Juniper EX3400 Features Guide

To configure liveness detection for DHCP local server:
1. Specify that you want to configure liveness detection.
•
For DHCP global configuration:
[edit system services dhcp-local-server]
user@host# edit liveness-detection
•
For DHCP group configuration:
[edit system services dhcp-local-server 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
system services dhcp-local-server dhcpv6] or [edit system services
dhcp-local-server dhcpv6 group group-name] hierarchy level.
2. Specify that you want to configure the liveness detection method.
•
For DHCP global configuration:
[edit system services dhcp-local-server liveness-detection]
user@host# edit method
•
For DHCP group configuration:
[edit system services dhcp-local-server group group-name liveness-detection]
user@host# edit method
3. Specify the liveness detection method that you want DHCP to use.
NOTE: The only method supported for liveness detection is Bidirectional
Forwarding Detection (BFD).
•
For DHCP global configuration:
[edit system services dhcp-local-server liveness-detection method]
user@host# edit bfd
•
For DHCP group configuration:
[edit system services dhcp-local-server group group-name liveness-detection method]
user@host# edit bfd
4. Configure the liveness detection method as desired.
See Example: Configuring Group Liveness Detection for DHCP Local Server Clients for
an example of how to configure DHCPv4 groups for DHCP local server liveness
detection.
5. Configure the action the router takes when a liveness detection failure occurs.
97Copyright © 2017, Juniper Networks, Inc.
Chapter 7: DHCP Liveness Detection

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