UDP Broadcast Configuration Examples

This example shows how to enable forwarding of Domain Naming System UDP datagrams (port 53):

System(rw-config)->ip forward-protocol udp 53

This example shows how to enable forwarding of Domain Naming System UDP datagrams (port 53) by naming the protocol:

System(rw-config)->ip forward-protocol udp domain

Configuring IP Broadcast describes how to configure IP broadcast.

Configuring IP Broadcast

Step	Task	Command(s)
1	In interface configuration command mode, enable IP directed broadcasts on an interface.	ip directed-broadcast
2	In configuration command mode, optionally, enable UDP broadcast forwarding and specify the destination port number or keyword that controls the forwarding protocol. `port` - 1 - 65535 bootps - Specifies the Bootstrap Protocol server (67) port. domain - Specifies the Domain Name Service (53) port. nameserver - Specifies the IEN116 name service (42) port. netbios-dgm - Specifies the NetBIOS datagram service (138) port. netbios-ns - Specifies the NetBIOS name service (137) port. tacacs - Specifies the Terminal Access Controller Access Control System (49) port. tftp - Specifies the Trivial File Transfer Protocol (69) port. time - Specifies the Time (37) port.	ip forward-protocol udp [port]
3	In interface configuration command mode, optionally, enable DHCP/BOOTP relay and the forwarding of local UDP broadcasts, specifying a new destination address.	ip helper-address address
4	In global or interface configuration command mode, optionally insert relay agent information option 82 and its sub-options into the relay agent DHCP packet.	See DHCP Relay Agent Information Options.

Published May 2016prev | next