Name: Juniper EX3400
Brand: Juniper
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failure-action

Syntax failure-action (clear-binding | clear-binding-if-interface-up | log-only);

Hierarchy Level [edit system services dhcp-local-server liveness-detection],

[edit system services dhcp-local-server dhcpv6 liveness-detection],

[edit forwarding-options dhcp-relay liveness-detection],

[edit forwarding-options dhcp-relay dhcpv6 liveness-detection],

[edit system services dhcp-local-server group group-name liveness-detection],

[edit system services dhcp-local-server dhcpv6 group group-name liveness-detection],

[edit forwarding-options dhcp-relay group group-name liveness-detection],

[edit forwarding-options dhcp-relay dhcpv6 group group-name liveness-detection]

Release Information Statement introduced in Junos OS Release 12.1.

Statement introduced in Junos OS Release 12.3R2 for EX Series switches.

Description Configure the action the router (or switch) takes when a liveness detection failure occurs.

Options Default: clear-binding

clear-binding—The DHCP client session is cleared when a liveness detection failure occurs,

except when maintain-subscribers interface-delete setting is configured and active.

clear-binding-if-interface-up—The DHCP client session is cleared only when a liveness

detection failure occurs and the local interface is detected as being up. Use this

setting to distinguish failures from between a liveness detection failure due to a local

network error, and a host disconnecting from the network. If the client binding is in

the maintain-binding Finite State Machine (FSM) state when the liveness detection

failure detection occurs, then the binding is not deleted.

log-only—A message is logged to indicate the event; no action is taken and DHCP is left

to manage the failure and maintain the client binding.

Required Privilege

Level

routing—To view this statement in the configuration.

routing-control—To add this statement to the configuration.

Documentation

• DHCP Liveness Detection Overview on page 95

• 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

• Example: Configuring Group Liveness Detection for DHCP Local Server Clients

• Example: Configuring Global Liveness Detection for DHCP Relay Agent Clients

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