Cisco 300-635 Automating Cisco Data Center Solutions (DCAUTO) Exam Practice Test

When using the Cisco Intersight API, the Secret Key is only available at the time of API Key creation, which is why option B is correct. An API Key is indeed composed of a Key ID and Secret Key, making option C correct as well. The other options do not apply as per the standard practices for API authentication

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.

The ACI Cobra SDK is a Python library provided by Cisco for interacting with the Application Centric Infrastructure (ACI). The code in the image uses this SDK to log into an APIC controller, which is the central management entity for the ACI fabric. After logging in, it creates a class query for ‘fvCEp’, which stands for Fabric Endpoint. This class contains information about endpoints within the ACI fabric, including their MAC and IP addresses.

The ‘subtree’ property set to ‘full’ indicates that the query will return all objects within this class’s subtree, meaning it will retrieve detailed information about each endpoint. The mo_dir.query(cq) method executes this query against the APIC.

Finally, for each object returned by the query (each endpoint), it prints out two attributes: ‘mac’ and ‘ip’. These attributes correspond to the MAC address and IP address of each endpoint in the ACI fabric. Therefore, option C is correct as this code prints all endpoint MAC and IP addresses.

References:

Implementing Automation for Cisco Data Center Solutions (DCAUI)

Cisco Learning Network - Data Center Training Videos

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

GET, firmware, RunningFirmwares

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

To ensure Docker daemon persistence during a switchover on Cisco Nexus 9500 Series Switches running Cisco NX-OS, the Docker configuration must be changed to include the live restore option. This option allows running containers to continue operating during the daemon downtime, which is particularly useful during a switchover. References: Cisco Nexus 9500 Series documentation and Docker official documentation.

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.

The -brief command in the Cisco bigmuddy-network-telemetry-collector is used to display only the message headers. This command provides a concise view of the telemetry data streamed from XR routers, which is useful for quick inspections or debugging purposes without the need for full message details1.

References := Cisco Code Exchange, VCEGuide

 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

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 infrastructure12.

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 Python script uses the ACI Cobra SDK to interact with Cisco’s Application Centric Infrastructure (ACI). It logs into the APIC and retrieves a list of all application profiles (‘fvAp’), then prints out their distinguished names (dn), which uniquely identify each application profile within the ACI fabric. References:

Cisco Developer Network

Cisco Learning Network

The error message “Request failed ” indicates that the Ansible playbook is trying to connect to the Cisco NX-OS switch using HTTP but is unable to establish a connection. This can be due to the HTTP server feature not being enabled on the NX-OS device. Enabling an HTTP server on a Cisco NX-OS device allows for remote management of the device via HTTP, which is what the Ansible playbook is attempting to do.

To resolve this issue, one would need to enable the HTTP server on the Cisco NX-OS switch. The command http-server enabled specifically enables the HTTP server feature, allowing for remote connections such as those attempted by Ansible playbooks.

References :=

Implementing Automation for Cisco Data Center Solutions (DCAUI) - 6

Cisco Learning Network - Automating Cisco Data Center Solutions Videos - 7 

conf t

Event manager applet link monitor

Event syslog pattern “IF_UP”

Action 1 cli command “source cdp_description.py”

Exit

To enable the REST API browser within Cisco UCS Director, a user must edit their profile to enable developer options. This action provides access to the REST API browser, which is a powerful tool for automating tasks and operations within the Cisco UCS Director environment.

References := Implementing Automation for Cisco Data Center Solutions (DCAUI)

The Python code in the exhibit is using the Cobra SDK to interact with Cisco’s Application Centric Infrastructure (ACI). The code performs the following actions:

It logs into the ACI fabric using credentials provided.

It creates a new Virtual Routing and Forwarding (VRF) instance named “DevNet_VRF” within a tenant named “DevNet_Tenant”.

It creates a new Bridge Domain (BD) named “DevNet_BD” within the same tenant and associates it with the previously created VRF.

It defines a subnet within this Bridge Domain with the network address “10.10.10.1/24”, which is labeled as “DevNet_Subnet”.

An Application Profile (AppProfile) named “DevNet_App” is created within the tenant.

An Endpoint Group (EPG) named “DevNet_EPG” is created and associated with both the AppProfile (“DevNet_App”) and BridgeDomain (“DevNet_BD”).

Therefore, options B and C are correct: B. This action creates an EPG called “DevNet_EPG” inside an AppProfile called “DevNet_App” located in an ACI tenant called “DevNet_Tenant”. The EPG is linked to a BridgeDomain called “DevNet_BD”. C. This action creates a subnet called “DevNet_Subnet” inside VRF “DevNet_VRF” located in an ACI tenant called “DevNet_Tenant” and sets its network address to “10.10.10.1/24”.

References :=For more information on automating Cisco Data Center Solutions, one can refer to Cisco’s official training course for Implementing Automation for Cisco Data Center Solutions (DCAUI): Cisco Training Course

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 enable Bash shell on a Cisco Nexus 9000 Series Switch running NX-OS, the command feature bash-shell must be used. This command activates the Bash shell feature within NX-OS, allowing for advanced scripting and automation capabilities directly on the switch. It’s important to note that proper authorization should be ensured before using this command, and its implications for security and operations should be understood. References :=

Official Cisco Nexus 9000 Series NX-OS Fundamentals Configuration Guide

Cisco Community Discussion on Enabling Bash Shell