Juniper EX3400 Features Guide

interface (DNS, Port, and TFTP Packet Forwarding or Relay Agent)
Syntax interface interface-name {
broadcast;
description text-description;
no-listen;
server address <logical-system logical-system-name> <routing-instance
routing-instance-name>;
}
Hierarchy Level [edit forwarding-options helpers domain],
[edit forwarding-options helpers port port-number],
[edit forwarding-options helpers tftp]
Release Information Statement introduced before Junos OS Release 7.4.
Statement introduced in Junos OS Release 9.0 for EX Series switches.
Statement introduced for port helpers in Junos OS Release 17.2R1 for EX4300 switches.
Support for multiple server instances for a given port introduced in Junos OS Release 17.2
for MX Series routers.
Support for multiple server instances for a given port introduced in Junos OS Release
17.3R1 for EX9200 switches.
Description Specify the interface for monitoring and forwarding DNS or TFTP requests, or for
forwarding LAN broadcast traffic on a custom UDP port to a particular server as unicast
traffic.
When configuring port helpers, in releases prior to Junos OS Release 17.2, only one server
can be specified for a given port. For Junos OS Release 17.2 and later, multiple servers
can be specified for a given port at the global or interface-specific level. In this case, the
same packet, with the originator IP address and port requests, is forwarded to the different
configured servers; the payload of the UDP packet is not modified.
Options interface-name—Name of the interface.
The remaining statements are explained separately. See CLI Explorer.
Required Privilege
Level
interface—To view this statement in the configuration.
interface-control—To add this statement to the configuration.
Related
Documentation
• Configuring DNS and TFTP Packet Forwarding
• Configuring Port-based LAN Broadcast Packet Forwarding on page 133
Copyright © 2017, Juniper Networks, Inc.330
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