Ubuntu
network-manager package

network (ethernet and wifi) disconnect about every 10 minutes

Bug #1000822 reported by Andy Whitcroft on 2012-05-17

This bug report is a duplicate of: Bug #993571: Wifi disconnect/reconnects fairly often (from multiple times an hour to multiple times per day) because of ip-config-unavailable. Edit Remove

This bug affects 1 person

Affects		Status	Importance	Assigned to	Milestone
	network-manager (Ubuntu)	New	Undecided	Unassigned

Bug Description

I am seeing regular networking drops, these occur on a 10 minute repeating pattern. The issue does not always occur on every 10 minute boundary but any occurances are on that 10 minute boundary. This is a dual-stack IPv4 and IPv6 network. The issue does not appear to be triggered by anything physical, as a number of machines are affected and trigger asyncronously from each other.

Each event starts with network manager saying the following:

May 17 16:29:13 chloe NetworkManager[1059]: <debug> [1337268553.691716] [nm-ip6-manager.c:898] process_nduseropt_rdnss(): (eth0): refreshing RA-provided nameserver 2001:470:20::2 (expires in 610 seconds)
May 17 16:29:18 chloe NetworkManager[1059]: <debug> [1337268558.620868] [nm-ip6-manager.c:403] rdnss_expired(): (eth0): IPv6 RDNSS information expired

Revision history for this message

Andy Whitcroft (apw) wrote on 2012-05-17:

syslog with debug enabled (in the later occurances) Edit (533.0 KiB, text/plain)

Revision history for this message

Thomas Hood (jdthood) wrote on 2012-05-25:

Network connectivity is suspended during DHCP lease negotiation. This is ungood, yes, but not a big problem if the negotiation doesn't happen very often.

Part of the problem in your case is that your DHCP lease time is very short.

> May 17 12:01:15 chloe dhclient: bound to 192.168.2.21 -- renewal in 229 seconds.

In my employer's network it's 250000 seconds.

Revision history for this message

Thomas Hood (jdthood) wrote on 2012-05-31:

Is it a bug that network connectivity is suspended during DHCP lease negotiation, or is that for some reason inevitable?

Revision history for this message

Mathieu Trudel-Lapierre (cyphermox) wrote on 2012-05-31:

That was a duplicate of bug 993571; closing.