Juniper EX3400 Features Guide

pass through the router (or switch) to determine when the lease for this client has
expired or been released. This process is referred to as lease shadowing or passive
snooping.
DHCP Liveness Detection
Liveness detection for DHCP subscriber or DHCP client IP sessions utilizes an active
liveness detection protocol to institute liveness detection checks for relevant clients.
Clients are expected to respond to liveness detection requests within a specified amount
of time. If the responses are not received within that time for a given number of
consecutive attempts, then the liveness detection check fails and a failure action is
implemented.
NOTE: DHCP liveness detection either globally or per DHCP group.
Related
Documentation
DHCPv6 Relay Agent Overview on page 85•
• Access and Access-Internal Routes for Subscriber Management
• Dynamic Profile Attachment to DHCP Subscriber Interfaces Overview
• Using External AAA Authentication Services with DHCP on page 101
• DHCP Relay Proxy Overview on page 51
• Graceful Routing Engine Switchover for DHCP
• High Availability Using Unified ISSU in the PPP Access Network
• Verifying and Managing DHCP Relay Configuration on page 81
• Tracing Extended DHCP Operations
• Example: Minimum DHCP Relay Agent Configuration on page 50
• Example: DHCP Relay Agent Configuration with Multiple Clients and Servers
• Example: Configuring DHCP Relay Agent Selective Traffic Processing Based on DHCP
Option Strings on page 53
• Example: Configuring DHCP and DHCPv6 Relay Agent Group-Level Selective Traffic
Processing
• Example: Configuring a DHCP Firewall Filter to Protect the Routing Engine
Copyright © 2017, Juniper Networks, Inc.48
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