configuring gigabit ethernet interfaces (cli procedure)
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figuring Gigabit Ethernet Interfaces (CLI Procedure) - Technical Documentation - Support - Juniper Networks
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TechLibr ary
Supported
Platforms
EX Series
Related
Documentation
EX Series
Configuring Gigabit
Ethernet Interfaces (J-
Web Procedure)
Monitoring Interface
Status and Traffic
show interfaces xe-
Understanding
Interface Naming
Conventions on EX
Series Switches
EX Series, QFabric
System, QFX Series
standalone switches
show interfaces ge-
Documentation Tasks for
EX Series
Release
Information
Configuring Gigabit Ethernet Interfaces
(CLI Procedure)
Note: This task uses Junos OS for EX Series switches with support
for the Enhanced Layer 2 Software (ELS) configuration style. If your
switch runs software that does not support ELS, see Configuring
Gigabit Ethernet Interfaces (CLI Procedure). For ELS details, see
Getting Started with Enhanced Layer 2 Software.
An Ethernet interface must be configured for optimal performance in a high-traffic network.
EX Series switches include a factory default configuration that:
Enables all the network interfaces on the switch
Sets a default interface mode (access)
Sets default link settings
Specifies a logical unit (uni t 0) and assigns it to f ami l y ether net-
swi t chi ng (except on EX8200 switches and Virtual Chassis)
Specifies Rapid Spanning Tree Protocol (RSTP) and Link Layer Discovery Protocol
(LLDP)
This topic describes:
Configuring VLAN Options and Interface Mode
Configuring the Link Settings
Configuring the IP Options
Configuring VLAN Options and Interface Mode
By default, when you boot a switch and use the factory default configuration, or when you
boot the switch and do not explicitly configure a port mode, all interfaces on the switch are
in access mode and accept only untagged packets from the VLAN named def aul t . You
can optionally configure another VLAN and use that instead of defaul t . You can also
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Design
Configure
Install
Operate
Troubleshoot
configure a port to accept untagged packets from the user-configured VLAN. For details on
this concept (native VLAN), see Understanding Bridging and VLANs on EX Series
Switches
If you are connecting either a desktop phone, wireless access point or a security camera to a
Power over Ethernet (PoE) port, you can configure some parameters for the PoE interface.
PoE interfaces are enabled by default. For detailed information about PoE settings, see
Configuring PoE (CLI Procedure).
If you are connecting a device to other switches and to routers on the LAN, you need to
assign the interface to a logical port and configure the logical port as a trunk port. See Port
Role Configuration with the J-Web Interface (with CLI References) for more information
about port configuration.
If you are connecting to a server that contains virtual machines and a VEPA for packet
aggregation from those virtual machines, configure the port as a tagged-access port. See
Understanding Bridging and VLANs on EX Series Switches for more information about
tagged access.
To configure a 1-Gigabit, 10-Gigabit, or 40-Gigabit Ethernet interface for trunk port mode:
[edi t ]
user @swi t ch# set i nt erf aces interface-name uni t logical-unit-number f ami l y et her net- swi t chi ng i nt erf ace- mode trunk
Configuring the Link Settings
EX Series switches include a factory default configuration that enables interfaces with the
link settings provided in Table 1.
Table 1: Factory Default Configuration Link Settings for EX Series Switches
Ethernet
InterfaceAutonegotiation
Flow
ControlLink Mode Link Speed
1 gigabit Enabled Enabled Autonegotiation
(full duplex or
half duplex)
Autonegotiation
(10 Mbps, 100
Mbps, or 1
Gbps)
10 gigabit
(using a
DAC
cable)
Enabled Enabled Full duplex 10 Gbps
10 gigabit
(using a
fiber-optic
cable)
Disabled Enabled Full duplex 10 Gbps
System Log
Explorer
XML API
Explorer New
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40 gigabit
(using a
DAC
cable)
Enabled Enabled Full duplex 40 Gbps
40 gigabit
(using a
fiber-optic
cable)
Disabled Enabled Full duplex 40 Gbps
Note: On EX4300 switches, the interfaces operate in full duplex
mode only.
To configure the link mode and speed settings for a 1-Gigabit, 10-Gigabit, or 40-Gigabit
Ethernet interface:
[edi t ]
user @swi t ch# set i nt erf aces interface-name
To configure additional link settings for a 1-Gigabit, 10-Gigabit, or 40-Gigabit Ethernet
interface:
[edi t ]
user @swi t ch# set i nt erf aces interface-name et her - opt i ons
For detailed information about the FPC, PIC, and port numbers used for EX Series switches,
see Understanding Interface Naming Conventions on EX Series Switches.
Configurable link settings include:
802. 3ad —Specify an aggregated Ethernet bundle. See Configuring Aggregated
Ethernet Links (CLI Procedure).
aut o-negot i ati on —Enable or disable autonegotation of flow control, link mode,
and speed.
f l ow- cont r ol —Enable or disable flow control.
l i nk- mode —Specify full duplex, half duplex, or autonegotiation. On EX4300
switches, the interfaces operate in full duplex mode only.
l oopback —Enable or disable loopback mode.
speed —Specify 10 Mbps, 100 Mbps, 1 Gbps, or autonegotiation.
Configuring the IP Options
To specify an IP address for the logical unit using IPv4:
[edi t ]
user @swi t ch# set i nt erf aces interface-name uni t logical-unit-
number f ami l y i net addr ess ip-address
To specify an IP address for the logical unit using IPv6:
[edi t ]
user @swi t ch# set i nt erf aces interface-name uni t logical-unit-
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number f ami l y i net6 addr ess ip-address
Note: Access interfaces on EX4300 switches are set to f ami l y
et her net- swi t chi ng by default. You might have to delete this
or any other user-configured family setting before changing the
setting to f ami l y i net or f ami l y i net 6.
Published: 2014-10-13
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