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Question 21

Identify the required configuration steps to enable DHCP EndpointProfiling with HPE Aruba Networking ClearPass. (Not all will be used)

Correct Answer:

Explanation:

To enable DHCP Endpoint Profiling, the switch needs to forward relevant DHCP packets from the client to the ClearPass server. The most common method is configuring the switch to act as a DHCP relay agent for the ClearPass server IP address on the client VLAN's Switched Virtual Interface (SVI).
In scenarios where port access control (like 802.1X or MAC Auth) is enabled, clients might need to send DHCP requestsbeforethey are fully authenticated. To allow this while maintaining security, a pre- authentication role with limited access (specifically allowing DHCP) can be applied to the port initially.
The logical sequence based on the provided steps, assuming a pre-authentication workflow is intended, is:
* Create the role:Define the pre-authentication role container and associate it with the appropriate initial VLAN if needed.
* Permit DHCP in the role:Apply an Access Control List (ACL) or policy to this role that permits the necessary DHCP traffic (UDP ports 67 and 68). The step provided only mentions UDP 67, which allows the client's initial Discover/Request packets towards the server/relay. (A complete solution requires allowing return traffic on UDP 68 as well).
* Apply the role:Configure the client-facing physical interface to use this pre-authentication role before the final role is assigned post-authentication.
* Configure DHCP Relay:Configure the ip helper-address <clearpass_ip> command on the client's VLAN SVI. This instructs the switch to forward the DHCP packets it receives from clients in that VLAN to the ClearPass server (in addition to forwarding them to the actual DHCP server). ClearPass receives these packets and extracts information for profiling.
This sequence ensures that even before full authentication, DHCP is permitted, and the necessary packets are relayed to ClearPass for profiling.
References:AOS-CX Security Guide (Port Access, Roles, AAA), AOS-CX IP Helper / DHCP Relay Guide, ClearPass Deployment Guides (Endpoint Profiling using DHCP). This relates to "Authentication
/Authorization" (9%), "Security" (10%), and "Switching" (19%).

Question 22

Exhibit.

The customer has VSX clusters intwo locations interconnected over an MC-LAG interface.
If active-gateway configuration uses the same virtual IP address and vMAC on each of the VSX nodes, what must you take into consideration0

A.Transit traffic will Increase over the VSX interconnect MC-LAG.
B.Each ARP request will result in four responses.
C.The configuration would end up in an async setup.
D.Outbound traffic will be load-balancedover all VSX members for each session.

Correct Answer: C

The scenario describes two separate VSX clusters interconnected via MC-LAG, where both clusters are configured to use theexact samevirtual IP address and virtual MAC address for their respective Active Gateway SVIs.
* Active Gateway Scope & Conflict:Active Gateway provides a highly available default gatewaywithina single VSX cluster (L2 domain). The vIP/vMAC combination should be unique within its L2 broadcast domain.
* Interconnecting Clusters with Same vIP/vMAC:When two VSX clusters using the identical Active Gateway vIP/vMAC are interconnected at Layer 2 (even via MC-LAG), this creates a situation where the same active L2 (vMAC) and L3 (vIP) address exists in multiple places within the extended broadcast domain.
* Consequences:This leads to MAC address conflicts and L3 ambiguity. ARP resolution becomes unreliable, potentially causing ARP tables to flap on connected devices. Traffic forwarding becomes unpredictable, as packets destined for the vIP/vMAC might be delivered to the "wrong" cluster. This unstable and unpredictable state is sometimes referred to as an asymmetric or "async" setup.
* Analysis of Options:
* A: ISL traffic might change, but it's a symptom, not the root problem.
* B: Multiple ARP replies would occur, contributing to the confusion.
* C: The configuration results in an "async setup," accurately describing the unstable state caused by duplicate active L2/L3 addresses across the interconnected L2 domain.
* D: Load-balancing happens within a cluster; this setup causes conflict, not predictable load balancing across clusters.
* Conclusion:Reusing the same Active Gateway vIP and vMAC across interconnected VSX clusters is not a valid design and leads to an unstable, asymmetric ("async") environment due to address duplication within the extended L2 domain. Option C best describes this problematic outcome.
References:Aruba VSX Design and Best Practices Guides (Active Gateway uniqueness, Interconnecting VSX clusters). This relates to "Network Resiliency and virtualization" (8%), "Routing" (16%), and
"Troubleshooting" (10%) objectives.

Question 23

You want to use OSPF to advertise a only .\16 summary route for the SVlsbelow to a neighbor In the same area (area 0).
Which configuration will achieve this?

A.
B.
C.
D.
E.

Correct Answer: E

The goal is to configure OSPF on a router so that it advertisesonlya 10.1.0.0/16 summary route for the specific SVIs (VLAN 11, 12, 13, assumed to be within the 10.1.x.x range) to its OSPF neighborswithin the same area (Area 0).
* OSPF Intra-Area Behavior:A fundamental principle of OSPF (link-state protocols) is that all routers within the same area must have an identical Link State Database (LSDB) for that area. This means all routers learn about all the specific networks (Type-1 Router LSAs, Type-2 Network LSAs) within their area. OSPFv2 doesnotsupport summarizing routes in a way that hides specific network LSAs from other routerswithin the same area. Summarization occurs only at area boundaries (by ABRs using Type-
3 Summary LSAs via the area range command) or for external routes redistributed into OSPF (by ASBRs using Type-5 External LSAs via the summary-address command).
* Analysis of Options:
* A) area 0 range 10.1.0.0/16:This command is used on an Area Border Router (ABR) to summarize routes originatingfromArea 0 when advertising theminto another area(e.g., the backbone). It does not affect LSA floodingwithinArea 0. It also includes redistribute connected, which is unrelated here.
* B) summary-address 10.1.0.0/16:This command is used on an Autonomous System Boundary Router (ASBR) to summarizeexternalroutes being redistributed into OSPF. It is not used for summarizing internal OSPF routes like SVIs defined within an OSPF area.
* C) & D) summary-address 10.1.0.0/16:Same issue as B; incorrect command for summarizing internal OSPF routes.
* E) area 0 range 10.1.0.0/16:Similar to A, this uses the area range command. It correctly shows the SVIs configured for OSPF Area 0 first. However, like A, this command performs inter-area summarization on an ABR and does not suppress the specific LSAswithinArea 0.
* Conclusion:The question asks for something that OSPFv2 cannot do: advertiseonlya summary route within the same area while suppressing specifics. Therefore, none of the configurations will achieve the exactstated outcome. However, if the question is flawed and intends to ask which configuration uses the correct command structure for summarizinginternalOSPF routes (even if only effective between areas), then the area range command is the relevant one. Both A and E use this command. Option E is slightly better structured as it shows the interfaces being added to OSPF Area 0 first. Assuming this is the intended direction despite the impossibility of the specific request, E is the most plausible choice among the given options.
References:RFC 2328 (OSPFv2), OSPF Configuration Guides for AOS-CX (explaining area range for ABRs and summary-address for ASBRs). This relates to the "Routing" (16%) objective.

Question 24

A customer hassot a requirement for VLAN 151 to be an isolated VLAN. A colleague has copied and pasted a partialconfiguration, but you do not achieve the desired outcome. This is the code that was added:
What should be added to the configuration before this code to achieve the desired result?

A.
B.
C.
D.

Correct Answer: A

The customer requires VLAN 151 to be configured as an isolated Private VLAN. A partial configuration was added, but the desired outcome wasn't achieved. We need to determine which configuration snippet should be addedbeforethe (unspecified) partial configuration to correctly set up the Private VLAN structure.
* Private VLAN Configuration Fundamentals:
* APrimary VLANmust be defined. This VLAN carries traffic between promiscuous ports and ports in associated secondary VLANs.
* Secondary VLANs(either isolated or community) are associated with the primary VLAN.
* Ports are then mapped to either the primary VLAN (promiscuous ports, typically router/firewall connections) or a secondary VLAN (host ports). Isolated ports within thesameisolated VLAN cannot communicate with each other.
* Analyzing the Options (Assuming VLAN 15 is the intended Primary):
* A)
vlan 15
private-vlan primary
vsx-sync
This correctly defines VLAN 15 as the Primary Private VLAN. The vsx-sync command ensures this configuration is synchronized across a VSX pair (relevant if applicable). This is the necessary prerequisite before defining VLAN 151 as an isolated secondary VLAN and associating it with VLAN 15.
* B)isolated-vlan primary is incorrect syntax. The command is private-vlan primary.
* C)primary-vlan isolated 151 is incorrect syntax for defining either the primary or secondary VLAN type/association within the primary VLAN context.
* D)private-vlan isolated 151 within the vlan 15 context is incorrect syntax. The private-vlan isolated command belongs under the configuration of the secondary VLAN (VLAN 151 in this case).
* Conclusion:Before configuring VLAN 151 as private-vlan isolated and associating it, the primary VLAN must be defined. Option A correctly shows the command (private-vlan primary) under the intended primary VLAN's configuration (vlan 15) to establish it as the primary VLAN.
References:AOS-CX Security Guide (Private VLAN configuration steps and commands). This relates to the
"Switching" (19%) and "Security" (10%) objectives.

Question 21

Question 22

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Question 24

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