Juniper EX3400 Features Guide

Extended DHCP Relay Agent Overview
You can configure extended DHCP relay options on the router or on the switch and enable
the router (or switch) to function as a DHCP relay agent. A DHCP relay agent forwards
DHCP request and reply packets between a DHCP client and a DHCP server.
DHCP relay supports the attachment of dynamic profiles and also interacts with the local
AAA Service Framework to use back-end authentication servers, such as RADIUS, to
provide subscriber authentication or DHCP client authentication. You can attach dynamic
profiles and configure authentication support on a global basis or for a specific group of
interfaces.
NOTE: The PTX Series Packet Transport Routers do not support
authentication for DHCP relay agents.
On the routers, you can use DHCP relay in carrier edge applications such as video/IPTV
to obtain configuration parameters, including an IP address, for your subscribers.
On the switches, you can use DHCP relay to obtain configuration parameters including
an IP address for DHCP clients.
NOTE: The extended DHCP relay agent options configured with the dhcp-relay
statement are incompatible with the DHCP/BOOTP relay agent options
configured with the bootp statement. As a result, you cannot enable both the
extended DHCP relay agent and the DHCP/BOOTP relay agent on the router
at the same time.
For information about the DHCP/BOOTP relay agent, see Configuring Routers,
Switches, and Interfaces as DHCP and BOOTP Relay Agents.
You can also configure the extended DHCP relay agent to support IPv6 clients.
See“DHCPv6 Relay Agent Overview” on page 85 for information about the DHCPv6 relay
agent feature.
To configure the extended DHCP relay agent on the router (or switch), include the
dhcp-relay statement at the [edit forwarding-options] hierarchy level.
You can also include the dhcp-relay statement at the following hierarchy levels:
•
[edit logical-systems logical-system-name forwarding-options]
•
[edit logical-systems logical-system-name routing-instances routing-instance-name
forwarding-options]
•
[edit routing-instances routing-instance-name forwarding-options]
This overview covers:
Copyright © 2017, Juniper Networks, Inc.46
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