A Cisco ACI fabric must send a packet between two pods in a Cisco ACI Multi-Pod topology where ARP flooding is disabled within the bridge domain. How does a Cisco ACI spine switch forward ARP messages from a leaf switch in POD1 to POD2?
A.
ARP optimization is applied and sends ARP to remote anycast.
B.
The ARP message is dropped and connectivity is lost between the endpoints.
C.
A proxy ARP message is sent to destination group 225.224.0.0.
D.
An ARP Glean message is sent to multicast address 239.255.255.240.
In a Cisco ACI fabric, ARP Glean messages are sent to a specific multicast group address associated with the bridge domain (BD) when ARP flooding is disabled.
D
"Without ARP flooding allowed in the Bridge Domain, the leaf nodes are not allowed to flood the frame along the local multi-destination tree, so in order to ensure the ARP request can be delivered to a remote endpoint for allowing its discovery, a process named “ARP Gleaning” has been implemented."
https://www.cisco.com/c/en/us/solutions/collateral/data-center-virtualization/application-centric-infrastructure/white-paper-c11-737855.html#:~:text=Without%20ARP%20flooding%20allowed%20in%20the%20Bridge%20Domain%2C%20the%20leaf%20nodes%20are%20not%20allowed%20to%20flood%20the%20frame%20along%20the%20local%20multi%2Ddestination%20tree%2C%20so%20in%20order%20to%20ensure%20the%20ARP%20request%20can%20be%20delivered%20to%20a%20remote%20endpoint%20for%20allowing%20its%20discovery%2C%20a%20process%20named%20%E2%80%9CARP%20Gleaning%E2%80%9D%20has%20been%20implemented.
upvoted 3 times
...
Log in to ExamTopics
Sign in:
Community vote distribution
A (35%)
C (25%)
B (20%)
Other
Most Voted
A voting comment increases the vote count for the chosen answer by one.
Upvoting a comment with a selected answer will also increase the vote count towards that answer by one.
So if you see a comment that you already agree with, you can upvote it instead of posting a new comment.
prospio971
2 days, 18 hours agoed27
9 months, 3 weeks agomms101
9 months, 4 weeks ago