Specifications

Configuring Asynchronous Serial Traffic over UDP
Configuration Examples for UDPTN
DC-48
Cisco IOS Dial Technologies Configuration Guide
Broadcast UDPTN Example
These configurations are for broadcast UDPTN. This is the simplest method to send to multiple
receivers. The broadcasting router sends to the broadcast IP address, and any router that wants to receive
the transmission simply connects to the broadcast IP address by using the udptn command.
Router That Is Broadcasting
interface ethernet 0
ip address 10.1.1.1 255.255.255.0
!
line 5
no session-timeout
transport output udptn
dispatch-timeout 10000
dispatch-character 13
modem in
autocommand udptn 255.255.255.255 /transmit
Receiving Routers
interface ethernet 0
ip address 10.99.98.97 255.255.255.192
!
line 0 16
transport output udptn telnet lat rlogin
autocommand udptn 255.255.255.255 /receive
Point-to-Point UDPTN Example
These configurations are for two routers in mobile, unstable environments that wish to establish a
bidirectional asynchronous tunnel. Because there is no way to ensure that both routers will be up and
running when one of the routers wants to establish a tunnel, they cannot use connection-dependent
protocols like Telnet or local area transport (LAT). They instead use the following UDPTN
configurations. Each router is configured to send to and receive from the IP address of the other. Because
both routers will be sending and receiving, they do not use the /transmit or /receive keywords with the
udptn command.
Router A
interface ethernet 0
ip address 10.54.46.1 255.255.255.192
!
line 5
no session-timeout
transport output udptn
dispatch-timeout 10000
dispatch-character 13
modem in
autocommand udptn 10.54.46.2