F5 Networks F5CAB5 Exam Dumps

Troubleshooting SSL connection resets often involves verifying license limits against actual resource utilization. F5 devices use a 'Transactions Per Second' (TPS) license to control the amount of SSL processing the device can handle. The log entry SSL transaction (TPS) rate limit reached is a clear indicator that the traffic volume has exceeded the licensed capacity. When determining the necessary license level, it is important to know that F5 primarily licenses and limits the 'Client-side' SSL TPS---which represents the encrypted connections between the users and the virtual servers. In this specific scenario, the peak demand reached 1200 client-side transactions per second. Although there were also 800 server-side transactions (re-encryption from the BIG-IP to the pool), these typically do not count against the primary TPS license limit in the same manner. Therefore, to ensure that the virtual server works as expected during peak load, the administrator must upgrade the license to at least 1200 TPS. This troubleshooting process links system log errors to license-enforced resource constraints.

Comprehensive and Detailed 150 to 250 Words Explanation From BIG-IP Administration, Support, and Troubleshooting Documents:

A QKView file is the primary diagnostic support bundle used by F5 Support to troubleshoot BIG-IP system issues. It contains comprehensive system information, including running configuration, licensing details, module provisioning, hardware status, software versions, log files, statistics, and the output of numerous diagnostic commands. Generating a QKView is a standard and recommended first step when investigating performance problems, configuration issues, or when opening a support case with F5.

In the BIG-IP Configuration Utility (GUI), the correct and supported location to generate a QKView is System > Support. This menu is specifically designed for support and troubleshooting operations. From this section, administrators can generate a QKView file, monitor its creation progress, download it locally, or upload it directly to F5 iHealth for automated analysis. This workflow is clearly documented in BIG-IP Administration and Support guides and aligns with F5 best practices.

The other menu options are not appropriate:

System > Configuration is used for system-wide settings such as DNS, NTP, and device identity.

System > Archive is used to create UCS backup files, which are configuration backups, not diagnostic bundles.

System > Logs is used only for viewing system logs, not generating support files.

Therefore, System > Support is the correct and only valid answer.

Comprehensive and Detailed Explanation From BIG-IP Administration Support and Troubleshooting documents: When troubleshooting intermittent connection resets on a 'busy' Virtual Server, the administrator must examine the configured thresholds62. A 'Connection Limit' is a hard cap on the number of concurrent connections a Virtual Server or pool member can handle63. If this limit is set too low, the BIG-IP will reset any new connection attempts once the threshold is reached64. The key indicator in this scenario is that the problem only affects 'some users' and happens when the server is 'busy,' suggesting that the system is hitting a capacity ceiling rather than suffering from a persistent configuration error65. Unlike a missing SSL profile, which would likely cause all connections to fail, or a 'Connection Rate Limit,' which throttles how fast connections arrive, a 'Connection Limit' focuses on the total volume66. Identifying this as the cause requires reviewing the Virtual Server's statistics to see if the 'Current Connections' count is consistently peaking at the configured limit value.

In the BIG-IP Configuration Utility, the status icon (shape and color) provides immediate feedback on why a virtual server is not working as expected81. A 'Red Diamond' indicates that the object is 'Offline' and unavailable to process traffic82. For a virtual server, this specific status typically means it has inherited an offline state from its mandatory backend resources8383. If all pool members associated with the virtual server have failed their health monitors, the virtual server will transition to a red diamond status because it has no healthy destination for incoming requests. This is distinct from a 'Black Circle,' which would indicate the virtual server has been manually 'Disabled' by an administrator85858585. To troubleshoot a red diamond, the administrator must examine the associated pool and its members to determine why the health monitors are failing (e.g., server crashes, network path failures, or incorrect monitor strings). Resolving the health check failures on the pool members will return the virtual server to an 'Available' (Green) status.

To collect application-layer details such as HTTP status codes (200, 404, 500, etc.) and HTTP methods (GET, POST, PUT, DELETE), the BIG-IP system must use a profile designed for traffic visibility and reporting rather than basic traffic handling. The Analytics profile (Option C) is the correct choice because it is specifically designed to collect, store, and present detailed statistics about HTTP and TCP traffic passing through a virtual server.

When an Analytics profile is attached to a virtual server, BIG-IP can record metrics such as HTTP response codes, request methods, URI paths, latency, throughput, and client-side/server-side performance data. These statistics are then accessible through the BIG-IP GUI under Statistics Analytics, allowing administrators to validate application behavior and troubleshoot performance or functional issues.

The HTTP profile (Option B) enables HTTP protocol awareness and features like header insertion and compression, but it does not provide historical or statistical reporting of HTTP methods and response codes. Request Adapt (Option A) is used for ICAP-based content adaptation, not visibility. Statistics (Option D) is not a standalone profile and does not provide HTTP-level insight.

Therefore, the Analytics profile is the only default profile that fulfills this requirement.