Troubleshooting guide:

Additional interface-enabling problems

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

Interface enabling

Troubleshooting Additional Interface problems
Problem SymptomPossible Cause(s)Action
My Interface won't come up.ifcfg-hdlcX contain template information only

Copy your existing ifcfg-syncX files over the default ifcfg-hdlcX files.

ONBOOT=no

Make sure the ONBOOT parameter is set to yes