Hi ,
we are using viprion 2400, i am unable to see interface transition state change SNMP trap in SNMP manager. i am able to see the below log in /var/log/ltm.
Oct 28 04:59:47 slot1/lb2 inf...
It should send them. There was a bug sol14517: The BIG-IP system may not generate link status SNMP traps for interface transitions, which should be fixed in 11.5.3 according SOL.