Juniper EX3400 Features Guide

Subscriber management (on the routers) or DHCP management (on the switches)
enables you to centrally configure DHCP options on a RADIUS server and then distribute
the options on a per-subscriber or per DHCP-client basis. This method results in
RADIUS-sourced DHCP options—the DHCP options originate at the RADIUS server and
are sent to the subscriber (or DHCP client). This differs from the traditional client-sourced
method (also called DHCP-sourced) of configuring DHCP options, in which the options
originate at the client and are sent to the RADIUS server. The subscriber management
(DHCP management) RADIUS-sourced DHCP options are also considered to be opaque,
because DHCP local server performs minimal processing and error checking for the DHCP
options string before passing the options to the subscriber (DHCP client).
Subscriber management (or DHCP management) uses Juniper Networks VSA 26-55
(DHCP-Options) to distribute the RADIUS-sourced DHCP options. The RADIUS server
includes VSA 26-55 in the Access-Accept message that the server returns during
subscriber authentication or DHCP client authentication. The RADIUS server sends the
Access-Accept message to the RADIUS client, and then on to DHCP local server for return
to the DHCP subscriber. The RADIUS server can include multiple instances of VSA 26-55
in a single Access-Accept message. The RADIUS client concatenates the multiple
instances and uses the result as a single instance.
There is no CLI configuration required to enable subscriber management (DHCP
management) to use the centrally configured DHCP options—the procedure is triggered
by the presence of VSA 26-55 in the RADIUS Access-Accept message.
When building the offer packet for the DHCP client, DHCP local server uses the following
sequence:
1. Processes any RADIUS-configured parameters that are passed as separate RADIUS
attributes; for example, RADIUS attribute 27 (Session Timeout).
2. Processes any client-sourced parameters; for example, RADIUS attributes 53 (DHCP
Message Type) and 54 (Server Identifier).
3. Appends (without performing any processing) the opaque DHCP options string
contained in the VSA 26-55 received from the RADIUS server.
In addition to supporting central configuration of DHCP options directly on the RADIUS
server (RADIUS-sourced options), subscriber management (DHCP management) also
supports the traditional client-sourced options configuration, in which the router’s
(switch’s) DHCP component sends the options to the RADIUS server. The client-sourced
DHCP options method is supported for both DHCP local server and DHCP relay agent;
however, the RADIUS-sourced central configuration method is supported on DHCP local
server only. Both the RADIUS-sourced and client-sourced methods support DHCPv4 and
DHCPv6 subscribers (clients).
NOTE: You can use the RADIUS-sourced and client-sourced methods
simultaneously on DHCP local server. However, you must ensure that the
central configuration method does not include options that override
client-sourced DHCP options, because this can create unpredictable results.
33Copyright © 2017, Juniper Networks, Inc.
Chapter 2: DHCP Local Server

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