Red Hat Bugzilla – Bug 245210
"ifup eth1" generates abort messages re eth0, an disconnected device
Last modified: 2014-03-16 23:07:27 EDT
Description of problem: When the NetworkManager is started as a boot service, I believe it runs the "ifup" script for all system devices, even if the device is not plugged in. There is, in fact, a bug in the "ifup" script (or some program invoked by that script) that causes an "ifup eth1" to attempt to access eth0 even when the cable to that device is unplugged. Since the script waits for the attempted access to the disconnected device to time-out before doing the requested "ifup eth1" there is a delay of a couple of minutes at the end of the boot process, with the screen blanked. Version-Release number of selected component (if applicable): How reproducible: Every boot Steps to Reproduce: 1.Run "/sbin/ifup eth1" with eth0 unplugged 2. 3. Actual results: [root ~]# ifdown eth1 External network device eth0 is not ready. Aborting.. [root ~]# ifup eth1 Determining IP information for eth1...External network device eth0 is not ready. Aborting.. External network device eth0 is not ready. Aborting.. done. [root ~]# Expected results: [root ~]# ifdown eth1 [root ~]# ifup eth1 done. [root ~]# Additional info: The system on which I'm running is a laptop with "eth0" a built-in cabled ethernet connection, and eth1 a wireless device.
Hmm; NM doesn't run ifup/ifdown at all but handles the device configuration directly. You may be thinking about the 'network' system service, which is something different.
No. The problem is visible when ifup is run, but ifup does invoke other programs which, I suspect, may also be invoked by NM. The point is not which top-level program is causing the hang on boot, but which network start-up script (or program) used by the top-level program (or some child of the top-level program) is ignoring the device argument and accessing all possible devices. I posted this bug to NM because NM (when started as a service) caused the boot process to appear to hang, and mentioned ifup because that script showed the same symptom and I thought that starting form there would be simpler than tracing the problem from the service start up. Note: The problem may have been resolved in F8 since I can't recall seeing it since I moved to F8 from FC7.
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