It doesn't appear that the 1810 supports sending alerts to an SNMPtrap daemon on UDP 162, so using SNMP to receive alerts when a port becomes disabled may not be possible via SNMP.
It appears your only solution, as mentioned above, will be the use the rsyslog to a machine on UDP 514. Most unix machines can be configured to accept this kind of log forwarding, almost trivially, but watch for host firewalls also on your host if you go that route.
I just came to clearly address the SNMP traps portion of the question, though.