Juniper EX3400 Features Guide

CHAPTER 1
DHCP Services
•
Understanding DHCP Services for Switches on page 3
•
Configuring DHCP Services (J-Web Procedure) on page 7
•
Configuring a Switch as a DHCP Server (CLI Procedure) on page 14
•
Configuring a DHCP Client (CLI Procedure) on page 17
•
Configuring a DHCP SIP Server (CLI Procedure) on page 18
Understanding DHCP Services for Switches
A Dynamic Host Configuration Protocol (DHCP) server on a switch can provide many
valuable TCP/IP network services. For example, DHCP can dynamically allocate the four
required IP parameters to each computer on the LAN: IP address, network mask, switch
address, and name server address. Additionally, DHCP on the switch can automatically
upgrade software on client systems.
This topic describes:
•
DHCP Client/Server Model on page 3
•
Using DHCP on page 4
•
DHCP Relay Servers and DHCP Servers on page 4
•
Legacy DHCP and Extended DHCP for Server Versions on page 5
•
Configuring DHCP on a Switch on page 6
•
How DHCP Works on page 6
DHCP Client/Server Model
DHCP IP address allocation works on a client/server model in which the server, in this
case a switch, assigns the client reusable IP information from an address pool. A DHCP
client might receive offer messages from multiple DHCP servers and can accept any one
of the offers; however, the client usually accepts the first offer it receives. See
Figure 1 on page 4.
3Copyright © 2017, Juniper Networks, Inc.

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