Name: Juniper EX3400
Brand: Juniper
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Help to reduce the window of vulnerability to some security attacks.

Examples of liveness detection protocols include Bidirectional Forwarding Detection

(BFD) for both DHCPv4 and DHCPv6 subscribers, IPv4 Address Resolution Protocol

(ARP) for DHCPv4 subscribers, and IPv6 Neighbor Unreachability Detection for DHCPv6

subscribers.

NOTE: Only BFD for DHCPv4 and DHCPv6 liveness detection is supported.

When configuring BFD liveness detection, keep the following in mind:

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You can configure DHCPv4 and DHCPv6 liveness detection either globally or per

DHCPv4 or DHCPv6 group.

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DHCPv4 or DHCPv6 subscriber access clients that do not support BFD are not affected

by the liveness detection configuration. These clients can continue to access the

network (after they are validated) even if BFD liveness detection is enabled on the

router (or switch).

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When configured, DHCPv4 or DHCPv6 initiates liveness detection checks for clients

that support BFD when those clients enter a bound state.

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After protocol-specific messages are initiated for a BFD client, they are periodically

sent to the subscriber (or client) IP address of the client and responses to those liveness

detection requests are expected within a configured amount of time.

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If liveness detection responses are not received from clients that support BFD within

the configured amount of time for a configured number of consecutive attempts, the

liveness detection check is deemed to have failed. A configured failure action to clear

the client binding is applied.

Documentation

Configuring Detection of DHCP Local Server Client Connectivity on page 96•

• Configuring Detection of DHCP Relay or DHCP Relay Proxy Client Connectivity on

page 98

Configuring Detection of DHCP Local Server Client Connectivity

Liveness detection for DHCP subscriber IP sessions or DHCP client IP sessions utilizes an

active liveness detection protocol to institute liveness detection checks for relevant

clients. Clients must respond to liveness detection requests within a specified amount

of time. If the responses are not received within that time for a given number of

consecutive attempts, then the liveness detection check fails and a failure action is

implemented.

NOTE: You can also configure DHCP liveness detection for DHCP relay.

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