Home » Cisco » 350-080 » Which statements are true?
Refer to the exhibit.
Fabric Interconnect A, operating in end-host mode, receives an ingress frame with source MAC address 0025.b500.0035 on uplink Eth1/19.
Which statements are true? (Choose two.)
A. The frame will be accepted. Fabric Interconnect A will update its MAC address table to show that 0025.b500.0035 is dynamically learned on Eth1/19 and no longer dynamically learned on Eth5/1/6.
B. Fabric Interconnect A will transmit a Gratuitous ARP for 0025.b500.0035 since it has moved ports, and the upstream network needs to be notified of the new location.
C. Fabric Interconnect A will drop the frame.
D. The MAC address table will not be updated as a result of receiving this frame on an uplink.
E. Reverse Path Forwarding will determine whether or not this frame is dropped by Fabric Interconnect A.
F. Deja vu will determine whether or not this frame is dropped by Fabric Interconnect A.
Correct Answer: CD
Explanation/Reference:
Explanation:
Another difference in end-host mode is that MAC address learning occurs only on server ports, not on uplink ports. The fabric interconnect learns and stores only MAC addresses that are located within the system, such as the addresses of the physical servers in the blade chassis and any virtual servers the physical servers may be hosting. When the fabric interconnect receives a frame from a server destined for a MAC address that cannot be found in its local MAC address table, it assumes that the destination must be outside the system and will send the frame to the server’s pinned uplink.
End-host mode has a scalability advantage as well. In end-host mode, the fabric interconnect’s MAC address table will grow proportionally to the size of the Cisco Unified Computing System, not to the size of the entire data center, enabling better long-term scalability.
Reference: http://www.cisco.com/c/en/us/products/collateral/switches/nexus-7000-series-switches/white_paper_c11-623265.html
