Juniper EX3400 Features Guide

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)

Juniper EX3400 Specifications

General

Switch type	Managed
Switch layer	L2/L3
Quality of Service (QoS) support	Yes
Safety	UL-UL60950-1, C-UL CAN/CSA 22.2 No.60950-1, TUV/GS to EN 60950-1, CB-IEC60950-1, EN 60825-1
Form factor	1U
Product color	Black
Electromagnetic compatibility	FCC 47CFR 15 A, EN 55022 A, ICES-003 A, VCCI A, AS/NZS CISPR 22 A, CISPR 22 A, EN 55024, EN 300386, CE
SFP+ module slots quantity	4
QSFP+ module slots quantity	2
Installed SFP+ modules quantity	0
Basic switching RJ-45 Ethernet ports type	Gigabit Ethernet (10/100/1000)
Basic switching RJ-45 Ethernet ports quantity	48
Memory type	DRAM
Noise level	35 dB
Flash memory	2000 MB
Processor frequency	1000 MHz
Virtual stacking (units)	10
Throughput	250 Mpps
Jumbo frames	9216
MAC address table	32000 entries
Number of VLANs	4093
Networking standards	IEEE 802.1D, IEEE 802.1Q, IEEE 802.1ab, IEEE 802.1p, IEEE 802.1s, IEEE 802.1w, IEEE 802.1x, IEEE 802.3, IEEE 802.3ab, IEEE 802.3ad, IEEE 802.3ae, IEEE 802.3u, IEEE 802.3z
Virtual LAN features	Port-based VLAN
Copper ethernet cabling technology	10BASE-T, 100BASE-T, 1000BASE-T
Power consumption (max)	120 W
Number of power supply units	1
Operating altitude	0 - 3048 m
Non-operating altitude	3048 - 4877 m
Storage temperature (T-T)	-40 - 70 °C
Operating temperature (T-T)	0 - 45 °C
Storage relative humidity (H-H)	0 - 95 %
Operating relative humidity (H-H)	10 - 85 %
DHCP features	DHCP server, DHCP client
Authentication	MAC-based authentication, Port-based authentication
Security algorithms	802.1x RADIUS, HTTPS, SNMP, SSH-2
Fiber ethernet cabling technology	1000BASE-X

Weight and Dimensions

Depth	350 mm
Width	437 mm
Height	44 mm
Weight	5740 g