Spec Sheet

5
Data SheetEX3400 Ethernet Switch
primary (active) and backup (hot-standby) Routing Engine. An
integrated Layer 2 and Layer 3 graceful Routing Engine switchover
(GRES) feature maintains uninterrupted access to applications,
services, and IP communications in the unlikely event of a master
Routing Engine failure.
When more than two switches are interconnected in a Virtual
Chassis configuration, the remaining switch elements act as line
cards and are available to take on the backup Routing Engine
position should the designated master fail. Master, backup,
and line card priority status can be assigned by the network
operations team to dictate the order of ascension. This N+1
Routing Engine redundancy—coupled with GRES, the nonstop
routing (NSR), and, in the future, the nonstop bridging (NSB)
capabilities of Junos OS—ensures a smooth transfer of control
plane functions following unexpected failures.
The EX3400 also supports the following HA features:
• Redundant trunk group—To avoid the complexities of
Spanning Tree Protocol (STP) without sacrificing network
resiliency, the EX3400 employs redundant trunk groups to
provide the necessary port redundancy and simplify switch
configuration.
• Cross-member link aggregation—Cross-member link
aggregation allows redundant link aggregation connections
between devices in a single Virtual Chassis configuration,
providing an additional level of reliability and availability.
• Nonstop bridging (NSB) and nonstop active routing
(NSR)—NSB and NSR on the EX3400 switch ensure
control plane protocols, states, and tables are synchronized
between master and backup REs to prevent protocol flaps
or convergence issues following a Routing Engine failover.
• Nonstop software upgrade (NSSU)—With NSSU, all
members of an EX3400 Virtual Chassis configuration can
be upgraded with a single command. Mission-critical traffic
can be configured as a link aggregate across multiple Virtual
Chassis switch members, ensuring minimal disruption
during the upgrade process.
Enhanced Limited Lifetime Warranty
The EX3400 includes an enhanced limited lifetime hardware
warranty that provides return-to-factory switch replacement for
as long as the original purchaser owns the product. The warranty
includes lifetime software updates, advanced shipping of spares
within one business day, and 24x7 Juniper Networks Technical
Assistance Center (JTAC) support for 90 days after the purchase
date. Power supplies and fan trays are covered for a period of
five years. For complete details, please visit www.juniper.net/
support/warranty.
Physical Specifications
Dimensions (W x H x D)
• 17.4 x 1.72 x 13.8 in (44.2 x 4.4 x 35 cm)
Backplane
• 160 Gbps (with QSFP+ ports) or 80 Gbps (with SFP+
ports) Virtual Chassis interconnect to link up to 10 switches
as a single logical device
Uplink
• Fixed 4-port uplinks can be individually configured as GbE
(SFP) or 10GbE (SFP+) ports; 2 x 40G QSFP+ ports.
System Weight
• EX3400 switch (no power supply or fan module): 10.49 lb
(4.76 kg) maximum
• EX3400 switch (with single power supply and two fan
modules): 12.65 lb (5.74 kg) maximum
• 150 W AC power supply: 1.43 lb (0.65 kg)
• 600 W AC power supply: 1.82 lb (0.83 kg)
• 920 W AC power supply: 1.87 lb (0.85 kg)
• 150 W DC power supply: 1.43 lb (0.65 kg)
• Fan module: 0.16 lb (0.07 kg)
Environmental Ranges
• Operating temperature: 32° to 113° F (0° to 45° C)
• Storage temperature: -40° to 158° F (-40° to 70° C)
• Operating altitude: up to 10,000 ft (3048 m)
• Nonoperating altitude: up to 16,000 ft (4877 m)
• Relative humidity operating: 10% to 85% (noncondensing)
• Relative humidity nonoperating: 0% to 95%
(noncondensing)
Hardware Specifications
Switching Engine Model
• Store and forward
DRAM
• 2 GB with ECC
Flash
• 2 GB
CPU
• Dual Core 1 GHz
GbE port density per system
• EX3400-24T/EX3400-24P/EX3400-24T-DC: 30 (24 host
ports + four 1/10 GbE and two 40GbE uplink ports)
• EX3400-48T/EX3400-48T-AFI/EX3400-48P: 54 (48 host
ports + four 1/10 GbE and two 40GbE uplink ports)
EX3400-48T/P
EX3400-24T/P