HP HP ASE - FlexNetwork Architect V2, HP ASE - FlexNetwork Integrator V1 HP2-Z31 Questions & Answers

• Question 41:

  Which service on the HP VAN SDN Controller allows Observation posts to be set on a network?

  A. Network Node Service

  B. Path Diagnostic Service

  C. Path Daemon Service

  D. Topology Service

  Correct Answer: B

  Path Diagnostics Determines and verifies the path taken by a specific packet from a source host to destination host. Evaluates flows configured across the switches in the control domain for diagnosis Creates `Observation posts' on every switch in the path that the packet would take Tallys packet_ins from the observation posts to figure out where a path is broken Lists neighbors for any given device

  Reference: HP VAN SDN Controller Administrator Guide

• Question 42:

  Which important functions does the HP VAN SDN Controller provide for an SDN deployment? (Select two.)

  A. It discovers HP switches using SNMP. configures OpenFlow on them, and enables the OpenFlow instances.

  B. It provides a platform for SDN applications and mediates between these applications and network infrastructure devices.

  C. It delivers comprehensive, policy-based management for both traditional networks and SDN networks, enabling gradual integration of SDN applications.

  D. It uses APIs to expose an abstracted and centralized control plane to network applications.

  E. It provides built-in templates for provisioning virtual machine network connectivity and automatically applies those templates as required.

  Correct Answer: BC

  The HP VAN SDN Controller is a Java-based OpenFlow controller enabling SDN solutions such as network controllers for the data center, public cloud, private cloud, and campus edge networks. This includes providing an open platform for developing experimental and special- purpose network control protocols using a built-in OpenFlow controller.

  The HP VAN SDN Controller is a platform for developing SDN applications and deploying SDN applications. The controller can be characterized as providing a Base Control Platform, a Distributed Platform for High-Availability and Scalability, and an Extensible Platform.

  Reference: HP VAN SDN Controller Administrator Guide

• Question 43:

  Which northbound API for external applications do developers use to communicate with the HP VAN SDN Controller?

  A. JSON

  B. NETCONF

  C. HTTPS

  D. REST

  Correct Answer: D

  PLUMgrid's proprietary controller is designed to maintain control of its network virtualization solution and is not targeted at controlling external elements today. Like other network virtualization-focused controllers, it provides RESTful APIs in the form of proprietary northbound interfaces.

  Reference: SDN Controller Wars 2.0 ON.LAB and Juniper Re-Ignite the Open-Source Battleground. Part 1 of 2 http://www.sdncentral.com/market/controller-onlab-juniper-open-source-sdn-battleground- part1/2013/12/

• Question 44:

  HP IMC provides comprehensive Fault Configuration, Accounting. Performance and Security functionality. Which functionality does the HP IMC SDN Manager provide? (Select three.)

  A. Accounting

  B. Reporting

  C. Performance

  D. Fault

  E. Configuration

  Correct Answer: ACE

  A, B, C IMC VAN SDN Manager will feature full-fault, configuration, accounting, performance and security management for HP enabled SDN domains.. · Enable deployment, monitoring and management of HP OpenFlow enabled switches

  *

  Visualize traffic flow and performance monitoring in HP SDN Domains

  *

  Backup and restore configurations and software of HP SDN Controllers · Provide graphical OpenFlow troubleshooting with path analysis

  Reference: HP IMC Virtual Application Networks Modules

• Question 45:

  Which HP VAN SDN Controller service processes ARP replies in Packetin messages sent by the OpenFlow switches?

  A. Controller Service

  B. Path Daemon

  C. Path Diagnostics Service

  D. Node Manager

  Correct Answer: D

  Node Manager

  Operation:

  Learns and maintains end-host locations in the network. Uses information received from network devices

  to maintain the ARP table and end host data.

  Uses the Topology Service to determine if a port receiving a packet is an edge port or not.

  Learns and maintains end nodes in the controller domain, and associates end nodes with edge ports.

  Builds an ARP cache with MAC-IP translations of end hosts.

  Maintains ARPs on a per-VID basis.

  Provides the edge port details for end hosts.

  Reference: HP VAN SDN Controller Administrator Guide

• Question 46:

  Why would an architect require an application to be written as an internal application rather than as an external application?

  A. lower cost of development

  B. faster event-driven responses

  C. greater flexibility of platform choices

  D. increased program language options

  Correct Answer: B

  HP SDN Controller Internal Applications and Modules There are two main ways applications interact with the controller: Within the controller using native applications or modules (Java based or byte compatible applications

  such

  as Scala).

  Outside the controller using web based applications (using RESTful APIs).

  Application Types:

  Native Applications / Modules - This is the ideal model for applications that need to exert relatively

  finegrained,

  frequent and low-latency control interactions with the environment, e.g. handling packet-in events,

  etc.

  Web Based applications - Suitable for applications that need to exert "business" level, i.e.

  relatively coarsegrained, infrequent and high-latency control interactions with the environment, e.g. path provisioning, flow inspections, etc.

  Reference: HP SDN Controller Architecture, Technical Solution Guide

• Question 47:

  Which protocol is used to discover directly connected links between OpenFlow devices?

  A. SNMP

  B. CDP

  C. OF-CONFIG

  D. LLDP

  Correct Answer: D

  LLDP is used to discover direct links between switches and BDDP is used to discover the switches in the same broadcast domain.

  Note: Using a link-discovery module, the controller generates both LLDP and broadcast packets (referred to as BDDPs) and sends them to all neighboring switches on a regular basis.

  Reference: OpenFlow Controller

• Question 48:

  A network integrator plans to implement the HP Network Protector SDN application in a network. What is a key consideration with regards to the OpenFlow protocol implementation and switch selection?

  A. If the access switch supports PACKETIN

  B. If the core switch supports PACKETIN

  C. If the access switch supports FORWARD_NORMAL

  D. if the core switch supports FORWARD_NORMAL

  Correct Answer: A

  Note:

  *

  The PacketIn message is a way for the switch to send a captured packet to the controller. There are two reasons why this might happen; there could be an explicit action as a result of a match asking for this behavior, or from a miss in the match tables, or a ttl error.

  *

  Flowchart detailing packet flow through an OpenFlow switch.

  

  Reference: OpenFlow Switch Specification Version 1.3.1

• Question 49:

  Which mechanism provides authentication of API calls via the REST API within the HP VAN SDN Controller?

  A. Openstack Keystone

  B. Java

  C. RabbitMQ

  D. Openstack

  Correct Answer: A

  The SDN controller uses Openstack Keystone as an identity management for managing users, generating tokens, as well as token validation.

  Reference: HP VAN SDN Controller Administrator Guide

• Question 50:

  A controller is able to register for asynchronous messages from an OpenFlow switch, but when the controller attempts a flow_mod. the OpenFlow command is rejected. Which mode is the controller in from the switch point of view?

  A. Leader

  B. Slave

  C. Master

  D. Equal

  Correct Answer: B