Juniper EX3400 Features Manual page 349

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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.
You can also use the helpers
on custom UDP ports to particular servers as unicast traffic. Configure the UDP port
number and optionally an interface on which to listen for broadcast traffic, and the
destination server address to receive that traffic, as shown in either of the following
sample configurations:
user@ host# show forwarding-options
helpers {
port 1200 {
server 10.20.30.40;
}
}
user@ host# show forwarding-options
helpers {
port 3000 {
interface {
fe-0/0/1.0 {
server 192.0.2.2;
}
}
}
port 3001 {
interface {
fe-0/0/0.0 {
server 192.0.2.2;
}
}
}
}
The remaining statements are explained separately. See
interface—To view this statement in the configuration.
interface-control—To add this statement to the configuration.
Configuring DNS and TFTP Packet Forwarding
Configuring Port-based LAN Broadcast Packet Forwarding on page 133
Configuring Routers, Switches, and Interfaces as DHCP and BOOTP Relay Agents
Chapter 13: Configuration Statements (Forwarding Options)
statement to enable forwarding LAN broadcast traffic
port
.
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