Log (daemon.log) for a problem case. Note the interleaving of eth0 and eth1 events.
Nov 7 14:07:27 apple ifplugd(eth0)[27270]: Link beat detected. Nov 7 14:07:27 apple ifplugd(eth0)[27270]: Executing '/etc/ifplugd/ifplugd.action eth0 up'. Nov 7 14:07:27 apple ifplugd(eth0)[27270]: client: OK Nov 7 14:07:27 apple wpa_supplicant[1536]: CTRL-EVENT-DISCONNECTED bssid=00:00:00:00:00:00 reason=0 Nov 7 14:07:28 apple dhclient: Internet Systems Consortium DHCP Client 4.2.2 Nov 7 14:07:28 apple ifplugd(eth0)[27270]: client: Internet Systems Consortium DHCP Client 4.2.2 Nov 7 14:07:28 apple dhclient: Copyright 2004-2011 Internet Systems Consortium. Nov 7 14:07:28 apple ifplugd(eth0)[27270]: client: Copyright 2004-2011 Internet Systems Consortium. Nov 7 14:07:28 apple dhclient: All rights reserved. Nov 7 14:07:28 apple ifplugd(eth0)[27270]: client: All rights reserved. Nov 7 14:07:28 apple dhclient: For info, please visit https://www.isc.org/software/dhcp/ Nov 7 14:07:28 apple ifplugd(eth0)[27270]: client: For info, please visit https://www.isc.org/software/dhcp/ Nov 7 14:07:28 apple dhclient: Nov 7 14:07:28 apple dhclient: Listening on LPF/eth0/00:0a:e4:26:95:59 Nov 7 14:07:28 apple dhclient: Sending on LPF/eth0/00:0a:e4:26:95:59 Nov 7 14:07:28 apple dhclient: Sending on Socket/fallback Nov 7 14:07:28 apple dhclient: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 3 Nov 7 14:07:28 apple ifplugd(eth0)[27270]: client: Listening on LPF/eth0/00:0a:e4:26:95:59 Nov 7 14:07:28 apple ifplugd(eth0)[27270]: client: Sending on LPF/eth0/00:0a:e4:26:95:59 Nov 7 14:07:28 apple ifplugd(eth0)[27270]: client: Sending on Socket/fallback Nov 7 14:07:28 apple ifplugd(eth0)[27270]: client: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 3 Nov 7 14:07:28 apple dhclient: Internet Systems Consortium DHCP Client 4.2.2 Nov 7 14:07:28 apple dhclient: Copyright 2004-2011 Internet Systems Consortium. Nov 7 14:07:28 apple dhclient: All rights reserved. Nov 7 14:07:28 apple dhclient: For info, please visit https://www.isc.org/software/dhcp/ Nov 7 14:07:28 apple dhclient: Nov 7 14:07:28 apple dhclient: Listening on LPF/eth1/00:0c:f1:3e:02:61 Nov 7 14:07:28 apple dhclient: Sending on LPF/eth1/00:0c:f1:3e:02:61 Nov 7 14:07:28 apple dhclient: Sending on Socket/fallback Nov 7 14:07:28 apple avahi-daemon[1906]: Joining mDNS multicast group on interface eth0.IPv6 with address fe80::20a:e4ff:fe26:9559. Nov 7 14:07:28 apple avahi-daemon[1906]: New relevant interface eth0.IPv6 for mDNS. Nov 7 14:07:28 apple avahi-daemon[1906]: Registering new address record for fe80::20a:e4ff:fe26:9559 on eth0.*. Nov 7 14:07:28 apple dhclient: DHCPREQUEST on eth0 to 255.255.255.255 port 67 Nov 7 14:07:28 apple dhclient: DHCPOFFER from 192.168.1.1 Nov 7 14:07:28 apple ifplugd(eth0)[27270]: client: DHCPREQUEST on eth0 to 255.255.255.255 port 67 Nov 7 14:07:28 apple ifplugd(eth0)[27270]: client: DHCPOFFER from 192.168.1.1 Nov 7 14:07:28 apple dhclient: DHCPACK from 192.168.1.1 Nov 7 14:07:28 apple ifplugd(eth0)[27270]: client: DHCPACK from 192.168.1.1 Nov 7 14:07:29 apple dhclient: DHCPRELEASE on eth1 to 192.168.1.1 port 67 Nov 7 14:07:29 apple ifplugd(eth0)[27270]: client: Reloading /etc/samba/smb.conf: smbd only. Nov 7 14:07:29 apple avahi-daemon[1906]: Joining mDNS multicast group on interface eth0.IPv4 with address 192.168.1.146. Nov 7 14:07:29 apple avahi-daemon[1906]: New relevant interface eth0.IPv4 for mDNS. Nov 7 14:07:29 apple avahi-daemon[1906]: Registering new address record for 192.168.1.146 on eth0.IPv4. Nov 7 14:07:30 apple dhclient: bound to 192.168.1.146 -- renewal in 38019 seconds. Nov 7 14:07:30 apple ifplugd(eth0)[27270]: client: bound to 192.168.1.146 -- renewal in 38019 seconds. Nov 7 14:07:30 apple avahi-daemon[1906]: Withdrawing address record for 192.168.1.102 on eth1. Nov 7 14:07:30 apple avahi-daemon[1906]: Leaving mDNS multicast group on interface eth1.IPv4 with address 192.168.1.102. Nov 7 14:07:30 apple avahi-daemon[1906]: Interface eth1.IPv4 no longer relevant for mDNS. Nov 7 14:07:30 apple avahi-daemon[1906]: Interface eth1.IPv6 no longer relevant for mDNS. Nov 7 14:07:30 apple avahi-daemon[1906]: Leaving mDNS multicast group on interface eth1.IPv6 with address fe80::20c:f1ff:fe3e:261. Nov 7 14:07:30 apple avahi-daemon[1906]: Withdrawing address record for fe80::20c:f1ff:fe3e:261 on eth1. Andrew Excerpts from Andrew Pimlott's message of Mon Nov 07 14:04:21 -0800 2011: > Package: ifplugd > Version: 0.28-19 > Severity: normal > > Dear Maintainer, > > I run ifplugd on my eth0 ethernet interface, and use wpa_supplicant for > my eth1 wireless interface. When I am on wireless and plug in my > ethernet cable, I often (but not always) end up with a configured eth0 > interface but no default route. This happens due to a race condition > between eth1 going down and eth0 coming up. I don't think this is > necesarily ifplugd's fault, but I file it here so you can help route it > to the right place. > > Here is what happens: > > 1. ifplugd detects the ethernet interface. > 2. ifplugd runs /etc/ifplugd/action.d/action_wpa. This calls "wpa_cli > -i eth1 disconnect", which takes down the eth1 interface asynchronously. > 3. ifplugd runs /etc/ifplugd/action.d/ifupdown. This calls "ifup eth0", > which brings up the eth0 interface using dhcp (in my configuration). > 4. When dhclient gets a lease, it calls /sbin/dhclient-script, which > calls something like > > ip -4 route add default via 192.168.1.1 dev eth0 > > Unfortunately, at this point, since eth1 was taken down > asynchronously, it may still have the default route. When this > command is run while eth1 has the default route, it fails with > > RTNETLINK answers: File exists > > I can think of three possible solutions: > > - wpasupplicant provides a synchronous call to take down the interface. > - ifplugd polls for the wireless interfaces to finish going down. > - isc-dhcp-client enables setting multiple default routes, so eth0 and > eth1 both have default routes for the brief period where they coexist. > > The last of these seems most logical to me, but from what I understand > it may be difficult to configure. Maybe isc-dhcp-client could take over > the default route unconditionally. > > Anyhow, I would appreciate your advice. > > Andrew > > -- Package-specific info: > /sys/class/net/ interfaces: > /sys/class/net/eth0/ > /sys/class/net/eth1/ > /sys/class/net/lo/ > > -- System Information: > Debian Release: wheezy/sid > APT prefers unstable > APT policy: (500, 'unstable') > Architecture: i386 (i686) > > Kernel: Linux 3.0.0-1-486 > Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) > Shell: /bin/sh linked to /bin/bash > > Versions of packages ifplugd depends on: > ii debconf [debconf-2.0] 1.5.41 > ii libc6 2.13-21 > ii libdaemon0 0.14-2 > ii lsb-base 3.2-28 > > Versions of packages ifplugd recommends: > ii ifupdown 0.7~alpha5+really0.6.16 > > Versions of packages ifplugd suggests: > ii wpasupplicant 0.7.3-5 > > -- debconf information: > * ifplugd/interfaces: eth0 > * ifplugd/hotplug_interfaces: > * ifplugd/args: -f -u0 -d10 -w -I --no-beep > * ifplugd/suspend_action: stop -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
