Juniper EX3400 Features Guide

Table 9: Unsupported Opaque DHCP Options
CommentsOption NameDHCP Option
Not supported.Pad OptionOption 0
Value is provided by RADIUS
attribute 27 (Session-Timeout).
IP Address Lease TimeOption 51
Not supported.Option OverloadOption 52
Value is provided by DHCP local
server.
DHCP Message TypeOption 53
Value is provided by DHCP local
server.
Server IdentifierOption 54
Value is provided by DHCP local
server.
Parameter Request ListOption 55
Value is provided by DHCP local
server.
EndOption 255
Not supported.DHCP magic cookie–
Related
Documentation
Monitoring DHCP Options Configured on RADIUS Servers•
Port Number Requirements for DHCP Firewall Filters
When you configure a firewall filter to perform some action on DHCP packets at the
Routing Engine, such as protecting the Routing Engine by allowing only proper DHCP
packets, you must specify both port 67 (bootps) and port 68 (bootpc) for both the source
and destination. The firewall filter acts at both the line cards and the Routing Engine.
This requirement applies to both DHCP local server and DHCP relay, but it applies only
when DHCP is provided by the jdhcpd process. MX Series routers use jdhcpd. For DHCP
relay, that means the configuration is required only at the [edit forwarding-options
dhcp-relay] hierarchy level and not at the [edit forwarding-options helpers bootp] hierarchy
level.
DHCP packets received on the line cards are encapsulated by jdhcpd with a new UDP
header where their source and destination addresses are set to port 68 before being
forwarded to the Routing Engine.
For DHCP relay and DHCP proxy, packets sent to the DHCP server from the router have
both the source and destination UDP ports set to 67. The DHCP server responds using
the same ports. However, when the line card receives these DHCP response packets, it
changes both port numbers from 67 to 68 before passing the packets to the Routing
Engine. Consequently the filter needs to accept port 67 for packets relayed from the
client to the server, and port 68 for packets relayed from the server to the client.
Copyright © 2017, Juniper Networks, Inc.36
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