interface (DNS, Port, and TFTP Packet Forwarding or Relay Agent)
Syntax
interface interface-name {
broadcast;
description text-description;
no-listen;
server address <logical-system logical-system-name> <routing-instance routing-instance-name>;
}
Hierarchy Level
[edit forwarding-options helpers domain], [edit forwarding-options helpers port port-number], [edit forwarding-options helpers tftp]
Description
Specify the interface for monitoring and forwarding DNS or TFTP requests, or for forwarding LAN broadcast traffic on a custom UDP port to a particular server as unicast traffic.
When configuring port helpers, in releases prior to Junos OS Release 17.2, only one server can be specified for a given port. For Junos OS Release 17.2 and later, multiple servers can be specified for a given port at the global or interface-specific level. In this case, the same packet, with the originator IP address and port requests, is forwarded to the different configured servers; the payload of the UDP packet is not modified.
Options
interface-name—Name of the interface.
The remaining statements are explained separately. See CLI Explorer.
Required Privilege Level
interface—To view this statement in the configuration.
interface-control—To add this statement to the configuration.
Release Information
Statement introduced before Junos OS Release 7.4.
Statement introduced for port helpers in Junos OS Release 17.2R1 for EX4300 switches.
Support for multiple server instances for a given port introduced in Junos OS Release 17.2 for MX Series routers.
Support for multiple server instances for a given port introduced in Junos OS Release 17.3R1 for EX9200 switches.