Juniper EX3300 Hardware Guide

NOTE: On EX3200, EX4200, and EX4300 switches, unicast RPF works
properly only if all switch interfaces—including aggregated Ethernet interfaces
(also referred to as link aggregation groups or LAGs), integrated routing and
bridging (IRB) interfaces, and routed VLAN interfaces (RVIs)—are
symmetrically routed, because unicast RPF is enabled globally on all switch
interfaces.
Related
Documentation
Verifying Unicast RPF Status on page 239•
• Understanding Unicast RPF on page 19
Diagnosing a Faulty Twisted-Pair Cable (CLI Procedure)
Problem Description: A 10/100/1000BASE-T Ethernet interface has connectivity problems that
you suspect might be caused by a faulty cable.
Solution Use the time domain reflectometry (TDR) test to determine whether a twisted-pair
Ethernet cable is faulty.
The TDR test:
• Detects and reports faults for each twisted pair in an Ethernet cable. Faults detected
include open circuits, short circuits, and impedance mismatches.
• Reports the distance to fault to within 1 meter.
• Detects and reports pair swaps, pair polarity reversals, and excessive pair skew.
The TDR test is supported on the following switches and interfaces:
• EX2200, EX3200, EX3300, and EX4200 switches—RJ-45 network interfaces. The TDR
test is not supported on management interfaces and SFP interfaces.
• EX6200 and EX8200 switches—RJ-45 network interfaces on line cards.
NOTE: We recommend running the TDR test on an interface when there is
no traffic on the interface.
To diagnose a cable problem by running the TDR test:
1. Run the request diagnostics tdr command.
user@switch> request diagnostics tdr start interface ge-0/0/10
Interface TDR detail:
Test status : Test successfully executed ge-0/0/10
2. View the results of the TDR test with the show diagnostics tdr command.
Copyright © 2015, Juniper Networks, Inc.332
Network Interfaces for EX4300 Switches

Juniper EX3300 Specifications

General

Ethernet LAN	Yes
Authentication method	RADIUS, TACACS+
Connectivity technology	Wired
Ethernet interface type	Gigabit Ethernet
Number of VLANs	4096
Networking standards	IEEE 802.1ab, IEEE 802.1D, IEEE 802.1Q, IEEE 802.1s, IEEE 802.1w, IEEE 802.1x, IEEE 802.3, IEEE 802.3ab, IEEE 802.3ad, IEEE 802.3x, IEEE 802.3z
Ethernet LAN data rates	10, 100, 1000 Mbit/s
Copper ethernet cabling technology	1000BASE-T, 100BASE-TX, 10BASE-T
Console port	-
ExpressCard slot	No
Fiber ports quantity	4
USB 2.0 ports quantity	0
Basic switching RJ-45 Ethernet ports quantity	48
Throughput	130 Mpps
Number of queues	8
MAC address table	16000 entries
Maximum data transfer rate	176 Gbit/s
Supported data transfer rates	10, 100, 1000Mbps
Switch type	Managed
Switch layer	L2
Security algorithms	SSH-2
Power source	AC
AC input voltage	100 - 240 V
Power consumption (typical)	100 W
Form factor	1U
Product color	Black
Flash memory	1024 MB
Processor frequency	1000 MHz
Compatible operating systems	Junos
Operating altitude	0 - 3049 m
Non-operating altitude	0 - 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 %
Supported network protocols	IPv6

Weight and Dimensions

Depth	310 mm
Width	437 mm
Height	44 mm
Weight	4900 g