Juniper EX3400

client-discover-match (DHCP Local Server)
Syntax client-discover-match <option60-and-option82 | incoming-interface>;
Hierarchy Level [edit system services dhcp-local-server overrides],
[edit system services dhcp-local-server group group-name overrides],
[edit system services dhcp-local-server group group-name interface interface-name overrides]
[edit logical-systems logical-system-name routing-instances routing-instance-name system
services dhcp-local-server ... overrides],
[edit logical-systems logical-system-name system services dhcp-local-server ...overrides],
[edit routing-instances routing-instance-name system services dhcp-local-server ...overrides]
Release Information Statement introduced in Junos OS Release 9.4.
Statement introduced in Junos OS Release 12.3R2 for EX Series switches.
incoming-interface option added in Junos OS Release 13.3.
Description Configure the match criteria DHCP local server uses to uniquely identify DHCP subscribers
or clients when primary identification fails. The options are mutually exclusive.
Default By default, DHCP uses the option60-and-option82 option.
Options incoming-interface—(Optional) Allow only one client device to connect on the interface.
If the client device changes, the router deletes the existing client binding and creates
a binding for the newly connected device.
NOTE: The overrides client-discover-match incoming-interface
configuration deletes and replaces the existing binding when a new
device connects. This action differs from the overrides
interface-client-limit 1 statement, which retains the existing binding and
rejects the newly connected client.
option60-and-option82—(Optional) Use option 60 and option 82 information to identify
subscribers.
Required Privilege
Level
system—To view this statement in the configuration.
system-control—To add this statement to the configuration.
Related
Documentation
• Extended DHCP Local Server Overview on page 22
• Overriding Default DHCP Local Server Configuration Settings on page 28
• DHCP Auto Logout Overview on page 124
• Allowing Only One DHCP Client Per Interface
159Copyright © 2017, Juniper Networks, Inc.
Chapter 12: Configuration Statements (DHCP and DHCP Relay)