Troubleshooting Guide - FarSync WAN T-Series - Linux Generic HDLC I/F

These possible additional interface enabling problems apply when using the Generic HDLC interface with kernel versions 2.4.13 and later only.

Configuration

PPP and Cisco HDLC

If you have any of these connection types then the configuration files should work as is by just renaming them from ifcfg-sync0 to ifcfg-hdlc0.

Frame Relay

Normally your ISP provider will supply you with the operating parameters you require. However, if you are experimenting and connecting two PC's together you should bear the following in mind.

• On end of the link should supply the line clock. At one end set CLOCK=ext in the ifcfg-hdlcX file.
• One end needs to be LMI DTE and the other LMI dce. At one end set DCE=y in the ifcfg-hdlcX file.
• Use dlci number of 16 and above. You are not prevented using any dlci, but remember that some are reserved.
• If your ISP only supports Cisco's LMI protocol, then turn off LMI altogether. set LMI=none in the ifcfg-hdlcX file.