Your best bet for getting to root cause would be to open a TAC Case and provide the engineer with a showtech from both the active and the standby. Without that data is would be impossible to tell what caused the ACTIVE/ACTIVE scenario.
Having said that, there is a feature that will prevent an active active scenario when the FT link traffic is interupted. This feature is call a query interface:
This is configured under the ft peer and provides an alternate interface to try to reach the ft peer should the FT vlan goes down. If the ACE can reach its peer over the query vlan, it will not be come active.
Why do you need native HA: The native HA feature allows two Cisco DCNM
appliances to run as active and standby applications, with their
embedded databases synchronized in real time. Therefore, when the active
DCNM is not functioning, the standby DCNM will...
This document will provide screenshots to outline the steps to setup
TACACS+ configuration to ACI and also the configuration required on
Cisco ACS server. Please find the official Cisco guide for configuring
TACACS+ Authentication to ACI:
Is it supported or NOT supported? It's a frequently asked question.
Before APIC, release 2.3(1f), transit routing was not supported within a
single L3Out profile. In APIC, release 2.3(1f) and later, you can
configure transit routing with a single L3Out pr...