Juniper EX3400 Features Guide

Figure 1: DHCP Client/Server Model
Using DHCP
DHCP automates network-parameter assignment to network devices. Even in small
networks, DHCP is useful because it makes it easy to add new machines to the network.
DHCP access service minimizes the overhead required to add clients to the network by
providing a centralized, server-based setup, which means that you do not have to manually
create and maintain IP address assignments for clients. In addition, when you use DHCP
to manage a pool of IP addresses among hosts, you reduce the number of IP addresses
needed on the network. DHCP does this by leasing an IP address to a host for a limited
period of time, allowing the DHCP server to share a limited number of IP addresses. DHCP
also provides a central database of devices that are connected to the network and
eliminates duplicate resource assignments. In addition to IP addresses for clients, DHCP
provides other configuration information, particularly the IP addresses of local caching
Domain Name System (DNS) resolvers, network boot servers, or other service hosts.
Another valuable DHCP feature is automatic software download for installation of
software packages on switches. DHCP clients configured for automatic software
download receive messages as part of the DHCP message exchange process—when the
software package name in the DHCP server message is different from that of the software
package that booted the DHCP client switch, the new software is downloaded and
installed. See Upgrading Software by Using Automatic Software Download.
DHCP Relay Servers and DHCP Servers
You can configure a switch either as a DHCP server or as a DHCP relay server, but not
both. Whereas a DHCP server replies to a client with an IP address, a DHCP relay server
relays DHCP messages to and from the configured DHCP server, even if the client and
server are on different IP networks.
Configure a switch to be a DHCP relay agent if you have locally attached hosts and a
remote DHCP server.
Copyright © 2017, Juniper Networks, Inc.4
DHCP and Other System Services Feature Guide for EX2300, EX3400, and EX4300 Switches

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