Loopback over LLC2 (LAN Links)

The LLC2 layer supports loopback by default, using the loopback SAP of 70. To test a loopback connection over LLC2, simply specify your LLC2 link number, MAC address, and SAP address of 70 as arguments to the pad program. For example, if your LLC2 link number is 1 and your MAC (Ethernet) address is 8:0:20:ab:21:6, enter:

% pad 1.080020ab210670
 Break-in sequence is `^Pa'

 Connecting...
 Connected
 Solstice X.29 Terminal Service
 login:

You can also set up entries for your LLC2 loopback interface in your PAD hosts database. See "Configuring the PAD Hosts Database" for instructions. In the PAD Hosts Database window, you need enter values only for the Host Name, Remote Address (your MAC address plus 70), and Link Number parameters.

To observe LLC2 protocol activity over the loopback interface, you can, as root, enter an x25trace command such as:

# /opt/SUNWconn/bin/x25trace -i /dev/llc2

See "Obtaining Packet and Link-Level Traces" for instructions on the use of x25trace.