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NEW QUESTION # 117
You are configuring OSPF between two CX switches but cannot see any neighbors. Based on the output, how would you fix the problem?
- A. Remove the max-metric router-lsa on-startup to allow faster formation of adjacency.
- B. Configure no ip ospf cost 100 on the VLAN 182 interface.
- C. Configure no passive-interface vlan182 on the switch.
- D. Configure ip ospf network broadcast on the VLAN 182 interface.
Answer: C
Explanation:
OSPF neighbors not forming adjacency and stuck in the 2WAY state typically indicates that the interface is set to passive mode, preventing OSPF Hello packets from being sent or received on that interface.
Removing passive mode on VLAN 182 allows OSPF Hello messages to be exchanged and adjacency to form.
Options involving network type or costs do not affect adjacency states related to passive interfaces.
The max-metric router-lsa on-startup affects LSA advertisements, not adjacency formation.
Therefore, the fix is to configure no passive-interface vlan182.
References:
ArubaOS-CX OSPF Troubleshooting Guide
OSPF Protocol RFC 2328
HPE Aruba Networking Configuration Guides
NEW QUESTION # 118
An Aruba CX B100 VSX has the following state for LACP:
2024-06-08T19:48:34.713434+03:00 VSX1 lacpd[837]: Event|1321|LOG_INFO|AMM|1/1|LAG 253 State change for interface 1/1/25:3: Actor state: ALFNCD, Partner state: ASFNCD
2024-06-06T19:48:34.675496+03:00 VSX1 lacpd[837]: Event|1308|LOG_INFO|AMM|1/1|LACP rate set to slow for LAG 253 What can be observed based on the output?
- A. The LAG 253 has been negotiated automatically with peer timeout values
- B. The global LACP rate has been configured for LACP ports
- C. The LAG 253 has a mismatching configuration with a peer
- D. The local LAG 253 has a matching LACP configuration with peer
Answer: D
Explanation:
The LACP state event Actor state: ALFNCD, Partner state: ASFNCD indicates that the LACP negotiation between the local (actor) and peer (partner) is successful with all flags matching and no errors.
ALFNCD and ASFNCD are standard LACP states indicating Active, Long timeout, Aggregation capable, Not synchronized, Collecting, and Distributing flags set as expected.
Also, the log shows the LACP rate is set to slow, which is the default.
Thus, the output shows the LAG 253 has a matching LACP configuration with its peer.
References:
ArubaOS-CX LACP Debugging and Logs Guide
IEEE 802.3ad Link Aggregation Control Protocol Specification
Aruba VSX LAG Best Practices Documentation
NEW QUESTION # 119
Which tool provides real-time monitoring and troubleshooting for Aruba switches?
Response:
- A. Aruba NetEdit
- B. Aruba Central
- C. SNMP
- D. Wireshark
Answer: B
NEW QUESTION # 120
Examine the partial output of the BGP routing table of an AOS-CX switch:
The switch is learning about four possible path to reach the 1.0.0.0/8 network. Based on this output, which next-hop route will the AOS-CX select to be placed in the IP routing table?
- A. 192.168.2.5
- B. 192.168.3.5
- C. 192.168.4.5
- D. 192.168.1.5
Answer: B
NEW QUESTION # 121
Which protocol is essential for preventing loops in Layer 2 networks?
Response:
- A. RIP
- B. OSPF
- C. STP
- D. VRRP
Answer: C
NEW QUESTION # 122
What is correct regarding rate limiting and egress queue shaping on AOS-CX switches?
- A. Rate limiting and egress queue shaping can be applied globally
- B. Traffic rate limit is configured on queue level
- C. Limits can be defined only for broadcast and multicast traffic
- D. Rate limiting and egress queue shaping can be used to restrict inbound traffic
Answer: B
NEW QUESTION # 123
Refer to the exhibit:
The customer would like to utilize Dynamic Segmentation for wired users in Building B.
Which statement is true about the scenario?
- A. The CX 6100 switches would need to be replaced with CX 6300 models.
- B. The CX 6100 switches need to have the CX Advanced license applied to support the requirement.
- C. The CX 6100 switches need to have a static VXLAN tunnel to the HPE Aruba Networking CX 8325.
- D. The CX 6100 switches need to have a GRE tunnel to the HPE Aruba Networking 9200.
Answer: A
Explanation:
Dynamic Segmentation (DS) requires certain capabilities on the switches to support user role assignment and traffic segmentation based on identity. The CX 6100 series switches do not support Dynamic Segmentation due to hardware and feature limitations. Therefore, they must be replaced with CX 6300 models, which support DS features natively.
Options involving GRE tunnels or VXLAN tunnels relate to traffic forwarding but do not enable DS on unsupported hardware.
Applying licenses does not upgrade hardware capabilities for DS.
References:
Aruba Dynamic Segmentation Deployment Guide
Aruba CX Switch Features Matrix
ArubaOS-CX Licensing and Feature Support Documentation
NEW QUESTION # 124
An administrator is managing a pair of core AOS-CX switches configured for VSX. Connected to this core are pairs of aggregation layer AOS-CX switches configured for VSX. OSPF is running between the aggregation and core layers. To speed up OSPF convergence, the administrator has configured BFD between the core and aggregation switches.
What is a best practice the administrator should implement to reduce CPU processing on the switches if a BFD neighbor fails?
- A. Increase the VSX keepalive timer
- B. Implement graceful restart
- C. Increase the BFD echo timers
- D. Disable ICMP redirects
Answer: D
Explanation:
In some cases, the ech could have a source and destination on the same subnet, which would usually trigger the switch to send an ICMP redirect. The extra processing can cause issues on the Switch. Disabling ICMP redirects prevenets these issues.
NEW QUESTION # 125
An administrator is implementing a multi-area OSPF network. The network contains a backbone (area 0) and two other areas (1 and 2) connected to ABRs in the backbone The network has one routing switch connected to a service provider located in area 2 Which network design would minimize the number of routes in the routing switches' link state databases (LSDBs) while still allowing full connectivity?
- A. Area 0: Normal
Area 1: Totally stubby
Area 2: Totally not-so-stubby - B. Area 0: Normal
Area 1: Totally stubby Area 2: Totally stubby - C. Area 0: Not-so-stubby
Area 1: Totally not-so-stubby Area 2: Totally not-so-stubby - D. Area 0: Normal
Area 1: Totally not-so-stubby Area 2: Totally stubby
Answer: C
NEW QUESTION # 126
You need to configure BGP on an HPE Aruba Networking switch using AS 65010. What is required when establishing peering with neighboring devices using eBGP that are not directly connected?
- A. Use of ebgp-multihop
- B. Use of route-reflector
- C. Use of address-family ipv4 external
- D. Use of next-hop-self
Answer: A
Explanation:
When establishing eBGP peering between devices that are not directly connected, the TTL (Time To Live) value of the BGP packets must be increased to allow them to traverse multiple hops. This is achieved by configuring ebgp-multihop, which increases the TTL beyond the default value of 1.
next-hop-self changes the BGP next-hop attribute but is not required for multihop eBGP.
route-reflector is a BGP design feature unrelated to multihop.
address-family ipv4 external is not a standard command on Aruba CX switches.
Therefore, to successfully peer eBGP sessions across multiple hops, ebgp-multihop must be configured.
References:
ArubaOS-CX BGP Configuration Guide
RFC 4271 (BGP-4)
HPE Aruba Networking Best Practices for BGP
NEW QUESTION # 127
What should be done before upgrading Aruba switch firmware to prevent configuration loss?
Response:
- A. Perform a full backup of the switch configuration
- B. Disconnect the switch from the network
- C. Enable STP on all ports
- D. Reset the switch to factory defaults
Answer: A
NEW QUESTION # 128
What does it mean when an event like the one below is seen on the HPE Aruba Networking CX switch?
2024-04-04T08:35:38.312254+00:00 ICX-Core-1 hpe-vaxd[2167]: Event[701|LOG_INFO|AMM1/1|VSX2 state local up, remote down]
- A. The physical interface of LAG 2 on the secondary VSX member is down.
- B. VSX secondary switch is down.
- C. The multichassis LAG 2 interface is down on both switches.
- D. VSX keepalive has detected that the secondary member is down.
Answer: B
Explanation:
The event message:
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2024-04-04T08:35:38.312254+00:00 ICX-Core-1 hpe-vaxd[2167]: Event[701|LOG_INFO|AMM1/1|VSX2 state local up, remote down] indicates that the local VSX member is up, but the remote VSX member is down. In a VSX pair, both switches must be operational for full redundancy and synchronization.
This log means the secondary VSX switch (remote) is down or unreachable, causing loss of synchronization and possibly traffic failover issues.
Option B (keepalive detection) is related but the event specifically shows the state of the remote switch being down.
Options C and D refer to LAG or interface state, which are not what this log entry describes.
References:
HPE Aruba VSX Troubleshooting Guide
ArubaOS-CX System Event Logs and Interpretation
VSX High Availability Documentation
NEW QUESTION # 129
Which AOS-CX feature is used to prevent head-on-line (HOL) blocking?
- A. VSF
- B. WFQ
- C. VOQ
- D. VSX
Answer: C
NEW QUESTION # 130
A network administrator is implementing BGP for a larger network. The network has over 20 exit points across 15 different BGP routers. The administrator does not want to implement a fully- meshed iBGP peering between all BGP routers.
Which feature should the administrator implement to reduce the number of peers the administrator needs to define?
- A. Route reflectors
- B. Peer-Groups
- C. BFD
- D. Next-hop-self
Answer: B
NEW QUESTION # 131
What should you configure for an interface connected to a device you cannot trust to assign DSCP markings?
(Select two.)
- A. Configure Weighted Fair Queuing
- B. Apply a dscp-map to the interface to assign a Local Priority value
- C. Apply a classifier-based policy to the interface to assign a Local Priority value
- D. Configure "qos trust cos"
- E. Configure "qos trust none"
Answer: C,E
Explanation:
For an interface connected to an untrusted device regarding DSCP markings, the recommended configurations are:
Apply a classifier-based policy to assign a Local Priority value (Option B). This overrides or marks traffic based on predefined criteria.
Configure qos trust none (Option E) to disable trusting DSCP or CoS markings from the device, preventing manipulation of QoS.
Trusting CoS (Option A) is incorrect because the device is untrusted.
DSCP maps and Weighted Fair Queuing (Options C and D) are additional QoS features but do not specifically address untrusted markings.
References:
ArubaOS-CX QoS Configuration Guide
HPE Aruba Networking QoS Best Practices
Aruba CX Trust Model Documentation
NEW QUESTION # 132
An administrator wants to ensure that only authorized devices can connect to specific switch ports. Which security feature should be configured?
- A. 802.1X
- B. QoS
- C. DHCP Snooping
- D. ACL
Answer: A
NEW QUESTION # 133
A network engineer is using NetEdit to manage AOS-CX switches. The engineer notices that a lot of third-party VoIP phones are showing up in the NetEdit topology. The engineer deletes these, but they are automatically rediscovered by NetEdit and added back in.
What should the administrator do to solve this problem?
- A. Disable SSH access on all the VoIP phones
- B. Change the VoIP phone SNMP community string to something unknown by NetEdit
- C. Disable LLDP globally on the AOS-CX switches where phones are connected
- D. Disable the RESTful API on all the VoIP phones
Answer: B
Explanation:
Netedit uses LLDP to discover the devices, but it adds them in the topology only if the credentials set for the subnet work with those devices. Credential you can set are:
- SNMP
- SSH
- SNMP
NEW QUESTION # 134
Which steps should be followed to configure Layer 2 VLANs on Aruba switches?
(Select two.)
Response:
- A. Enable LLDP globally
- B. Enable DHCP relay
- C. Create a VLAN and assign it a name
- D. Assign VLAN ID to the switch interface
Answer: C,D
NEW QUESTION # 135
An administrator has configured the following on an AOS-CX switch:
What is the correct ACL rule configuration that would allow traffic from anywhere to reach the web ports on the two specified servers?
- A. access-list ip server 10 permit tcp any web-servers group web-ports
- B. access-list ip server 10 permit tcp any web-servers web-ports
- C. access-list ip server 10 permit tcp any group web-servers group web-ports
- D. access-list ip server 10 permit tcp any object-group web-servers object-group web-ports
Answer: A
Explanation:
CLI Context tested and approved
Switch1(config-acl-ip)# show run cur
access-list ip server
10 permit tcp any web-servers group web-ports
NEW QUESTION # 136
Which HPE Aruba solutions allow remote switch management?
(Select two.)
Response:
- A. Aruba Central
- B. RADIUS
- C. NetFlow
- D. Aruba NetEdit
Answer: A,D
NEW QUESTION # 137
Which best practices help optimize network performance?
(Select two.)
Response:
- A. Using static IPs only
- B. Implementing QoS policies
- C. Configuring redundant links
- D. Increasing the number of VLANs per port
Answer: B,C
NEW QUESTION # 138
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