Juniper EX3400 Features Guide

Configuring an Extended DHCP Relay Server on EX Series Switches (CLI Procedure)
You can configure an EX Series switch to act as an extended DHCP relay agent. This
means that a locally attached host can issue a DHCP request as a broadcast message
and the switch configured for DHCP relay relays the message to a specified DHCP server.
Configure a switch to be a DHCP relay agent if you have locally attached hosts and a
remote DHCP server.
Before you begin:
•
Ensure that the switch can connect to the DHCP server.
To configure a switch to act as an extended DHCP relay agent server:
1. Create at least one DHCP server group, which is a group of 1 through 5 DHCP server
IP addresses:
[edit forwarding-options dhcp-relay]
user@switch# set server-group server-group-name ip-address
2. Set the global active DHCP server group. The DHCP relay server relays DHCP client
requests to the DHCP servers defined in the active server group:
[edit forwarding-options dhcp-relay]
user@switch# set active-server-group server-group-name
3. Create a DHCP relay group that includes at least one interface. DHCP relay runs on
the interfaces defined in DHCP groups:
[edit forwarding-options dhcp-relay]
user@switch# set group group-name interface interface-name
4. (Optional) Configure overrides of default DHCP relay behaviors, at the global level.
See the override options in the overrides statement.
[edit forwarding-options dhcp-relay]
user@switch# set overrides
5. (Optional) Configure DHCP relay to use the DHCP vendor class identifier option
(option 60) in DHCP client packets, at the global level:
[edit forwarding-options dhcp-relay]
user@switch# set relay-option option-number 60
6. (Optional) Configure settings for a DHCP relay group that override the settings at the
global level, using these statements:
[edit forwarding-options dhcp-relay group group-name]
user@switch# set active-server-group server-group-name
user@switch# set overrides
user@switch# set relay-option option-number 60
49Copyright © 2017, Juniper Networks, Inc.
Chapter 4: DHCP Relay Agent

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