getting many triggers for adding new hosts

[robertchen]

I am adding some new network routers/switches but I get many triggers for them:

Interface ge-1/0/16 is down for 5 minutes

it is from:

({Template_SNMP_IF:ifOperStatus[{#SNMPVALUE}].min(300)}=2 & {Template_SNMP_IF:ifAdminStatus[{#SNMPVALUE}].last()}=1) | ({TRIGGER.VALUE}=1 & {Template_SNMP_IF:ifOperStatus[{#SNMPVALUE}].max(1800)}>1 & {Template_SNMP_IF:ifAdminStatus[{#SNMPVALUE}].last()}=1)

I think for newly added, zabbix thinks it was down for last 5 minutes, I only want triggers for interface change from up to down, what is wrong here and how can I change ?

thanks.