VLAN Interfaces does not response

[sppienz.de]

Hy,

we have problems with our VLAN configuration on PFSENSE. The Vlans are accessible for some hours mostly 5 - 6 and after this time they did not RESPONSE until we do a DHCP Address renew with the web gui. Wa are using Intel Nic's( Intel 82574L  and 825741 Chip.

The only Genaral error we have is

php: servicewatchdog_cron.php: The command '/usr/local/sbin/unbound -c /var/unbound/unbound.conf' returned exit code '1', the output was '[1427471882] unbound[65378:0] error: bind: address already in use [1427471882] unbound[65378:0] fatal error: could not open ports'

and this

 	apinger: Could not bind socket on address(192.168.180.22) for monitoring address x.x.x.x (WAN2_DHCP) with error Can't assign requested address

Does anybody have a idea why this might be ?

Thanks