Juniper EX3400 Features Guide

To override default DHCP relay agent configuration settings:
1. (DHCPv4 and DHCPv6) Specify that you want to configure override options.
•
DHCPv4 overrides.
Global override:
[edit forwarding-options dhcp-relay]
user@host# edit overrides
Group-level override:
[edit forwarding-options dhcp-relay]
user@host# edit group group-name overrides
Per-interface override:
[edit forwarding-options dhcp-relay]
user@host# edit group group-name interface interface-name overrides
•
DHCPv6 overrides.
Global override:
[edit forwarding-options dhcp-relay dhcpv6]
user@host# edit overrides
Group-level override:
[edit forwarding-options dhcp-relay dhcpv6]
user@host# edit group group-name overrides
Per-interface override:
[edit forwarding-options dhcp-relay dhcpv6]
user@host# edit group group-name interface interface-name overrides
2. (DHCPv4 only) Enable DHCP relay proxy mode.
See “Enabling DHCP Relay Proxy Mode” on page 52.
3. (DHCPv4 only) Overwrite the giaddr in DHCP packets that the DHCP relay agent
forwards.
See “Changing the Gateway IP Address (giaddr) Field to the giaddr of the DHCP Relay
Agent” on page 72.
4. (DHCPv4 only) Replace the IP source address in DHCP relay request and release
packets with the gateway IP address (giaddr).
See “Replacing the DHCP Relay Request and Release Packet Source Address” on
page 72.
5. (DHCPv4 only) Override the DHCP relay agent information option (option 82) in DHCP
packets.
See “Overriding Option 82 Information” on page 71.
69Copyright © 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