Subscriber Binding Retention During Interface Delete Events - Juniper ACX1000 Configuration Manual

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Subscriber Binding Retention During Interface Delete Events

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(Optional) Specify a pool name from which DHCP information is returned to the client.
2.
[edit system services dhcp-local-server overrides process-inform]
user@host# set pool pool-name
In a routing instance, you can enable processing of DHCP client information request
messages at the
[edit routing-instances routing-instance-name system services
dhcp-local-server overrides]
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 Duplicate Client Support on page 364
Configuring DHCP Client-Specific Attributes on page 325
Specifying the Maximum Number of DHCP Clients Per Interface on page 331
Configuring a DHCP Client on page 360
You can configure the router to maintain DHCP subscribers when an event occurs that
normally results in the router deleting the subscriber. For example, by default, the router
logs out DHCP subscribers when a Packet Forwarding Engine reboot or crash occurs.
However, if you configure the router to maintain subscribers, the router identifies each
subscriber that was on the deleted interface, and resumes normal packet processing for
the subscriber when the interface is restored.
NOTE: Subscribers are logged off as usual when their lease expires, even If
the router is configured to maintain subscribers and the subscriber is on a
deleted interface that has not yet been restored.
You configure the router to maintain subscribers on a global basis— the configuration
applies to DHCP local server in all routing instances. When you enable the maintain
subscribers feature, the router applies the feature to existing subscribers as well as
subscribers who later connect.
If the maintain subscribers feature is enabled on the router, you can explicitly delete a
subscriber binding and log out the subscriber by either specifying a lease expiration
timeout or by using the following command:
clear dhcp server binding
Chapter 10: Configuring DHCP Client and DHCP Server
hierarchy level.
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