Juniper EX3400 Features Guide

Providing DHCP Client Configuration Information
When the extended DHCP application receives a response from an external authentication
server, the response might include information in addition to the IP address and subnet
mask. The extended DHCP application uses the information from the authentication
grant for the response the DHCP application sends to the DHCP client. The DHCP
application can either send the information in its original form or the application might
merge the information with local configuration specifications. For example, if the
authentication grant includes an address pool name and a local configuration specifies
DHCP attributes for that pool (such as, DNS server address), the extended DHCP
application merges the authentication results and the attributes in the reply that the
server sends to the client.
A local configuration is optional — a client can be fully configured by the external
authentication service. However, if the external authentication service does not provide
client configuration, you might need to configure the local address-assignment pool to
provide the configuration information, such as DNS server, for the client. When a local
configuration specifies options, the extended DHCP application adds the local
configuration options to the offer PDU the server sends to the client. If the two sets of
options overlap, the options in the authentication response from the external service
take precedence.
When you use RADIUS to provide the authentication, the additional information might
be in the form of RADIUS attributes and Juniper Networks VSAs. Table 8 on page 25 lists
the information that RADIUS might include in the authentication grant. See RADIUS
Attributes and Juniper Networks VSAs Supported by the AAA Service Framework for a
complete list of RADIUS attributes and Juniper Networks VSAs that the extended DHCP
applications supports for subscriber access management or DHCP management.
Table 8: Information in Authentication Grant
DescriptionAttribute NameAttribute Number
Client IP addressFramed-IP-AddressRADIUS attribute 8
Subnet mask for client IP address
(DHCP option 1)
Framed-IP-NetmaskRADIUS attribute 9
Primary domain server (DHCP
option 6)
Primary-DNSJuniper Networks VSA 26-4
Secondary domain server (DHCP
option 6)
Secondary-DNSJuniper Networks VSA 26-5
Primary WINS server (DHCP
option 44)
Primary-WINSJuniper Networks VSA 26-6
Secondary WINS server (DHCP
option 44)
Secondary-WINSJuniper Networks VSA 26-7
Lease timeSession-TimeoutRADIUS attribute 27
25Copyright © 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