[PLUG] Controling Network Interfaces

[Rich Shepard]

   Still don't have the Sony Vaio working with wireless hot spots, but know
why and would like your ideas on how to remedy the problem.

   When I invoke wicd on my Dell Latitude and it connects to the WAP eth0 is
brought down ('ifconfig eth0 down' in Slackware) so the only network
interface in the kernel routing table is wlan0.

   When I invoke wicd on the Sony Vaio and it connects to the WAP eth0
remains UP. It's not RUNNING, but it shows a gateway in the kernel routing
table that is preferred to the gateway on the wlan0 interface.

   The Sony Vaio has ifplugd installed. This brings up and takes down eth0
when the ethernet cable is inserted and removed, but it does not prevent
eth0 from appearing in the routing table when wlan0 is RUNNING.

   The results of lspci -v for the wireless network controllers on both
systems are below.

Dell Latitude (built June 2010; 2.6.37.6 kernel):

02:00.0 Network controller: Intel Corporation Centrino Advanced-N 6200 (rev
35)
 	Subsystem: Intel Corporation Centrino Advanced-N 6200 2x2 AGN
 	Flags: bus master, fast devsel, latency 0, IRQ 44
 	Memory at f5500000 (64-bit, non-prefetchable) [size=8K]
 	Capabilities: [c8] Power Management version 3
 	Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
 	Capabilities: [e0] Express Endpoint, MSI 00
 	Capabilities: [100] Advanced Error Reporting
 	Capabilities: [140] Device Serial Number 00-23-14-ff-ff-68-98-e0
 	Kernel driver in use: iwlagn
 	Kernel modules: iwlagn

Sony Vaio (built November 2011; 3.2.7 kernel):

02:00.0 Network controller: Intel Corporation Centrino Wireless-N 1000
 	Subsystem: Intel Corporation Centrino Wireless-N 1000 BGN
 	Flags: bus master, fast devsel, latency 0, IRQ 42
 	Memory at d2500000 (64-bit, non-prefetchable) [size=8K]
 	Capabilities: [c8] Power Management version 3
 	Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
 	Capabilities: [e0] Express Endpoint, MSI 00
 	Capabilities: [100] Advanced Error Reporting
 	Capabilities: [140] Device Serial Number 74-e5-0b-ff-ff-63-20-16
 	Kernel driver in use: iwlwifi
 	Kernel modules: iwlwifi

   Given this (and any other information you'd like me to provide), what
might prevent removal of eth0 from the routing table when wlan0 is connected
to a WAP?

Rich