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interface

See the following sections:

interface (Accounting or Sampling)

Syntax



interface [ interface-names ] {
engine-id number;
engine-type number;
source-address address;
}

Hierarchy Level



[edit forwarding-options accounting group-name  output],
[edit forwarding-options sampling  output]

Release Information

Statement introduced before JUNOS Release 7.4.

Description

Specify the output interface for sending copies of packets elsewhere to be analyzed.

Options

interface-names—Name of one or more accounting interfaces.
engine-id number—Identity of the accounting interface.
engine-type number—Type of this accounting interface.
source-address address—Address used for generating packets.

Usage Guidelines

See Configuring Discard Accounting and Configuring Traffic Sampling Output.

Required Privilege Level

interface—To view this statement in the configuration.

interface-control—To add this statement to the configuration.

interface (BOOTP)

Syntax



interface interface-group {
client-response-ttl number;
description description-of-interface;
maximum-hop-count number;
minimum-wait-time seconds;
no-listen;
server [ addresses ];
}

Hierarchy Level



[edit forwarding-options helpers bootp]

Release Information

Statement introduced before JUNOS Release 7.4.

Description

Specify the interface for a DHCP or BOOTP relay agent.

Options

interface-group—Sets a logical interface or group of logical interfaces with a specific DHCP relay configuration.
The remaining statements are explained separately.

Usage Guidelines

See Configuring the Router or Interface to Act as a DHCP/BOOTP Relay Agent.

Required Privilege Level

interface—To view this statement in the configuration.

interface-control—To add this statement to the configuration.

interface (DHCP Relay Agent)

Syntax



interface interface-name [upto upto-interface-name] [exclude];

Hierarchy Level



[edit forwarding-options dhcp-relay group group-name],
[edit logical-systems logical-system-name forwarding-options dhcp-relay group group-name],
[edit logical-systems logical-system-name routing-instances routing-instance-name forwarding-options dhcp-relay group group-name],
[edit routing-instances routing-instance-name forwarding-options dhcp-relay group group-name]

Release Information

Statement introduced in JUNOS Release 8.3.

upto and exclude options introduced in JUNOS Release 9.1.

Description

Specify one or more interfaces, or a range of interfaces, that are within a specified group on which the DHCP local server is enabled. You can repeat the interface interface-name statement to specify multiple interfaces within a group, but you cannot specify the same interface in more than one group. Also, you cannot use an interface that is being used by the DHCP relay agent.

Options

exclude—Exclude an interface or a range of interfaces from the group.
inteface-name—The name of the interface. You can repeat this keyword multiple times.
upto-interface-name—The upper end of the range of interfaces; the lower end of the range is the interface-name entry. The interface device name of the upto-interface-name must be the same as the device name of the interface-name.

Usage Guidelines

See Configuring the Extended DHCP Relay Agent and Using External AAA Authentication Services.

Required Privilege Level

interface—To view this statement in the configuration.

interface-control—To add this statement to the configuration.

interface (DHCP Snooping)

Syntax



interface interface-name;

Hierarchy Level



[edit routing-instances routing-instance-name forwarding-options dhcp-relay group group-name interface interface-name]
[edit routing-instances routing-instance-name bridge-domain bridge-domain-name forwarding-options dhcp-relay group group-name interface interface-name]

Release Information

Statement supported on MX-series routers starting in JUNOS Release 9.4.

Description

Configure Dynamic Host Configuration Protocol (DHCP) snooping on the router. When acting as a snooping agent, the MX-series router typically is located between the client and the DHCP relay agent. It creates filters by “snooping” DHCP messages and binding DHCP-issued IP addresses with the MAC address of the client. These filters help prevent DHCP spoofing.

DHCP snooping is configured by including the appropriate interfaces.

Usage Guidelines

See Preventing DHCP Spoofing (MX-series Routers Only).

Required Privilege Level

interface—To view this statement in the configuration.

interface-control—To add this statement to the configuration.

interface (DNS and TFTP Packet Forwarding or Relay Agent)

Syntax



interface interface-name {
description description-of-service;
no-listen;
server address < [ routing-instance routing-instance-names ] >;
}

Hierarchy Level



[edit forwarding-options helpers domain],
[edit forwarding-options helpers tftp]

Release Information

Statement introduced before JUNOS Release 7.4.

Description

Specify the interface for monitoring and forwarding DNS or TFTP requests.

Options

interface-name—Name of the interface.
The remaining statements are explained separately.

Usage Guidelines

See Configuring DNS and TFTP Packet Forwarding.

Required Privilege Level

interface—To view this statement in the configuration.

interface-control—To add this statement to the configuration.

interface (Monitoring)

Syntax



interface interface-name {
engine-id number;
engine-type number;
input-interface-index number;
output-interface-index number;
source-address address;
}

Hierarchy Level



[edit forwarding-options monitoring group-name family inet output]

Release Information

Statement introduced before JUNOS Release 7.4.

Description

Specify the output interface for monitored traffic.

Options

interface-name—Name of the interface.
engine-id number—Identity of the monitoring interface.
engine-type number—Type of this monitoring interface.
input-interface-index number—Input interface index for records from this interface.
output-interface-index number—Output interface index for records from this interface.
source-address address—Address used for generating packets.

Usage Guidelines

See Configuring Flow Monitoring.

Required Privilege Level

interface—To view this statement in the configuration.

interface-control—To add this statement to the configuration.

interface (Next-Hop Group)

Syntax



interface interface-name {

next-hop [ addresses ];
}

Hierarchy Level



[edit forwarding-options next-hop-group group-names]

Release Information

Statement introduced before JUNOS Release 7.4.

Description

Specify the output interface for sending copies of packets elsewhere to be analyzed.

Options

interface-name—Name of the interface.
The remaining statements are explained separately.

Usage Guidelines

See Configuring a Next-Hop Group.

Required Privilege Level

interface—To view this statement in the configuration.

interface-control—To add this statement to the configuration.

interface (Port Mirroring)

Syntax



interface interface-name {

next-hop address;
}

Hierarchy Level



[edit forwarding-options port-mirroring output],
[edit forwarding-options port-mirroring family (inet | inet6) output]

Release Information

Statement introduced before JUNOS Release 7.4.

Description

Specify the output interface for sending copies of packets elsewhere to be analyzed.

Options

interface-name—Name of the interface.
The remaining statements are explained separately.

Usage Guidelines

See Configuring Port Mirroring.

Required Privilege Level

interface—To view this statement in the configuration.

interface-control—To add this statement to the configuration.

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