Single Arm Installation of LTM

sorry to confuse you. i mean per bigip unit i would use 4 ports for cisco (2 each), 2 ports for network failover and 2 ports for future use. since network failover heartbeat is really important, if it is missing, both bigip units would end up with active/active. so i think using 2 ports as a trunk might be better if port is available. anyway, it is just my personal opinion. it is not right or wrong. you may use only 1 dedicated port for network failover as primary and use internal vlan as secondary.