0001188: Ubuntu / NetworkManager / Linux kernel doesn't do DHCP after a 2 second link down - PacketFence

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Date Submitted

Last Update

0001188

PacketFence

upstream

public

2011-02-21 13:58

2011-03-03 15:25

Reporter

obilodeau

Assigned To

obilodeau

Priority

normal

Severity

major

Reproducibility

random

Status

closed

Resolution

fixed

Platform

OS Version

Product Version

Target Version

Fixed in Version

2.1.0

Summary

0001188: Ubuntu / NetworkManager / Linux kernel doesn't do DHCP after a 2 second link down

Description

We got report of this on the mailing list and we independently experienced it in our lab.

A 2 sec down / up is not long enough for Ubuntu to detect a link change and perform DHCP again.

I'm not sure why we haven't heard about this sooner.. Did it used to work? Is it a regression or not? If so, what in component?

I would think that it is in NetworkManager but it could be the kernel that is taking it's time to pass the information to userland.

The problem with raising the delay from 2 to 6 (for ex.) is that we affect all operating systems, even those who could be bounced quicker.

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No tags attached.

fixed in git revision

fixed in mtn revision

48e606bbc24225f730070db71166690c0c3b558f

Attached Files

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Notes
(0001873) obilodeau (reporter) 2011-02-21 14:00	work around for now: edit sbin/pfsetvlan on line 1625 (as of 2.0.1) and change sleep(2); with sleep(6); things should work afterwards

(0001890) obilodeau (reporter) 2011-03-01 17:42	Default bounce duration is now 4 seconds long which is enough for Ubuntu to see the linkdown. Also the value is configurable with bounce_duration under [vlan] in conf/pf.conf. Default value in conf/pf.conf.defaults.

Issue History
Date Modified	Username	Field	Change
2011-02-21 13:58	obilodeau	New Issue
2011-02-21 13:58	obilodeau	Status	new => assigned
2011-02-21 13:58	obilodeau	Assigned To	=> obilodeau
2011-02-21 14:00	obilodeau	Note Added: 0001873
2011-03-01 17:42	obilodeau	mtn revision	=> 48e606bbc24225f730070db71166690c0c3b558f
2011-03-01 17:42	obilodeau	Note Added: 0001890
2011-03-01 17:42	obilodeau	Status	assigned => resolved
2011-03-01 17:42	obilodeau	Fixed in Version	=> 2.0.2
2011-03-01 17:42	obilodeau	Resolution	open => fixed
2011-03-03 15:20	obilodeau	Fixed in Version	2.0.2 => 2.1.0
2011-03-03 15:25	obilodeau	Status	resolved => closed