Re: What's going on with dhcp?

[Dan Williams <dcbw redhat com>]

On Wed, 2010-09-29 at 07:55 -0400, Neal Becker wrote:
> Ah, yesterday:
> Sep 28 07:06:01 nbecker1 NetworkManager[6828]: <info>   address 
> 10.32.112.161
> 
> Then the machine went to sleep, and when woken today it negotiated a new IP 
> address, but for some reason nobody told the ethernet adaptor.

Hmm, could be a bug in the netlink address code.  The code checks to see
if the address is already assigned to the interface so we don't bounce
addresses during updates like this.  You can debug this further by:

NetworkManager --log-level=debug

and see what we get in the logs when this problem occurs.  There should
be a bunch of spew when NM touches the interface's address tables.

Dan

> Neal Becker wrote:
> 
> > fedora 13 x86_64
> > 
> > These are the last logged messages:
> > 
> > Sep 29 07:37:11 nbecker1 NetworkManager[6828]: <info> (eth0): DHCPv4 state
> > changed preinit -> bound
> > Sep 29 07:37:11 nbecker1 NetworkManager[6828]: <info>   address
> > 10.32.112.150
> > Sep 29 07:37:11 nbecker1 NetworkManager[6828]: <info>   prefix 24
> > (255.255.255.0)
> > Sep 29 07:37:11 nbecker1 NetworkManager[6828]: <info>   gateway
> > 10.32.112.1
> > Sep 29 07:37:11 nbecker1 NetworkManager[6828]: <info>   nameserver
> > '139.85.52.104'
> > Sep 29 07:37:11 nbecker1 NetworkManager[6828]: <info>   nameserver
> > '139.85.52.102'
> > Sep 29 07:37:11 nbecker1 NetworkManager[6828]: <info>   nameserver
> > '139.85.87.105'
> > Sep 29 07:37:11 nbecker1 NetworkManager[6828]: <info>   nameserver
> > '139.85.176.102'
> > Sep 29 07:37:11 nbecker1 NetworkManager[6828]: <info>   domain name
> > 'hughes.com'
> > Sep 29 07:37:11 nbecker1 dhclient[6832]: bound to 10.32.112.150 -- renewal
> > in 37914 seconds.
> > Sep 29 07:37:11 nbecker1 NetworkManager[6828]: <info> Policy set 'System
> > eth0' (eth0) as default for IPv4 routing and DNS.
> > Sep 29 07:37:11 nbecker1 NetworkManager[6828]: <info> Updating /etc/hosts
> > with new system hostname
> > Sep 29 07:37:11 nbecker1 nm-dispatcher.action: nm_dispatcher_action:
> > Invalid connection: '(null)' / 'connection setting not found' invalid: 1
> > 
> > That says eth0 is 10.32.112.150 (and dnslooksup says that too), but look:
> > 
> > ifconfig eth0
> > eth0      Link encap:Ethernet  HWaddr 00:23:8B:53:F0:80
> >           inet addr:10.32.112.161  Bcast:10.32.112.255  Mask:255.255.255.0
> >           inet6 addr: fe80::223:8bff:fe53:f080/64 Scope:Link
> >           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
> >           RX packets:2315199 errors:0 dropped:0 overruns:0 frame:0
> >           TX packets:3274370 errors:0 dropped:0 overruns:0 carrier:0
> >           collisions:0 txqueuelen:1000
> >           RX bytes:729169802 (695.3 MiB)  TX bytes:3988312791 (3.7 GiB)
> >           Interrupt:29
> > 
> > What's going on?
> 
> 
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