Juniper EX3400 Features Guide

•
For DHCP global configuration:
[edit system services dhcp-local-server liveness-detection]
user@host# edit failure-action action
•
For DHCP group configuration:
[edit system services dhcp-local-server group group-name liveness-detection]
user@host# edit failure-action action
Related
Documentation
DHCP Liveness Detection Overview on page 95•
• Extended DHCP Local Server Overview on page 22
• Configuring Detection of DHCP Relay or DHCP Relay Proxy Client Connectivity on
page 98
• Example: Configuring Group Liveness Detection for DHCP Local Server Clients
• Example: Configuring Global Liveness Detection for DHCP Relay Agent Clients
Configuring Detection of DHCP Relay or DHCP Relay Proxy Client Connectivity
Liveness detection for DHCP subscriber IP or DHCP client IP sessions utilizes an active
liveness detection protocol to institute liveness detection checks for relevant clients.
Clients must 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.
To configure liveness detection for DHCP relay:
1. Specify that you want to configure liveness detection.
•
For DHCP global configuration:
[edit forwarding-options dhcp-relay]
user@host# edit liveness-detection
•
For DHCP group configuration:
[edit forwarding-options dhcp-relay group group-name]
user@host# edit liveness-detection
NOTE: Liveness detection is also supported for DHCPv6 configurations.
To configure DHCPv6 liveness detection, include the liveness-detection
statement, and any subsequent configuration statements, at the [edit
forwarding-options dhcp-relay dhcpv6] or [edit forwarding-optionsdhcp-relay
dhcpv6 group group-name hierarchy level.
2. (Optional) Specify that you want to use DHCP relay proxy mode.
[edit forwarding-options dhcp-relay group group-name]
user@host# set overrides proxy-mode
Copyright © 2017, Juniper Networks, Inc.98
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