300-620 · Question #292
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
The correct answer is D. An ARP Glean message is sent to multicast address 239.255.255.240.. 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
Question
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?
Options
- AARP optimization is applied and sends ARP to remote anycast.
- BThe ARP message is dropped and connectivity is lost between the endpoints.
- CA proxy ARP message is sent to destination group 225.224.0.0.
- DAn ARP Glean message is sent to multicast address 239.255.255.240.
How the community answered
(67 responses)- A3% (2)
- B13% (9)
- C6% (4)
- D78% (52)
Explanation
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.
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