network (ethernet and wifi) disconnect about every 10 minutes

Bug #1000822 reported by Andy Whitcroft on 2012-05-17
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
network-manager (Ubuntu)
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

Thomas Hood (jdthood) wrote :

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.

Thomas Hood (jdthood) wrote :

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

That was a duplicate of bug 993571; closing.

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