Specifications

Configuring Asynchronous Serial Traffic over UDP
How to Configure Asynchronous Serial Traffic over UDP
DC-45
Cisco IOS Dial Technologies Configuration Guide
This feature is particularly useful for broadcast, multicast, and unstable point-to-point connections. This
feature may not work as expected when there are multiple users on the same port number in a
nonmulticast environment. The same port must be used for both receiving and sending.
How to Configure Asynchronous Serial Traffic over UDP
To configure the Asynchronous Serial Traffic over UDP feature, perform the tasks described in the
following sections:
• Preparing to Configure Asynchronous Serial Traffic over UDP (Required)
• Configuring a Line for UDPTN (Required)
• Enabling UDPTN (Required)
• Verifying UDPTN Traffic (Optional but Recommended)
See the “Configuration Examples for UDPTN” section at the end of this chapter for multicast, broadcast,
and point-to-point UDPTN configuration examples.
Preparing to Configure Asynchronous Serial Traffic over UDP
When configuring the Asynchronous Serial Traffic over UDP feature for multicast transmission, you
must configure IP multicast routing for the entire network that will receive or propagate the multicasts.
When configuring the feature for broadcast transmission, you must configure broadcast flooding on the
routers between network segments. Refer to the “Configuring IP Multicast Routing” chapter of this
guide for information on how to configure IP multicast routing. See the section “Configuring Broadcast
Packet Handling” in the Cisco IOS IP Configuration Guide for information on how to configure
broadcast flooding.
Configuring a Line for UDPTN
To configure the line that will be used to send or receive UDP packets, use the following commands
beginning in global configuration mode:
Command Purpose
Step 1
Router(config)# line line-number
Enters line configuration mode for the line number
specified.
Step 2
Router(config-line)# transport output udptn
Enables the line to transport UDP packets.
Step 3
Router(config-line)# dispatch-timeout 1000
Sends packets every 1000 milliseconds.
Step 4
Router(config-line)# dispatch-character 13
Sends packets after every new line.
Step 5
Router(config-line)# no session-timeout
Disables timeout connection closing.