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When the client endpoint and the service node interface are in different subnets, the Adjacency Type value should be set to Routed. This setting is used to indicate that routing is required between the client endpoint and the service node interface, as they are not in the same Layer 2 broadcast domain and need Layer 3 routing to communicate.

To securely export Cisco APIC configuration snapshots to a secure, offsite location using an encrypted tunnel and a platform-agnostic data format that provides namespace support, the following configuration set must be used:

Choose a Platform-Agnostic Data Format: Export the configuration in a data format like JSON or XML, which are platform-agnostic and support namespaces1.

Use an Encrypted Tunnel: Transfer the configuration snapshot over a secure protocol such as SFTP or SCP, which provides an encrypted tunnel for the data transfer1.

Schedule the Export: Set up a scheduled export of the configuration in the Cisco APIC to occur at regular intervals, ensuring the process is automated1.

Enable Encryption: Make sure the configuration export policy includes encryption settings. Cisco APIC supports AES-256 encryption for securing exported configuration files2.

Verify Namespace Support: Ensure that the chosen data format and the method of export support the use of namespaces, which are essential for organizing elements and attributes in XML documents1.

By following these steps and choosing Option B, the engineer can meet the requirements for securely exporting Cisco APIC configuration snapshots to an offsite location.

To resolve the issue of STP convergence causing a microloop and significant CPU spike on all switches after connecting legacy non-ACI switches to the Cisco ACI fabric, BPDU filtering should be configured on the interfaces of the external switches that face the Cisco ACI fabric. BPDU filtering prevents Bridge Protocol Data Units (BPDUs) from being sent or received on those interfaces, which stops the STP process and eliminates the possibility of microloops.

The group of settings required to meet the requirements for workload migration where servers will physically terminate at the Cisco ACI, but their gateway must stay in the existing network, is:

L2 Unknown Unicast: Flood

L3 Unknown Multicast Flooding: Flood

Multi Destination Flooding: Flood in BD

ARP Flooding: Enable5

These settings ensure that the bridge domain is configured to handle unknown unicast and multicast traffic appropriately, and ARP flooding is enabled to allow for the resolution of IP addresses when the gateway is outside the fabric5.

https://www.cisco.com/c/en/us/td/docs/switches/datac enter/aci/apic/sw/migration_guides/migrating_existing_networks_to_aci.html

To support the addition of new ESXi hosts to the existing VMM domain, the action that should be taken is to map the leaf interface selector to the AEP that is associated with the VMM domain (Option D). This ensures that the correct policies are applied to the interfaces where the new ESXi hosts are connected.

The feature that dynamically assigns or modifies the EPG association of virtual machines based on their attributes is uSeg EPGs. uSeg EPGs allow for microsegmentation within the Cisco ACI environment, enabling the dynamic assignment of VMs to EPGs based on attributes such as VM name, tag, or other identifiers

To set up a Cisco ACI fabric to send Syslog messages related to hardware events to a dedicated Syslog server, the policy should be configured at uni/fabric/monfab-default4. This location in the Cisco APIC allows for the configuration of Syslog policies that can be applied to the entire fabric4.

https://www.cisco.com/c/en/us/td/docs/switches/datacenter/aci/apic/sw/4-x/aci -fundamentals/Cisco-ACI-Fundamentals-401/Cisco-ACI-Fundamentals-401_chapter_01100.html