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helpers
Syntax
helpers {bootp {client-response-ttl number;description text-description;interface interface-group {client-response-ttl number;description text-description;maximum-hop-count number;minimum-wait-time seconds;no-listen;server address {logical-system logical-system-name <routing-instance [ <default> routing-instance-names ]>;routing-instance [ <default> routing-instance-names ];}}maximum-hop-count number;minimum-wait-time seconds;relay-agent-option;server address {logical-system logical-system-name <routing-instance [ <default> routing-instance-names ]>;routing-instance [ <default> routing-instance-names ];}}domain {description text-description;interface interface-name {broadcast;description text-description;no-listen;server address <logical-system logical-system-name> <routing-instance routing-instance-name>;}server address <logical-system logical-system-name> <routing-instance routing-instance-name>;}port (Packet Forwarding) port-number {description text-description;interface interface-name {broadcast;description text-description;no-listen;server address <logical-system logical-system-name> <routing-instance routing-instance-name>;}server address <logical-system logical-system-name> <routing-instance routing-instance-name>;}tftp {description text-description;interface interface-name {broadcast;description text-description;no-listen;server address <logical-system logical-system-name> <routing-instance routing-instance-name>;}server address <logical-system logical-system-name> <routing-instance routing-instance-name>;}traceoptions {file filename <files number> <match regular-expression> <size bytes> <world-readable | no-world-readable>;flag flag;level level;no-remote-trace level;}}
Hierarchy Level
[edit forwarding-options]
Release Information
Statement introduced before Junos OS Release 7.4.
Statement introduced in Junos OS Release 9.0 for EX Series switches.
Description
Enable TFTP or DNS request packet forwarding, or configure the router, switch, or interface to act as a DHCP/BOOTP relay agent. Use only one server address per interface or global configuration.
In addition to TFTP and DNS, you can use the helpers statement to enable LAN-Broadcast forwarding. To do this, you must manually define which UDP port is forwarded, as shown here:
user@ host# show forwarding-options
helpers {port 3000 {interface {fe-0/0/1.0 {server 111.0.0.2;}}}port 3001 {interface {fe-0/0/0.0 {server 100.0.0.2;}}}}
The remaining statements are explained separately.
Required Privilege Level
interface—To view this statement in the configuration.
interface-control—To add this statement to the configuration.
