You can use the same mac address on different CIP cards (or even ports) for fault tolerance and load balancing. Both CIPs will receive and respond to explorer traffic and the session will be established with the first to respond.
This will work in a token ring environment which supports duplicate mac addresses and multiple paths because of the presense of the RIF fields, however this is not supported in transparant bridging environments like ethernet where the end devices cannot handle seeing multiple responses to the explorer.
Cisco brought out the DLSW Ethernet Redundancy feature to get around this problem so, depending on your topology, you may be able to use it. See the following URL for more information -
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...