freebsd stable - Jun 2012 - FreeBSD 8.3-STABLE #0 r237184 if_tun auto-up upon create.

Hoping someone here might be able to clue me in on what I am seeing.

FreeBSD 8.3-STABLE #0 r237184

When creating a if_tun(4) device...
ifconfig tun0 create 

With these line in rc.conf(5)
cloned_interfaces="tun0"
ifconfig_tun0="metric 100 down"

And sysctl net.link.tun.devfs_cloning=0

The resulting tun0 device results in state...
tun0: flags=8011<UP,POINTOPOINT,MULTICAST> metric 100 mtu 1500


After removing the ifconfig_tun0= and running ifconfig create...
tun0: flags=8010<POINTOPOINT,MULTICAST> metric 0 mtu 1500


Why would the device enter a UP/DOWN state if there is no addressing
information being fed to it ? and especially with a directive of
"down"
?


As a workaround I just removed the ifconfig_tun0= and dropped a ifconfig
command in rc.local to achieve what I want for the moment. I need this
interface created but not in any state unless otherwise manually
specified.


Thanks

-- 

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18.06.2012 09:47, Jason Hellenthal ?????:
> 
> Hoping someone here might be able to clue me in on what I am seeing.
> 
> FreeBSD 8.3-STABLE #0 r237184
> 
> When creating a if_tun(4) device...
> ifconfig tun0 create 
> 
> With these line in rc.conf(5)
> cloned_interfaces="tun0"
> ifconfig_tun0="metric 100 down"
> 
> And sysctl net.link.tun.devfs_cloning=0
> 
> The resulting tun0 device results in state...
> tun0: flags=8011<UP,POINTOPOINT,MULTICAST> metric 100 mtu 1500
> 
> 
> After removing the ifconfig_tun0= and running ifconfig create...
> tun0: flags=8010<POINTOPOINT,MULTICAST> metric 0 mtu 1500
> 
> 
> Why would the device enter a UP/DOWN state if there is no addressing
> information being fed to it ? and especially with a directive of
"down"
> ?
That's because the word "up" is automatically added by system
rc-scripts
for ifconfig_XXX lines, so real ifconfig statement in your case is:

ifconfig tun0 metric 100 down up

Eugene Grosbein