Home » Cisco » 350-080 » Which statements are true regarding the Cisco UCS fabric failover feature?
Which statements are true regarding the Cisco UCS fabric failover feature? (Choose three.)
A. FabricSync is used to synchronize MAC addresses to an adjacent fabric interconnect after a server interface failover.
B. Gratuitous ARPs are sent on fabric interconnect uplinks after a server interface failover.
C. Fabric failover can be used on vNICs and vHBAs.
D. Fabric failover is configured as part of the service profile.
E. Fabric interconnects in end-host mode use fabric failover instead of spanning tree to provide redundancy on uplink ports.
Correct Answer: ABD
Explanation/Reference:
Explanation:
When Fabric Failover is enabled, the implicit MAC address of the adapter is synchronized with the second fabric switch in preparation for a failure. This capability has been present since UCS Manager version 1.0. Below is an example of a Windows or Linux OS loaded on the bare metal server with Fabric Failover enabled. The OS has a simple redundant connection to the network with a single adapter and no requirement for a NIC Teaming configuration.
After the dynamic re-pinning process, the Fabric Interconnect will send Gratuitous ARP messages for all of the MAC address that were previously using the failed uplink. This GARP process aids the upstream network in quickly learning the new location of the affected MAC address now using the new uplink.
Reference: http://www.cisco.com/c/en/us/td/docs/unified_computing/ucs/release/notes/OL_24086.pdf
