Juniper EX3400 Features Guide

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Data Flow for RADIUS-Sourced DHCP Options on page 34
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Multiple VSA 26-55 Instances Configuration on page 35
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DHCP Options That Cannot Be Centrally Configured on page 35
Data Flow for RADIUS-Sourced DHCP Options
Figure 3 on page 34 shows the procedure subscriber management (DHCP management)
uses when configuring DHCP options for subscribers (DHCP clients).
Figure 3: DHCP Options Data Flow
Subscriber 31
Subscriber 32
Subscriber 60
Subscriber 2
Subscriber 30
DSLAM
g017524
2
1
Subscriber 1
6
5
DHCP local server
RADIUS
server
RADIUS client
4
3
The following general sequence describes the data flow when subscriber management
(DHCP management) uses RADIUS-sourced DHCP options and VSA 26-55 to configure
a DHCP subscriber (client):
1. The subscriber (DHCP client) sends a DHCP discover message (or DHCPv6 solicit
message) to the DHCP local server. The message includes client-sourced DHCP
options.
2. The DHCP local server initiates authentication with the Junos OS RADIUS client.
3. The RADIUS client sends an Access-Request message on behalf of the subscriber
(DHCP client) to the external RADIUS server. The message includes the subscriber’s
(DHCP client’s) client-sourced DHCP options.
4. The external RADIUS server responds by sending an Access-Accept message to the
RADIUS client. The Access-Accept message includes the RADIUS-sourced opaque
DHCP options in VSA 26-55.
5. The RADIUS client sends the DHCP options string to DHCP local server. If there are
multiple VSA 26-55 instances, the RADIUS client first assembles them into a single
options string.
6. DHCP local server processes all options into the DHCP offer (or DHCPv6 reply)
message, except for the RADIUS-sourced VSA 26-55 DHCP options. After processing
Copyright © 2017, Juniper Networks, Inc.34
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