HPE Aruba Certified Certification HPE7-A07 Updated Exam

In a VXLAN environment, unknown unicast traffic, such as ARP requests from H1, which does not have a specific destination MAC address learned by the switch A2, will be flooded out of all interfaces. This flooding behavior is necessary because A2 needs to ensure that the ARP request reaches its intended destination, which might be on any of the interfaces. It's a part of the standard behavior of switches to handle ARP traffic when the destination hardware address is unknown.

During the testing of RadSec authentication over VXLAN, if the RadSec connection fails during the digital certificate exchange, it typically indicates an issue with the establishment of the TLS tunnel, which is required for RadSec's secure communication. The failure of TLS tunnel establishment can occur due to RADIUS TCP packets being dropped, preventing the secure exchange of digital certificates necessary for RadSec authentication. The other options, such as IPv6 address reachability, tracking mode settings, and proxy server misconfiguration, are not directly related to the failure of the TLS tunnel establishment during the certificate exchange process

Comprehensive and Detailed Explanation From Exact Extract of HPE Aruba Networking Switching:

In HPE Aruba Networking User Experience Insight (UXI), when a sensor performs continuous network and application testing, it generates packet captures as part of the diagnostic information available for download from the UXI dashboard. These captures are packaged into a compressed (.zip) file that typically contains multiple .pcap files categorized by test results and test types.

According to the Aruba UXI operational documentation, the sensor separates captured test traffic based on success or failure results for clarity and troubleshooting efficiency. The “datagrams.pcap” file includes only packet captures of successful tests that completed as expected, while the “datagrams-failed.pcap” file contains captures for failed or incomplete tests.

Therefore, if you review only the datagrams.pcap file, you will see data from tests that passed successfully and will not find the failed attempts that may reveal connectivity or performance problems. To analyze failure-related issues (for instance, packet loss, authentication failures, or latency problems), it is necessary to examine the “datagrams-failed.pcap” file included in the same downloaded archive.

This behavior ensures a logical separation between functioning and problematic test sessions and allows engineers to focus analysis on the most relevant captures without confusion between successful and failed transactions.

The CLI output displays EVPN routes and their corresponding next hops. The "Route Distinguisher" entries followed by IP addresses in the 172.21.11.x range indicate these are loopback addresses used by the underlay network. The underlay network provides the basic routing and forwarding plane for the overlay network that EVPN is part of. These loopback addresses are crucial for the proper functioning of the EVPN control plane.