Problem with link-local addresses on USB interfaces

[Doug Barton]

On 8/28/2010 3:08 PM, Bernd Walter wrote:
> Only the PCI and loopback interface responds to their own link local
> address.
>
> I'm also puzzled about what I need to configure on an interface
> to get an link-local address.
> I've finally put ifconfig_ue0/1="UP" into rc.conf.

You haven't said what version of FreeBSD you're using, but I'm assuming 
-current. The security officer asked to have the default changed so that 
link-local addresses are not accessible by default. I implemented a 
version of this such that the interface comes up with "ifdisabled" by 
default, which prevents all IPv6 traffic, but does not prevent you from 
configuring the interface.

You can read in the ifconfig man page how to clear that flag, which will 
allow traffic to flow. There are also examples in /etc/defaults/rc.conf 
that demonstrate how to set up an ifconfig line to do nothing but 
establish a link-local if that's how you want the interface to be 
configured.


hth,

Doug