ip forward-protocol

broadcast only on the 30 network interface will allow anyone from any other networks (10, 20, 40, 50) to send directed broadcast to the 30 network.

Example

This example shows how to enable IP directed broadcasts on VLAN 1:

C3(su)->router(Config)#interface vlan 1

C3(su)->router(Config-if(Vlan 1))#ip directed-broadcast

ip forward-protocol

Use this command to enable UDP broadcast forwarding and specify which protocols will be forwarded.

Syntax

ip forward-protocol udp [port]

no ip forward-protocol udp [port]

Parameters

udp

Specifies UDP as the IP forwarding protocol.

port

(Optional) Specifies a destination port that controls which UDP services

 

are forwarded.

 

 

Defaults

If port is not specified, the following defaults are used:

Trivial File Transfer Protocol (TFTP) (port 69)

Domain Naming System (port 53)

Time service (port 37)

NetBIOS Name Server (port 137)

NetBIOS Datagram Server (port 138)

TACACS service (port 49)

EN‐116 Name Service (port 42)

Mode

Router command, Global configuration: C3(su)‐>router(Config)#

Router interface configuration: C3(su)‐>router(Config‐if(Vlan 1)#

Usage

In order to actually forward protocols, you must configure an IP helper address on the individual router interfaces with the command ip helper‐address” (page 19‐18).

If a certain service exists inside the node, and there is no need to forward the request to remote networks, the “no” form of this command should be used to disable the forwarding for the specific port. Such requests will not be automatically blocked from being forwarded just because a service for them exists in the node.

The no form of this command removes a UDP port or protocol, disabling forwarding.

SecureStack C3 Configuration Guide 19-17

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Enterasys Networks 9034313-07 manual Ip forward-protocol, Udp, Specifies UDP as the IP forwarding protocol, Are forwarded