On which two interface types should a user configure storm control to protect against broadcast traffic? (Choose two.)
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A. B. C. D. E.BD.
https://www.cisco.com/c/en/us/td/docs/switches/datacenter/aci/apic/sw/2-x/L2_config/b_Cisco_APIC_Layer_2_Configuration_Guide/The correct answers are B. port channel on a single leaf switch and E. fabric uplink interfaces on the leaf switches.
Storm control is a feature that helps to protect the network from broadcast, multicast, or unicast flooding by monitoring and limiting the traffic rate on a per-port basis. Storm control can be configured on switch ports, and it can be used to protect against broadcast storms that can consume excessive bandwidth and cause network performance issues.
In the Cisco Application Centric Infrastructure (ACI) fabric, there are different types of interfaces that can be used to connect endpoints and switches. The following is a brief explanation of each interface type and whether it is a suitable candidate for storm control configuration:
A. APIC facing interfaces: These are the interfaces used to connect the switches to the Application Policy Infrastructure Controller (APIC), the central management and configuration point for the ACI fabric. Storm control is not needed on these interfaces since they are not used to forward data traffic.
B. Port channel on a single leaf switch: This interface type is a bundle of multiple physical links that are aggregated to increase bandwidth and provide redundancy. Since port channels can carry a high volume of traffic, they are a common target for broadcast storms. Therefore, configuring storm control on port channels can help to protect against such storms.
C. All interfaces on the leaf switches in the fabric: This option is not recommended since it can cause unnecessary traffic drops and impact the network performance. Storm control should be configured only on the interfaces where it is necessary.
D. Endpoint-facing trunk interface: These interfaces are used to connect endpoint devices, such as servers or virtual machines, to the fabric. Configuring storm control on these interfaces can limit the traffic rate and cause connectivity issues with the endpoints.
E. Fabric uplink interfaces on the leaf switches: These interfaces are used to connect the leaf switches to the spine switches, and they carry a large volume of traffic between the switches. Configuring storm control on these interfaces can help to prevent broadcast storms from affecting the entire fabric.
In summary, configuring storm control on port channels and fabric uplink interfaces is a best practice in the ACI fabric to protect against broadcast storms and ensure optimal network performance.