Juniper EX3400 Features Guide

16. (DHCPv4 and DHCPv6) Disable automatic binding of stray DHCP requests.
See “Disabling Automatic Binding of Stray DHCP Requests” on page 59.
17. (DHCPv4 and DHCPv6) Assign a single-session DHCP dual-stack group to a specified
group of subscribers. You must assign the group to both legs of the DHCP dual stack.
See Configuring Single-Session DHCP Dual-Stack Support.
18. (Optional, DHCPv4 and DHCPv6l) Specify that a short lease be sent to the client.
See Configuring DHCP Asymmetric Leasing.
Related
Documentation
Configuring Group-Specific DHCP Relay Options on page 92•
• Deleting DHCP Local Server and DHCP Relay Override Settings on page 30
Overriding Option 82 Information
You can configure the DHCP relay agent to add or remove the DHCP relay agent
information option (option 82) in DHCP packets.
This feature causes the DHCP relay agent to perform one of the following actions,
depending on the configuration:
•
If the DHCP relay agent is configured to add option 82 information to DHCP packets,
it clears the existing option 82 values from the DHCP packets and inserts the new
values before forwarding the packets to the DHCP server.
•
If the DHCP relay agent is not configured to add option 82 information to DHCP packets,
it clears the existing option 82 values from the packets, but does not add any new
values before forwarding the packets to the DHCP server.
To override the default option 82 information in DHCP packets destined for a DHCP
server:
1. Specify that you want to configure override options.
[edit forwarding-options dhcp-relay]
user@host# edit overrides
2. Specify that the option 82 information in DHCP packets is overwritten.
[edit forwarding-options dhcp-relay overrides]
user@host# set always-write-option-82
Related
Documentation
Extended DHCP Relay Agent Overview on page 46•
• Overriding the Default DHCP Relay Configuration Settings on page 68
71Copyright © 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