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

• Question 21:

  Which protocol does the LYNC FE Server Plugin use to communicate to the HP Network Optimizer SDN Application?

  A. OpenFlow

  B. SNMPv3

  C. Java Remote Method Protocol

  D. REST

  Correct Answer: A

  Net Optimizer - Lync uses OpenFlow to dynamically provision the end-to-end network path and QoS policy for that Lync call.

  Reference: HP Network Optimizer SDN Application -Microsoft Lync 1.1 Administrator Guide

• Question 22:

  What are internal applications that are included with the HP VAN SDN Controller? (Select three.)

  A. Capacity Planner

  B. OpenFlow Daemon

  C. Topology Manager

  D. Node Manager

  E. Path Daemon

  F. Time Daemon

  Correct Answer: CDE

  The HP VAN SDN Controller ships with a default set of core network service components, which provide

  an out-of-box experience in terms of enabling connectivity across network applications in the Openflow

  network.

  They include:

  Topology Manager

  Node Manager

  Path Daemon

  OpenFlow Node Discovery

  Link Manager

  OpenFlow Link Discovery

  Reference: HP VAN SDN Controller Programming Guide

• Question 23:

  Refer to the exhibit.

  

  The switches in the diagram are connected to each other using two physical cables. The network consists of two HP 3800 series switches and two HP 5900 series switches. Why is only one link displayed between switches in the OpenFlow Topology diagram on the HP VAN SDN Controller?

  A. The SPF algorithm used by the HP VAN SDN Controller only supports a single link between switches and blocks other links to stop loops. The HP VAN SDN Controller only displays the single active link between the switches

  B. Link aggregation is being used OpenFlow only displays information about the logical interface and not the physical interfaces. The HP VAN SDN Controller only displays a single link between switches

  C. Link aggregation is being used. One of the Interfaces in the bundle is down, and OpenFlow has updated the HP VAN SDN Controller with this information The HP VAN SDN Controller only displays the active link in the OpenFlow Topology diagram

  D. Spanning tree is blocking one of the ports. The HP VAN SDN Controller. Only displays the active link in the OpenFlow Topology diagram.

  Correct Answer: B

  Note: TopologyViewer Creates and updates a network graph for visualizing the network the controller discovers. The Topology Viewer uses the services of the Topology Manager and Link Manager.

• Question 24:

  Which protocol does HP IMC use to communicate with the HP VAN SDN Controllers?

  A. SNMP

  B. TCL

  C. Open Flow

  D. REST

  Correct Answer: D

  IMC uses a REST interface to manage the HP VAN SDN Controller Reference: Technical white paper, Mock RFI for Enterprise SDN Solutions http://h20195.www2.hp.com/V2/getpdf.aspx/4AA5-1162ENW.pdf (page 5)

• Question 25:

  Which modes does the 2.0 release of the HP VAN SDN Controller support? (Select two.)

  A. Multi active master

  B. Dual homed

  C. Clustered

  D. Team

  E. Standalone

  Correct Answer: DE

  The HP VAN SDN Controller Administrator Guide describes the configuration and management of the HP VAN Controller in standalone and team modes.

  Reference: HP VAN SDN Controller Administrator Guide

• Question 26:

  Which component synchronizes the configuration amongst a team of HP VAN SDN Controllers?

  A. Zookeeper

  B. Cassandra

  C. Virgo

  D. Keystone

  Correct Answer: A

  ZooKeeper is a centralized service for maintaining configuration information, naming, providing distributed

  synchronization, and providing group services.

  Incorrect:

  Not Cassandra: Apache Cassandra is an open source distributed database management system designed

  to handle large amounts of data across many commodity servers, providing high availability with no single

  point of failure.

  Not Keystone: The SDN controller uses Openstack Keystone as an identity management for managing

  users, generating tokens, as well as token validation.

• Question 27:

  How does an HP VAN SDN Controller team provide high availability for external applications?

  A. By using the southbound controller interface tied to a region configuration

  B. By using the southbound controller interface with a secondary interface

  C. By using the northbound controller interface tied to a region configuration

  D. By using the northbound controller interface with a secondary interface

  Correct Answer: C

  * Northbound API Relative to figure 1 below, the Northbound API is the API that enables communications between the control layer and the application layer (external business applications. Southbound API

  Relative to Figure 1 below, the Southbound API is the API that enables communications between the control layer and the infrastructure layer (OpenFlow).

  Figure 1. ONF's SDN architecture

  

  * Putting the region configurations in place in a controller team ensures seamless failover and failback among the configured controllers for the specified network devices in a region. That is, when a master controller experiences a fault, the Role Orchestration Service ensures that a slave controller immediately assumes the master role over the group of network devices to which the failed controller was in the master role.

  Reference: Technical white paper, Mock RFI for Enterprise SDN Solutions Reference: HP VAN SDN Controller Administrator Guide

• Question 28:

  Two HP OpenFlow switches are connected to an intermediate layer 2 switch running LLDP, but not OpenFlow. This intermediate switch is configured with a single VLAN. Which protocol is used by the OpenFlow switches to discover this multi-hop link?

  A. CDP

  B. ND

  C. LLDP

  D. BDDP

  Correct Answer: D

  The LLDP messages allow the link service to discover that there is physical link between two switches. If the LLDP message on one side of the link (Packet_Out) is received on the other side of the link (Packet_In) by a switch, LS knows that the two switches are connected to each other. The service is also responsible for identifying multi-hop links. These are links where non- OpenFlow devices are connected between two OpenFlow switches and thus separate the OpenFlow switches. The Link Service does this by sending BDDP (Broadcast version of LLDP) messages in addition to LLDP messages. LLDP is a one hop protocol and may be consumed by a non-OpenFlow switch because LLDP uses a multicast address which the intermediate switch may have subscribed to the LLDP multicast. However, a broadcast frame (BDDP) will be forwarded typically by the intermediate switch. BDDP has the same TLV information as LLDP.

  Reference: HP SDN Network Services Modules

• Question 29:

  Which command is a valid cURL command that can be executed against the HP VAN SDN Controller (assuming variables and scripts are configured correctly)?

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  Correct Answer: A

  Example: Install an Uploaded (STAGED) Application curl --noproxy --header X-Auth-Token: -ksS --fail --url https:// :/sdn/v2.0/apps//action/ -d install --request POST

  Incorrect Not B: incomplete command Not C: Use path /sdn/v2.0/... Not D: -H host header not specified. Reference: HP VAN SDN Controller Administrator Guide

• Question 30:

  What happens to an incoming packet that does not have a match in any of the Open Flow tables on an HP Provision switch that operates in passive mode?

  A. The packet is forwarded using legacy forwarding mechanisms.

  B. The packet is forwarded to the HP VAN SDN Controller.

  C. The packet is sent to the control plane of the switch.

  D. The packet is dropped.

  Correct Answer: A

  OpenFlow instance mode

  OpenFlow can work either in active or passive mode.

  Passive mode

  There is one-way communication from the OpenFlow controller to the switch. Packets that do not match

  any flow in the flow table on the switch are not sent to the controller. Such packets of new flows are

  handled normally by the switch (that is using legacy forwarding mechanisms).

  Active mode

  New packets of a flow that the switch is not aware of are sent to the OpenFlow controller.

  Reference: HP Switch Software OpenFlow Administrator's Guide K/KA/WB 15.14