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NEW QUESTION # 136
A customer has set global qos trust dscp on an HPE Aruba Networking CX 6300 VSF configuration, which replaced the existing HPE Aruba Networking 5406R VSF. After the change, a video streaming service connected to ports 1/1/20 and 2/1/20, bound to LAG 20, no longer maps to the CoS priority queue mappings used in the old configuration.
What configuration change would enable priority trust on DSCP by default and on traffic that requires CoS?
Answer: D
Explanation:
To resolve this QoS mapping issue on AOS-CX , you must understand the hierarchy of Trust Levels and how they interact with Link Aggregation Groups (LAGs) .
* Trust Hierarchy: AOS-CX switches use a " top-down " approach for QoS.
* Global Trust: Setting qos trust dscp globally means that, by default, every port on the switch will look at the Layer 3 DSCP markings to determine queue priority.
* Interface Override: You can override the global setting on a per-interface basis. If a specific device or service (like the video streaming service in this prompt) relies solely on Layer 2 CoS (802.1p) markings rather than DSCP, the switch will ignore those CoS markings under the global DSCP policy and place the traffic in a default (best-effort) queue.
* LAG Configuration Logic: In the AOS-CX architecture, a LAG is a logical interface (interface lag 20).
* Configuration parameters for the bundle (such as VLANs, ACLs, and QoS trust) should be applied to the logical LAG interface , not the individual physical member ports (1/1/20 and 2/1
/20).
* Once applied to the LAG, the settings are automatically inherited by all physical members.
* Analyzing the Options:
* Option D (Correct): By entering the interface lag 20 context and applying qos trust cos, you are instructing the switch to ignore the global DSCP setting for this specific bundle and instead trust the Layer 2 priority bits. This allows the video service to once again map correctly to the intended priority queues.
* Option A: This is unnecessarily complex. Setting the physical member ports to qos trust none and then the LAG to cos is redundant because the LAG configuration overrides the physical port settings in this context.
* Option B: qos trust dscp, cos is not a valid AOS-CX command. Unlike the older AOS-S (ProCurve) software which allowed a combined dscp-cos trust, AOS-CX requires you to choose a single trust type (DSCP, CoS, or None) per interface.
* Option C: This applies the configuration to the physical ports only. In an AOS-CX VSF/LAG environment, this is considered a configuration error or " best practice " violation, as the logical LAG interface should hold the configuration.
NEW QUESTION # 137
Refer to the exhibit:
Using the configuration below, you have configured OSPF at a small branch site, which only requires a single default route to reach the Internet and all other sites. When examining the routing table, you still see other OSPF routes besides the default route.
What OSPF area type should you configure?
Answer: D
Explanation:
The exhibit shows a configuration for a standard Stub Area (area 1 stub). To meet the customer requirement of having only a default route, we must understand how OSPF area types filter Link State Advertisements (LSAs).
Stub Area (Current Config): Blocks Type 5 (External) LSAs. The Area Border Router (ABR) injects a Type 3 LSA default route. However, Type 3 LSAs (Inter-Area routes from other parts of the OSPF network) are still allowed in. This explains why the user still sees other OSPF routes in the table.
Totally Stubby Area (The Solution): This area type is a Cisco/Aruba enhancement to the OSPF standard. It blocks both Type 5 (External) and Type 3 (Inter-Area) LSAs. The ABR replaces all of these with a single Type 3 default route. This is the most efficient configuration for a small branch switch with limited memory and a single exit point.
AOS-CX Configuration: To convert the current " Stub " to a " Totally Stubby " area, you would add the no- summary keyword on the ABR:
Bash
router ospf 1
area 1 stub no-summary
Why other options are incorrect:
Option A and D: NSSA (Not-So-Stubby Areas) are used when you need to redistribute external routes from the branch into the rest of the OSPF network. The prompt doesn ' t mention a local external source.
Option B: This is what is currently configured and is explicitly described as not meeting the requirement.
NEW QUESTION # 138
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 AS 65100?
Answer: A
Explanation:
An eBGP relationship is established between BGP routers belonging to different autonomous systems . In this scenario, the local Aruba AOS-CX switch operates in AS 65010 , while the neighboring router belongs to AS 65100 , making the relationship external BGP. AOS-CX defines the neighbor ' s AS with the neighbor < IP-address > remote-as < AS-number > configuration; for this topology, the remote AS would be 65100 . HPE Aruba documentation confirms that an eBGP neighbor ' s remote AS must differ from the local BGP AS.
Aruba Networks Developer Hub
By default, AOS-CX permits an external BGP session to be established with a directly connected external peer . HPE Aruba specifically documents that eBGP peers on non-directly-connected networks require neighbor ... ebgp-multihop; therefore, ordinary eBGP operation assumes direct connectivity. Aruba Networks A route reflector is an iBGP scaling mechanism , not an eBGP establishment requirement. Option D is also incorrect because AOS-CX uses address-family ipv4 unicast, rather than an "ipv4 internal" address family.
Option A specifies AS 65001, which does not correspond to the stated remote AS 65100.
Study Guide References: BGP Fundamentals; eBGP Neighbor Establishment; neighbor remote-as; eBGP Multihop; IPv4 Unicast Address Family.
NEW QUESTION # 139
Which CLI command assigns a DSCP value to a traffic class in an Aruba CX QoS policy?
Answer: A
Explanation:
The class-map command defines traffic classification rules, allowing specific DSCP-marked traffic to be grouped for priority handling in QoS policies.
NEW QUESTION # 140
Which two CLI commands are used to assign an IP address to a VLAN interface? (Select two)
Answer: C,D
Explanation:
The interface vlan 10 command selects a VLAN interface, while ip address 192.168.1.1/24 assigns an IP address, enabling Layer 3 functionality on the switch.
NEW QUESTION # 141
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