> > i don't know how it can happen.
> > can you provide "ifconfig -a" from console?
> 
> yup, see attached file.

can you include "ifconfig hme0"?

> > are hme0 and hme1 connected to different switches?
> 
> hum... yes for the moment.
> the Ultra5 is bound to become my gateway, so hme0 will be connected to
> my ADSL router and hme1/2/3/4 will be connected to a 3Com switch.
> but since I haven't finished configuring the whole thing, hme0/1/2 are
> connected to the same 3Com switch.

can you disconnect hme1 from the switch and
see if "ifconfig agr0 agrport hme1" still freezes connections over hme0?

YAMAMOTO Takashi