Bug 799728 - NM marks network connection unavailable after dhcp lease timeout
NM marks network connection unavailable after dhcp lease timeout
Product: Fedora
Classification: Fedora
Component: NetworkManager (Show other bugs)
Unspecified Linux
unspecified Severity high
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Assigned To: Dan Williams
Fedora Extras Quality Assurance
Depends On:
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Reported: 2012-03-04 12:30 EST by John Bass
Modified: 2013-02-13 08:53 EST (History)
1 user (show)

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Doc Type: Bug Fix
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Last Closed: 2013-02-13 08:53:36 EST
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Description John Bass 2012-03-04 12:30:57 EST
Description of problem:

When there is a network interruptions that prevents a dhcp lease renewal, NM marks the connection unavailable/down and fails to retry later after external network problem has been resolved. This leaves EVERY dhcp client in a network offline until there is a physical intervention.

Version-Release number of selected component (if applicable):

This appears to happen in all/most releases with NM (we are running F10, F14, F15 and F16)

How reproducible:

Everytime there is a dhcp outage longer than the lease renewal period.

Steps to Reproduce:
1. Startup a dhcp client system connected to an ethernet switch with connectivity to the dhcp server.
2. disable the dhcp server access, but keep the ethernet connection to the switch stable.
3. wait for the dhcp lease to expire
Actual results:

the network connection will become disabled, and will not automatically resume after the dhcp server is available.

Expected results:

the dhcp client system will poll for the dhcp server periodically, and re-enable the network connection within a reasonably short time after the network outage is resolved.

Additional info:

This can AND DOES bring down every server and client in a facility requiring manual intervention to restart the network connections on every machine.

power cycling every ethernet switch in the building, will take the ethernet link down, and back up, and will restore service ... or it requires manually disabling the ethernet port from the console and re-enabling it.

this is not acceptable ... and leads to manually assigning static IP addresses for every server and client as a work-around.
Comment 1 Fedora End Of Life 2013-01-16 08:11:39 EST
This message is a reminder that Fedora 16 is nearing its end of life.
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Comment 2 Fedora End Of Life 2013-02-13 08:53:38 EST
Fedora 16 changed to end-of-life (EOL) status on 2013-02-12. Fedora 16 is 
no longer maintained, which means that it will not receive any further 
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