300-620 Exam Dumps - Cisco CCNP Data Center Questions and Answers

To ensure that servers supporting only Cisco Discovery Protocol are discovered automatically by the Cisco ACI fabric when connected, the action that must be taken is to Create an override policy that enables Cisco Discovery Protocol after LLDP is enabled in the default policy group

In a Cisco ACI bridge domain and VRF configured with a default data-plane learning configuration, the two endpoint attributes that are programmed in the leaf switch when receiving traffic are:

Local MAC, IP (Option D)5.

Local Subnet (Option E)5. These attributes are learned by the ACI fabric through common network methods such as ARP, GARP, and ND, as well as through the data-plane. The local MAC and IP addresses are learned and used for traffic routing and bridging, while the local subnet information is used for traffic optimization and endpoint location tracking56.

The scenario involves a Cisco ACI fabric with 10 standalone leaf switches, and the engineer must configure only the first two leaf switches (e.g., Leaf-1 and Leaf-2) in a Virtual Port Channel (vPC) configuration. The goal is to select the appropriate vPC protection type to achieve this specific pairing while leaving the other eight leaf switches standalone.

Requirement Analysis

In Cisco ACI, vPC is used to provide active-active link redundancy and load balancing between two leaf switches connected to the same set of endpoints (e.g., servers or external devices).

The fabric contains 10 standalone leaf switches, meaning no pre-existing vPC pairs are configured, and the task is to form a vPC specifically between the first two leaf switches.

The vPC protection type determines how the pair is defined and protected within the ACI fabric, ensuring the configuration is limited to the intended switches.

Option Evaluation

A. serial:

The "serial" protection type is not a valid vPC protection option in Cisco ACI. This term might be confused with serial link configurations or other networking contexts, but it does not apply to vPC in ACI.

When configuring Cisco ACI VMM domain integration with VMware vCenter, the object that is created in vCenter is a VMware vSphere Distributed Switch (VDS)12. The VDS is a virtual switch that extends across all esxi hosts in the cluster and provides a centralized interface from which network configurations can be managed12. This switch allows network administrators to manage networking for multiple hosts and virtual machines from a single interface within vCenter12.

To configure a bridge domain for an EPC called “Web Servers” that meets the specified requirements, the following steps should be taken:

Set L2 Unknown Unicast to Hardware Proxy: This setting ensures that only traffic to known MAC addresses is allowed, which helps to reduce noise by preventing unknown unicast flooding within the bridge domain1.

Configure L3 Unknown Multicast Flooding to Optimized Flood: This setting limits multicast traffic to the ports that are participating in multicast routing, which optimizes the delivery of multicast packets1.

Create an Endpoint Retention Policy with a Local Endpoint Aging interval of 1200 seconds (20 minutes): This policy ensures that endpoints within the bridge domain are kept in the endpoint table for 20 minutes without any updates, maintaining the stability of the network1.

By following these steps, the bridge domain will be configured to satisfy the requirements for the EPC called “Web Servers” in the Cisco APIC environment.

The two essential components of a Cisco ACI Virtual Machine Manager (VMM) domain policy configuration are:

VMM domain profile1.

EPG association1.

https://www.cisco.com/c/en/us/td/docs/switches/datac enter/aci/apic/sw/1-x/aci-fundamentals/b_ACI-Fundamentals/b_ACI-Fundamentals_chapter_01011.html#concept_74EFC437C0AA44A391676F70ACE59DF3

The engineer configures port 1/2 on Leaf-101 and Leaf-102 to connect to a new server (SVR-12), which belongs to EPG-12 using VLAN-1212 encapsulation. The server is configured as a vPC member port and statically bound to EPG-12. The task is to ensure connectivity, indicating a missing configuration step.

Requirement Analysis

Static binding of a vPC member port to an EPG requires proper VLAN association and domain mapping.

vPC ensures redundancy, and the VLAN (1212) must be allocated and associated with the EPG via a domain (e.g., VMM or physical domain).

Option Evaluation

A. Create a VPC Explicit Protection Group for EPG-12 and VLAN-1212:

vPC Explicit Protection Groups are used for specific vPC configurations, but this is not a standard requirement for EPG binding and VLAN association.

To create a backup of the Cisco ACI fabric for disaster recovery that is secure, encrypted, and in a format conducive to processing with a Python script, the engineer must select Secure Copy Protocol (SCP) for secure and encrypted transport. The backup file should be in JSON format, which is similar to a Python dictionary and can be easily processed by a Python script. Additionally, enabling Global AES Encryption ensures that all user and password-related information is included securely in the backup1.

 In the process of discovering a new Cisco ACI fabric, after the discovery of leaf 1 has been completed, the next nodes expected to be discovered are the spine switches. This is because the spines are typically connected to the leaf switches and play a central role in the fabric’s topology6.

 In Cisco ACI, the object classes are used to categorize different types of managed objects within the ACI model. The output presented is indicative of a Tenant class object. Tenants in ACI are a top-level container for application policies, essentially providing a unit of isolation from other tenants. Each tenant can contain its own application policies, services, and network policies, and they are separate from other tenants to ensure multi-tenancy1.

References :=

Cisco ACI Policy Model Guide1

Object Renaming in Cisco ACI - Cisco2

Application Centric Infrastructure (ACI) REST API Guide - Cisco DevNet

https://www.cisco.com/c/en/us/td/docs/switches/datacenter/aci /apic/sw/4-x/openstack/ACI-Installation-Guide-for-Red-Hat-Using-OSP13-Director/m-configuring-ironic-for-openstack.html