Exam 300-620 topic 1 question 144 discussion

Table 17: Down action - Bypass, Behavior - Traffic is redirected to next PBR node in the service graph, Use case - Skip over optional service node in Multi nodes service graph. https://www.cisco.com/c/en/us/solutions/collateral/data-center-virtualization/application-centric-infrastructure/white-paper-c11-739971.html#Optionalfeatures

Bypass: Traffic is redirected to next PBR node in the service graph. permit action: Traffic is sent directly to the destination, and the rest of the service chain is skipped.

Answer is A, as bypass action is necessary to skip the nodes with lower threshold or the ones that are not up / unavailable.

Option C is correct: • PBR node tracking: This allows PBR to track the status of the Layer 4 to Layer 7 devices in the service graph. • Tracking threshold with action permit: This sets the threshold for device availability and permits traffic redirection to the available devices. • Symmetric PBR: This ensures that both inbound and outbound traffic is redirected through the same set of Layer 4 to Layer 7 devices in the service graph. • Resilient hashing: This load-balancing algorithm ensures that traffic is distributed evenly across all available devices, preventing any one device from becoming overloaded.

I think A, there is action bypass https://www.cisco.com/c/en/us/td/docs/dcn/aci/apic/5x/layer-4-to-layer-7-services-configuration/cisco-apic-layer-4-to-layer-7-services-deployment-guide-52x/configuring-policy-based-redirect-52x.html#id_109876

I thin C Ref.https://www.cisco.com/c/en/us/solutions/collateral/data-center-virtualization/application-centric-infrastructure/white-paper-c11-739971.html