How to transport non-IP based protocol over the IP network? Example a pc wants to send serial data to remote pc which is receiving only serial data over the WAN link, the WAN could be a frame-relay.
Cisco provides a tunneling technique known as serial tunneling or STUN in short. I could not test the configuration because I took the wrong serial cables for the second pc…
My objective is simple, PC on the left is able to send serial data over to PC on the right, I could use hyperterminal or modbus simulator to proof the configuration.
For ease of testing, back to back frame-relay is used.
Back-to-back frame relay
interface Serial0/1
bandwidth 64
no ip address
encapsulation frame-relay
no keepalive
clock rate 64000
end
interface Serial0/1.300 point-to-point
ip address 192.168.10.9 255.255.255.0
frame-relay interface-dlci 300
end
Configuration except for the ip address is the same for both routers.
STUN configuration
stun peer-name 192.168.10.9
stun protocol-group 1 sdlc
interface Serial0/2
mtu 2104
no ip address
encapsulation stun
no shutdown
clock rate 64000
bandwidth 64
stun group 1
stun route address C1 interface Serial0/1 dlci 300
end
The stun peer-name can be the reliable ip address of a loopback address, since loopback does not go down unless the router is turned off. The configuration except for stun peer-name is the same for both routers.
This configuration is yet to be tested, because I have brought back incorrect cable.
cyruslab 