Juniper EX3400 Features Guide

Legacy DHCP and Extended DHCP for Server Versions
Two versions of both DHCP server and DHCP relay agent are available on EX Series, QFX
Series, and OCX Series switches. The original legacy DHCP server and legacy DHCP relay
agent can be used in the same network as the extended DHCP servers and extended
DHCP relay agent—extended DHCP is also referred to as virtual router (VR) aware DHCP.
You cannot configure legacy DHCP and extended DHCP versions on the same switch.
Because the newer extended DHCP server version has more features, we recommend
that you configure the extended DHCP server if it is supported by the switch.
The extended DHCP server version has the following added features:
•
Graceful Routing Engine switchover (GRES), which provides mirroring support for
clients.
•
Virtual routing and forwarding (VRF), which allows multiple instances of a routing
table to simultaneously coexist on the same switch. For details, see Understanding
Virtual Routing Instances on EX Series Switches .
NOTE: Legacy DHCP supports the circuit ID and the remote ID fields for the
relay agent option (option 82). Extended DHCP for the relay agent option
supports only circuit ID. See EX Series Switch Software Features Overview for
a list of switches that support extended DHCP (VR-aware DHCP).
Legacy DHCP and extended DHCP servers can be configured at the hierarchy levels
shown in Table 3 on page 5:
Table 3: Legacy DHCP and Extended DHCP Server Hierarchy Levels
HierarchyDHCP Service
edit system services dhcp-local-serverExtended DHCP server
edit access address-assignment poolExtended DHCP address pool
edit system services dhcpLegacy DHCP server
edit forwarding-options helpers bootpLegacy DHCP relay
edit forwarding-options dhcp-relayExtended DHCP relay
edit system services dhcp poolLegacy DHCP address pool
DHCP clients on a switch are always configured at the hierarchy level [edit interfaces
interface-name family dhcp].
5Copyright © 2017, Juniper Networks, Inc.
Chapter 1: DHCP Services

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