Home » Cisco » 300-175 » Which two statements describe effects of enabling a Cisco UCS Fabric Interconnect in Ethernet end-host mode?
Which two statements describe effects of enabling a Cisco UCS Fabric Interconnect in Ethernet end-host mode? (Choose two.)
A. MAC address learning is disabled on the uplink ports of the fabric interconnect.
B. MAC address learning is enabled on the server ports of the fabric interconnect.
C. Server-to-server communication on the same VLAN is not performed locally Vie fabric interconnect, but requires an external switch.
D. By default. unicast traffic received by the fabric uplink port to unknown destination MAC addresses is forwarded to all of the server ports.
E. MAC address learning is disabled on all of the ports in Ethernet end-host mode.
Correct Answer: AB
Explanation/Reference:
https://www.cisco.com/c/en/us/solutions/collateral/data-center-virtualization/unifiedcomputing/whitepaper_c11-701962.html
MAC address learning occurs only on the server ports; MAC address movement is fully supported.
Server-to-server Layer 2 traffic is locally switched.
In end-host mode, unknown unicast broadcasts are not flooded, switch mode is required. Additionally, because there is no MAC address learning on the uplink ports, the MAC address table can scale to support as many virtual machines as the number of entries available in the MAC address forwarding table.
