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Juniper EX3400 Features Guide

Juniper EX3400
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Data Flow for RADIUS-Sourced DHCP Options on page 34
Multiple VSA 26-55 Instances Configuration on page 35
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 subscribers
(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

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Juniper EX3400 Specifications

General IconGeneral
Switch typeManaged
Switch layerL2/L3
Quality of Service (QoS) supportYes
SafetyUL-UL60950-1, C-UL CAN/CSA 22.2 No.60950-1, TUV/GS to EN 60950-1, CB-IEC60950-1, EN 60825-1
Form factor1U
Product colorBlack
Electromagnetic compatibilityFCC 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 quantity4
QSFP+ module slots quantity2
Installed SFP+ modules quantity0
Basic switching RJ-45 Ethernet ports typeGigabit Ethernet (10/100/1000)
Basic switching RJ-45 Ethernet ports quantity48
Memory typeDRAM
Noise level35 dB
Flash memory2000 MB
Processor frequency1000 MHz
Virtual stacking (units)10
Throughput250 Mpps
Jumbo frames9216
MAC address table32000 entries
Number of VLANs4093
Networking standardsIEEE 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 featuresPort-based VLAN
Copper ethernet cabling technology10BASE-T, 100BASE-T, 1000BASE-T
Power consumption (max)120 W
Number of power supply units1
Operating altitude0 - 3048 m
Non-operating altitude3048 - 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 featuresDHCP server, DHCP client
AuthenticationMAC-based authentication, Port-based authentication
Security algorithms802.1x RADIUS, HTTPS, SNMP, SSH-2
Fiber ethernet cabling technology1000BASE-X
Weight and Dimensions IconWeight and Dimensions
Depth350 mm
Width437 mm
Height44 mm
Weight5740 g

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