Special Interfaces; Table 161: Special Interface Types And Purposes - Juniper JUNOS OS 10.3 - SOFTWARE Manual

Complete Software Guide for Junos
Table 160: Network Interface Types and Purposes (continued)
Type
LAN access interfaces
Power over Ethernet (PoE)
interfaces
Trunk interfaces

Special Interfaces

Table 161: Special Interface Types and Purposes

Type
Console port
Loopback
Management interface
Routed VLAN Interface (RVI)
1096
®
OS for EX Series Ethernet Switches, Release 10.3
Purpose
Use these EX Series switch interfaces to connect a personal computer, laptop, file server, or
printer to the network. When you power on an EX Series switch and use the factory-default
configuration, the software automatically configures interfaces in access mode for each of the
network ports. The default configuration also enables autonegotiation for both speed and link
mode.
EX Series switches provide PoE network ports with various switch models. These ports can be
used to connect voice over IP (VoIP) telephones, wireless access points, video cameras, and
point-of-sale devices to safely receive power from the same access ports that are used to
connect personal computers to the network. PoE interfaces are enabled by default in the factory
configuration.
EX Series access switches can be connected to a distribution switch or customer-edge (CE)
switches or routers. To use a port for this type of connection, you must explicitly configure the
port interface for trunk mode. The interfaces from the distribution switch or CE switch to the
access switches must also be configured for trunk mode.
Table 161 on page 1096 lists the types of special interfaces supported on EX Series switches.
Purpose
Each EX Series switch has a serial port, labeled
terminals to the switch using standard PC-type tty cables. The console port does not have a
physical address or IP address associated with it. However, it is an interface in the sense that
it provides access to the switch. On EX4200 switches that are configured as a Virtual Chassis,
you can access the master and configure all members of the Virtual Chassis through any
member's console port. For more information on the console port in a Virtual Chassis, see
"Understanding Global Management of a Virtual Chassis Configuration" on page 929.
All EX Series switches have this software-only virtual interface that is always up. The loopback
interface provides a stable and consistent interface and IP address on the switch.
The Juniper Networks Junos operating system (Junos OS) for EX Series switches automatically
creates the switch's management Ethernet interface,
provides an out-of-band method for connecting to the switch. To use
port, you must configure its logical port,
management interface over the network using utilities such as SSH or Telnet. SNMP can use
the management interface to gather statistics from the switch. (The management interface
is analogous to the
me0 fxp0
EX Series switches use a Layer 3 routed VLAN interface (RVI) named
one broadcast domain to another and to perform other Layer 3 functions such as traffic
engineering. These functions are typically performed by a router interface in a traditional network.
The RVI functions as a logical router, eliminating the need for having both a switch and a router.
The RVI (the interface) must be configured as part of a broadcast domain or virtual private
vlan
LAN service (VPLS) routing instance for Layer 3 traffic to be routed out of it.
or
CON CONSOLE
. The management Ethernet interface
me0
, with a valid IP address. You can connect to the
me0.0
interfaces on routers running Junos OS.)
Copyright © 2010, Juniper Networks, Inc.
, for connecting tty-type
as a management
me0
to route traffic from
vlan