Juniper EX2200 Hardware Guide

•
On an EX8200, EX6200, or QFX Series switch, ensure that the selected switch interface
is symmetrically routed before you enable unicast RPF. A symmetrically routed interface
is an interface that uses the same route in both directions between the source and the
destination. Do not enable unicast RPF on asymmetrically routed interfaces. An
asymmetrically routed interface uses different paths to send and receive packets
between the source and the destination.
•
On an EX3200, EX4200, or EX4300 switch, ensure that all switch interfaces are
symmetrically routed before you enable unicast RPF on an interface. When you enable
unicast RPF on any interface, it is enabled globally on all switch interfaces. Do not
enable unicast RPF on asymmetrically routed interfaces. An asymmetrically routed
interface uses different paths to send and receive packets between the source and
the destination.
To enable unicast RPF, configure it explicitly on a selected customer-edge interface:
[edit interfaces]
user@switch# set ge-1/0/10 unit 0 family inet rpf-check
BEST PRACTICE: On EX3200, EX4200, and EX4300 switches, unicast RPF
is enabled globally on all switch interfaces, regardless of whether you
configure it explicitly on only one interface or only on some interfaces.
On EX3200, EX4200, and EX4300 switches, we recommend that you enable
unicast RPF explicitly on either all interfaces or only one interface. To avoid
possible confusion, do not enable it on only some interfaces:
•
Enabling unicast RPF explicitly on only one interface makes it easier if you
choose to disable it in the future because you must explicitly disable unicast
RPF on every interface on which you explicitly enabled it. If you explicitly
enable unicast RPF on two interfaces and you disable it on only one
interface, unicast RPF is still implicitly enabled globally on the switch. The
drawback of this approach is that the switch displays the flag that indicates
that unicast RPF is enabled only on interfaces on which unicast RPF is
explicitly enabled, so even though unicast RPF is enabled on all interfaces,
this status is not displayed.
•
Enabling unicast RPF explicitly on all interfaces makes it easier to know
whether unicast RPF is enabled on the switch because every interface
shows the correct status. (Only interfaces on which you explicitly enable
unicast RPF display the flag that indicates that unicast RPF is enabled.)
The drawback of this approach is that if you want to disable unicast RPF,
you must explicitly disable it on every interface. If unicast RPF is enabled
on any interface, it is implicitly enabled on all interfaces.
Related
Documentation
Example: Configuring Unicast RPF on an EX Series Switch•
• Verifying Unicast RPF Status on page 239
• Disabling Unicast RPF (CLI Procedure) on page 99
Copyright © 2015, Juniper Networks, Inc.98
Network Interfaces for EX4300 Switches

Juniper EX2200 Specifications

General

Throughput	77 Mpps
MAC address table	8000 entries
Jumbo frames support	Yes
Number of VLANs	1024
Networking standards	-
Switch type	Managed
SFP module slots quantity	4
Installed SFP modules quantity	0
Basic switching RJ-45 Ethernet ports quantity	48
Stackable	No
Product color	Black
Power consumption (typical)	100 W
Operating altitude	0 - 3048 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 %

Weight and Dimensions

Depth	254 mm
Width	441 mm
Height	43 mm
Weight	3600 g