Juniper EX3400 Features Guide

The second procedure, which applies only to DHCPv4 relay agent, is described in
“Configuring DHCP Snooped Packets Forwarding Support for DHCP Relay Agent” on
page 77, and configures the forwarding action for snooped clients, which specifies whether
DHCP relay agent forwards or drops snooped traffic.
You can enable or disable DHCP globally for DHCP relay, for a group of interfaces, or for
a specific interface in a group.
By default, DHCP snooping is disabled for DHCP relay. To enable or disable DHCP snooping
support globally:
1. Specify that you want to configure DHCP relay agent.
•
For DHCP relay agent:
[edit]
user@host# edit forwarding-options dhcp-relay
•
For DHCPv6 relay agent:
[edit]
user@host# edit forwarding-options dhcp-relay dhcpv6
2. Specify that you want to override the default configuration.
•
For DHCP relay agent:
[edit forwarding-options dhcp-relay]
user@host# edit overrides
•
For DHCPv6 relay agent:
[edit forwarding-options dhcp-relay dhcpv6]
user@host# edit overrides
3. Enable or disable DHCP snooping support.
•
To enable DHCP snooping:
•
For DHCP relay agent:
[edit forwarding-options dhcp-relay overrides]
user@host# set allow-snooped-clients
•
For DHCPv6 relay agent:
[edit forwarding-options dhcp-relay dhcpv6 overrides]
user@host# set allow-snooped-clients
•
To disable DHCP snooping:
•
For DHCP relay agent:
[edit forwarding-options dhcp-relay overrides]
user@host# set no-allow-snooped-clients
•
For DHCPv6 relay agent:
[edit forwarding-options dhcp-relay dhcpv6 overrides]
user@host# set no-allow-snooped-clients
73Copyright © 2017, Juniper Networks, Inc.
Chapter 4: DHCP Relay Agent

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