Automatically Logging Out Dhcp Clients; Dhcp Local Server Handling Of Client Information Request Messages - Juniper ACX1000 Configuration Manual

Automatically Logging Out DHCP Clients

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DHCP Local Server Handling of Client Information Request Messages

Copyright © 2017, Juniper Networks, Inc.
You can configure the extended DHCP local server to automatically log out DHCP clients.
Auto logout immediately releases an existing client when DHCP receives a discover
packet that has the same DHCP option 60 and DHCP option 82 information as the existing
client. DHCP then releases the existing client IP address without waiting for the normal
lease expiration.
NOTE: When the existing client is released, the new client undergoes the
normal discovery process. The new client might not receive the same IP
address as the original client.
To configure DHCP client auto logout:
Specify that you want to configure override options.
1.
[edit system services dhcp-local-server]
user@host# edit overrides
Enable auto logout.
2.
[edit system services dhcp-local-server overrides]
user@host# set client-discover-match
In a routing instance, you can configure DHCP client auto logout at the
routing-instances routing-instance-name system services dhcp-local-server overrides]
hierarchy level.
NOTE: If you change the auto logout configuration, existing clients continue
to use the auto logout setting that was configured when they logged in. New
clients use the new setting.
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
Address-Assignment Pools Overview on page 317
DHCP Auto Logout Overview on page 333
Dynamic Host Configuration Protocol (DHCP) clients that already have externally provided
addresses might solicit further configuration information from a DHCP server by sending
a DHCP information request that indicates what information is desired. By default, DHCP
Chapter 10: Configuring DHCP Client and DHCP Server
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