300-635 Automating Cisco Data Center Solutions (DCAUTO) Questions and Answers

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Consistency of Systems Configuration : Network configuration tools like Ansible and Puppet ensure that configurations across multiple devices in a data center are uniform.  This consistency reduces the risk of errors that can occur when configurations are applied manually, leading to a more stable and reliable network infrastructure 1 2 .

Automation of Repetitive Tasks : These tools automate routine tasks such as deploying updates, applying configurations, and provisioning systems.  By automating these tasks, data center operations become more efficient, reducing the time and effort required for manual configuration and increasing productivity

The Cobra SDK is used for automating tasks within Cisco’s Application Policy Infrastructure Controller (APIC). To create a new tenant named ‘Cisco’, the correct code is  Tenant = Tenant(topMo, name= ' Cisco ' ) . This line of code initializes a new instance of the Tenant class, with  topMo  as the parent managed object and ‘Cisco’ as the name of the tenant. This effectively instructs the APIC to create a new tenant with the given name.

References :

Implementing Automation for Cisco Data Center Solutions (DCAUI) course:  Cisco Training Course

Cisco Learning Network - Data Center Training Videos:  Cisco Learning Network

 The Cisco UCS Director script module serves as a centralized repository within the UCS Director platform. It allows users to store custom scripts, Java archives (jars), and customized lists of values, which are crucial for creating or modifying workflows to automate tasks in a data center environment. By utilizing the script module, administrators can enhance workflow functionality with their own scripts or existing ones, thereby streamlining operations.

References :

Cisco UCS Director Scripting Guide

Cisco Learning Network’s Data Center Training Videos

The command  telemetry_receiver.py --ip-address < addr > -port < port >  is used to start a Python network telemetry collector. This command specifies the IP address and port where the telemetry receiver will listen for incoming telemetry data from network devices

The subscription stream for sys/bgp is set to be sent every 5000 milliseconds, as indicated by the configuration line  switch(config-tm-sub)# snsr-grp 100 sample-interval 5000 . Since there are 1000 milliseconds in a second, a sample interval of 5000 milliseconds equates to a frequency of every 5 seconds.  References :  Cisco Nexus 9000 Series NX-OS System Management Configuration Guide

 The configuration snippet from a network device indicates that telemetry settings are being configured for Ethernet port 1/1. The data is collected and streamed to four different destinations, each with a unique port number. The  sample-interval  is set to ‘100000’, which is typically in microseconds. Therefore, the data is streamed every 100 milliseconds, as 100,000 microseconds equals 100 milliseconds.

References :

Implementing Automation for Cisco Data Center Solutions (DCAUI) course page.

Cisco Data Center Training Videos.

To add an additional NTP server to an existing NTP server policy in Cisco Intersight via API call, one would typically use the HTTP PATCH method to update the policy with the new server details. The PATCH method is used to apply partial modifications to a resource.

The image shows four different code snippets that are examples of API calls using different HTTP methods (POST and PATCH) for modifying NTP server policies in Cisco Intersight. However, without seeing the full context of options A, B, C, and D from the original question source, it’s impossible to determine which one correctly adds an additional NTP server to “My_NTP_Policy”.

Based on common practices for RESTful APIs and assuming that “My_NTP_Policy” already exists and we need to add another NTP server to it without removing existing ones:

One would use a PATCH request.

The URI (Uniform Resource Identifier) should target the specific policy by name or ID.

The body of the request should include only the properties that are being added or changed—in this case, adding a new NTP server address.

References  :=

Implementing Automation for Cisco Data Center Solutions (DCAUI) -  Cisco Training Course

 The  ucs_vlans  module is part of the Ansible collection for Cisco UCS (Unified Computing System) and is used to manage VLANs on Cisco UCS Manager. When working with Cisco UCS, VLANs are a crucial aspect of network segmentation and management. The  ucs_vlans  module allows users to configure VLAN settings such as the VLAN ID, name, and state. It also supports advanced features like fabric configuration and multicast policies.

References :

Ansible Documentation for Cisco UCS modules 1 .

Cisco’s official training and certifications page, which may offer updated and detailed courses on implementing automation for Cisco Data Center solutions

The code snippet is intended to access a child managed object within Cisco’s ACI. The current placement of line 2 ( dnQuery.subtree = ' parent ' ) specifies that the query should look at the parent objects, not the children. To fix the code so that it accesses a child managed object, line 2 should be moved to after line 3, where  tenantMo  is defined. This change will ensure that the subtree of  tenantMo  is set to ‘parent’, which means that when  defaultBDmo  is called in line 4, it will correctly reference a child managed object under  tenantMo .  References  :=

Cisco ACI documentation on Managed Objects

Cisco DevNet ACI Programmability Guide

Kubernetes deployed with the ACI CNI plug-in offers Namespace Isolation and Cluster Isolation. Namespace Isolation segregates resources within the same cluster using Kubernetes namespaces, while Cluster Isolation ensures complete separation between different clusters.  References :

Cisco ACI Documentation

Cisco Learning Network

To access the REST API browser within Cisco UCS Director, one must enable the Developer menu from the Cisco UCS Director interface. After enabling this option, select ‘Orchestration’ and then choose ‘REST API Browser’. This allows users to interact with the various APIs provided by Cisco UCS Director for automation and orchestration purposes.  References :  Cisco UCS Director REST API Guide

Reference : https://www.cisco.com/c/en/us/td/docs/unified_computing/ucs/ucs-director/rest-api-cookbook/6-6/cisco-ucs-director-REST-API-cookbook-66/cisco-ucs-director-REST-API-cookbook-66_chapter_010.html

  In order to integrate a Kubernetes environment with Cisco ACI, the Kubernetes manifests typically need to include references to ACI End Point Groups (EPGs). This allows for the application components within Kubernetes to be associated with the networking policies defined in ACI, ensuring consistent network policy application across both environments.  References : Since I can’t provide direct links to external sources, I recommend checking Cisco’s official documentation and training materials for the most accurate and up-to-date information.

The Python code  Vrf(fvTenant(uniMo, ' CustA ' ), ' CustA_VRF)  creates a VRF in an ACI tenant using the Cobra SDK. The  Vrf  class is instantiated with a parent  fvTenant  object and the name of the VRF.

REST, or Representational State Transfer, is an architectural style that is characterized by its stateless nature, meaning each request from a client to a server must contain all the information needed to understand and complete the request without relying on any stored context on the server. This increases reliability and scalability. However, ‘stateful’ is not a guiding principle of REST; instead, it is ‘statelessness’ that is a core principle.  The other main guiding principles include a uniform interface, cacheability, and a layered system

Cisco NX-OS iPXE supports both IPv4 and IPv6 network protocols.  iPXE is an open-source network boot firmware that enhances the capabilities of the standard PXE by supporting additional protocols like HTTP and TFTP, which can operate over both IPv4 and IPv6 networks 3 .

References  :=

Cisco Nexus 9000 Series NX-OS Programmability Guide, Release 10.1 (x) 3

Zero Touch Provisioning Implementation and Troubleshooting Tips - Cisco 4