The following is a sample configuration example:
system services {
    dhcp-local-server {
   persistent-storage automatic 
        }
    }
}
To configure a file to store subscriber binding information:
1. Specify a filename for storing subscriber binding information.
[edit system processes dhcp-service]
user@host# set persistent-storage file-name
2. Specify a frequency to backup the file.
[edit system processes dhcp-service]
user@host# set persistent-storage backup time
The following is a sample configuration example:
system processes {
    dhcp-service {
          persistent-storage {
                  file-name;
                  backup;
          }
    } 
}
Related
Documentation
Extended DHCP Local Server Overview on page 315•
• DHCP Local Server Handling of Client Information Request Messages on page 335
• DHCP Duplicate Client Differentiation Using Client Subinterface Overview on page 362
• Guidelines for Configuring Support for DHCP Duplicate Clients on page 363
• Understanding DHCP Client Operation on page 359
• Configuring DHCP Client-Specific Attributes on page 325
• Automatically Logging Out DHCP Clients on page 335
• Enabling Processing of Client Information Requests on page 336
• Configuring a DHCP Client on page 360
• Preserving Subscriber Binding Information on page 339
Understanding Dynamic Reconfiguration of Extended DHCP Local Server Clients
Dynamic reconfiguration of clients enables the extended DHCP local server to initiate a
client update without waiting for the client to initiate a request.
341Copyright © 2017, Juniper Networks, Inc.
Chapter 10: Configuring DHCP Client and DHCP Server