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

 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 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 modules1.

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

Simple Network Management Protocol (SNMP) traditionally operates on a pull model where the management system periodically polls or requests information from network devices at set intervals. In contrast, model-driven telemetry is designed to use a push model where information is sent by network devices to the management system proactively when certain conditions are met or at set intervals without waiting for an explicit request from the management system. References := Cisco IOS XE Model-Driven Telemetry

 To update the firmware on a specific Cisco UCS rack server managed by Cisco Intersight using a Python script, the script must include a GET request to retrieve the server with the specified AssetTag and then update the firmware JSON body with the server’s Managed Object ID (Moid). The correct statements to complete this task would be:

A GET request that queries the Intersight API for the server with the given AssetTag (Option A).

An update to the firmware JSON body dictionary, setting the ‘Server’ key to the ‘Moid’ value obtained from the GET request response (Option D).

References:

Cisco Intersight API documentation for details on API endpoints and query parameters.

Python requests library documentation for constructing and executing HTTP requests.

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

To isolate a new package from the main code base, creating a new virtual environment is the best practice. This allows for the installation and testing of the new package without affecting the existing code or dependencies. Performing a pip install of the new package within this isolated environment ensures that any potential issues or conflicts are contained. References :=

General best practices in software development for package management and virtual environments.

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

The top level in the ACI Management Information Tree is polUni. This is the top-level class for all policy definition and resolution objects within the Cisco ACI Policy Model. It serves as the root for policy namespace in the Management Information Tree12.

References :=

Cisco ACI Policy Model Guide1

Understanding the Cisco Application Policy Infrastructure Controller2

 To retrieve server profiles with “WEST15” in the name, the correct GET API request is D. GET https://intersight.com/api/v1/server/Profiles?$select=Name &$filter=startswith(Name, ‘WEST15’). This request filters the server profiles to only those that start with “WEST15”. For updating the name, option E is correct. The BODY = {” Name”: sp_name.replace(‘WEST15’,’LXT14’)} uses the Python replace method to change “WEST15” to “LXT14” in the server profile name. References: Cisco Intersight API documentation and Python programming resources.

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 DCNM API is REST-based, allowing third parties to test and develop application software. It supports a wide range of operations that can also be performed using the DCNM GUI, which uses these REST APIs to render the GUI itself. This means that the same tasks available through the API can be accessed and managed through the graphical user interface, providing flexibility in how network administrators interact with DCNM23.

References := Cisco DCNM REST API Guide, Cisco Community

The EEM script in the exhibit is designed to monitor for specific syslog messages. If any of the patterns specified (“copy bootflash:* running-config”, “copy run start”, or “Hello”) occur within a 120-second window, the script will trigger the reload of module 1 on the Cisco Nexus 9000 switch. This action is based on the occurrence of any one of the patterns, not all, which aligns with option B. References:

Implementing Automation for Cisco Data Center Solutions (DCAUI) course material

Cisco Nexus 9000 Series NX-OS System Management Configuration Guide

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.

In Cisco’s ACI, the Management Information Tree (MIT) uses several attributes to uniquely identify managed objects. ‘RN’ stands for Relative Name, which is the name of an object within its parent’s context. ‘DN’ stands for Distinguished Name, which is a unique name that includes the full path in the MIT hierarchy.

Cisco ACI Documentation

Step 1 : The switch searches for a Domain Host Configuration Protocol service on the network

Step 2 : DHCP assigns the switch an IP Address, default gateway, and IP address that are tracked by the Domain Name System server.

Step 3 : POAP gets the IP address of a script server, downloads the correct script for the switch, and runs the script on the switch.

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