Thanks to Quinn Wood who mailed me the following link:
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/network-aggregation.html
Obviously i missed the advanced chapter.
After aggregating two links i cant access SNMP over the aggregated
link anymore. My FreeBSD machine collects some statistics of a direct
connected router via SNMP. After changing this link to connect with
lagg0 snmpwalk gives me a timeout.
Is this a bug?
Best regards,
Stefan