Problem with link-local addresses on USB interfaces

[Bernd Walter]

On Sat, Aug 28, 2010 at 03:25:08PM -0700, Doug Barton wrote:
> 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.

Ah - Ok - quite unexpected after ~10 years IPv6 on FreeBSD.
But now everything looks fine.

> 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.

Thank you for the quick response.

-- 
B.Walter <bernd at bwct.de> http://www.bwct.de
Modbus/TCP Ethernet I/O Baugruppen, ARM basierte FreeBSD Rechner uvm.