Public bug reported:

Binary package hint: ifupdown

Versions:
Kubuntu 9.10,
ifupdown 0.6.8ubuntu21

I'm trying to use bonding to provide seamless failover between the wired
and wireless interfaces. Wired>eth0 wireless>wlan1. Since network
manager doesn't support bonding yet, I stop it (# stop network-manager)
and (try to) manage the interfaces using ifup and ifdown utilities.
Using the example in
/usr/share/doc/ifenslave-2.6/examples/ethernet+wifi, I set up my
interfaces file:

auto lo
iface lo inet loopback

auto bond0
iface bond0 inet dhcp
        bond-slaves eth0 wlan1
        bond-mode 1
        bond-miimon 100
        bond-primary eth0
iface wlan1 inet manual
        bond-give-a-chance 10
        wpa-bridge bond0
        wpa-ssid ASUS
        wpa-psk ****
        wpa-key-mgmt WPA-PSK
        wpa-group CCMP TKIP

My problem is that with this setup, running ifup -v bond0 shows that
wpa_supplicant is never run, thus leaving the wireless interface down.
Is there something I'm missing? Using the interfaces file to connect
directly (no bonding interface) with wlan1 works fine.

** Affects: ifupdown (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: bonding ifupdown networking wifi

-- 
WiFi/ethernet bonding config fails to launch wpa_supplicant
https://bugs.launchpad.net/bugs/515315
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