Is Portfast & BPDUGuard still needed on access ports when Flex Link is enable?
STP is disable when FlexLink is enable but i believe both can be active on the same switch but Flex Links do not participate in STP in all VLANs in which STP is configured. If the switch is running STP, Flex Links is not necessary because STP already provides Link-level redundancy or backup. With STP not running, there are no loops in the configured topology. So my conclusion is to better have either one of the other active not both on the same switch and if Flex link is enable, no need for Portfast or BGPDUGard, Loopguard or any STP machanisms active since STP is no longer active on the switch.