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JUNOS 10.1 Network Interfaces Configuration Guide
Table 23: Statements for Logical Interface Properties (continued)
Statement
vci-range
vpi vpi-identifier
vlan-id number
vlan-tags inner tpidvlan-id
outer tpidvlan-id
watch-list
Specifying the Logical Interface Number
Each logical interface must have a logical unit number. The logical unit number
corresponds to the logical unit part of the interface name. For more information, see
"Interface Naming Overview" on page 52.
Point-to-Point Protocol (PPP), Cisco High-level Data Link Control (HDLC), and Ethernet
circuit cross-connect (CCC) encapsulations support only a single logical interface,
whose logical unit number must be 0. Frame Relay and ATM encapsulations support
multiple logical interfaces, so you can configure one or more logical unit numbers.
You specify the logical unit number by including the
You can include this statement at the following hierarchy levels:
The logical unit number can be from 0 through 16,384.
Configuring Logical System Interface Properties
With JUNOS Software, you can partition a single physical router into multiple logical
devices that perform independent routing tasks. Because logical systems perform a
subset of the tasks once handled by the physical router, logical systems offer an
effective way to maximize the use of a single router.
You can include the following logical system statements:
166
Specifying the Logical Interface Number
Interface Types
ATM2 IQ interfaces
ATM1 and ATM2 IQ point-to-point
interfaces
Fast Ethernet, Gigabit Ethernet, and
Gigabit Ethernet IQ interfaces and
aggregated Ethernet using Gigabit Ethernet
IQ interfaces
Gigabit Ethernet IQ interfaces
ISDN interfaces
unit logical-unit-number {
...
}
[edit interfaces interface-name]
[edit logical-systems logical-system-name interfaces interface-name]
Usage Guidelines
"Configuring ATM-to-Ethernet
Interworking" on page 236
"Configuring a Point-to-Point ATM1 or
ATM2 IQ Connection" on page 324
"Binding VLAN IDs to Logical Interfaces"
on page 624 and "Rewriting the VLAN Tag
on Tagged Frames" on page 675
"Configuring Dual VLAN Tags" on page 669
"Configuring Dialer Watch" on page 887
statement:
unit
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