configure static on-demand IP address IPv4 address allocation for dual-stack PPP subscribers:

Specify the name and logical unit number of the interface.
[edit]user@host# edit interfaces pp0 unit 1000
Specify the on-demand-ip-address option.
[edit interfaces pp0 unit 1000]user@host# set ppp-options on-demand-ip-address

To configure dynamic on-demand IP address IPv4 address allocation for dual-stack PPP subscribers:

Create and name the dynamic profile.
[edit]user@host# edit dynamic profiles ppp-dyn-ipv4
Specify the name and logical unit number of the interface.
[edit]user@host# edit interfaces ppp unit 1000
Specify the on-demand-ip-address option.
[edit interfaces pp0 unit 1000]user@host# set ppp-options on-demand-ip-address

To configure static on-demand IP address IPv4 address allocation for dual-stack PPP subscribers at the system level:

Specify the protocol.
[edit]user@host# edit protocols
Specify the ppp-service option.
[edit protocols]user@host# edit ppp-service
Specify the on-demand-ip-address option.
[edit protocols ppp-service]user@host# set on-demand-ip-address

To enable an immediate interim accounting message:

Create a profile and assign a name to it.
[edit access]user@host# edit profile profile1
Under accounting, specify the address-change-immediate-update option.
[edit access profile profile1]user@host# edit accountinguser@host# set address-change-immediate-update

This procedure shows how to enable the Unisphere IPv4 release control VSA in RADIUS messages:

To configure a RADIUS message:

Create a profile and assign a name to it.
[edit access]user@host# edit profile profile1
Specify that your want to configure RADIUS.
[edit access profile profile1]user@host# edit radius
(Optional) Configure the message RADIUS message.
user@host# set ip-address-change-notify message