Juniper EX3400 Features Guide

NOTE: If the DHCP relay agent is in snoop mode, DHCP relay releases the
client but does not send a release packet to the DHCP server if the discover
packet is for a passive client (a client added as a result of snooped packets)
or if the discover packet is a snooped packet.
Option 60 and Option 82 Requirements
DHCP local server requires that the received discover packet include both DHCP option
60 and option 82. If either option is missing, DHCP local server cannot perform the
secondary identification method and auto logout is not used.
DHCP relay agent requires that the received discover packet contain DHCP option 60.
DHCP relay determines the option 82 value based on the guidelines provided in “How
DHCP Relay Agent Uses Option 82 for Auto Logout” on page 126.
Related
Documentation
Automatically Logging Out DHCP Clients on page 127•
• How DHCP Relay Agent Uses Option 82 for Auto Logout on page 126
• Allowing Only One DHCP Client Per Interface
• Clearing DHCP Bindings for Subscriber Access
How DHCP Relay Agent Uses Option 82 for Auto Logout
Table 15 on page 126 indicates how the DHCP relay agent determines the option 82 value
used for the client auto logout feature. Depending on the configuration settings, DHCP
relay agent takes the action indicated in the right column.
Table 15: DHCP Relay Agent Option 82 Value for Auto Logout
DHCP Relay Agent Configuration Settings
Action
Taken
giaddr in
non-snooped
packet
Override
“always-write-
option-82”
Override
“trust-option-
82”
Discover
Packet
Contains
Option 82
DHCP Relay
Configured
with Option
82
No secondary
search
performed
–––NoNo
Use option 82
from packet
––YesYesNo
Drop packetZero–NoYesNo
Use option 82
from packet
Non-zero–NoYesNo
Copyright © 2017, Juniper Networks, Inc.126
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