ServSwitch Agility and Agility Dual

Appendix B. Troubleshooting

Problem: The video image of the ServSwitch Agility receiver shows horizontal lines across the screen.

This issue is known as Blinding because the resulting video image looks as though you’re viewing it through a venetian blind.

When video is transmitted by ServSwitch Agility units, the various lines of each screen are divided up and transmitted as separate data packets. If the reception of those packets is disturbed, then blinding is caused. The lines are displayed in place of the missing video data packets.

There are several possible causes for the loss of data packets:

•Incorrect switch configuration. The problem could be caused by multicast flooding, which causes unnecessary network traffic.

This is what IGMP snooping is designed to combat, however, there can be numerous causes of the flooding.

•Speed/memory bandwidth issues within one or more switches. The speed and capabilities of different switch models varies greatly. If a switch cannot maintain pace with the quantity of data being sent through it, then it will inevitably start dropping packets.

•One or more ServSwitch Agility units may be outputting Jumbo frames due to the video resolution (2048 horizontal pixels) being used. If jumbo frames are output by a ServSwitch Agility unit, but the network switches have not been configured to use jumbo frames, the switches will attempt to break the large packets down into standard packets. This process introduces a cer- tain latency and could be a cause for dropped packets.

•One or more ServSwitch Agility units may be using an old firmware version. Firmware versions prior to v2.1 exhibited an issue with the timing of IGMP join and leave commands that caused multicast flooding in certain configurations.

Remedies:

•Ensure that IGMP snooping is enabled on all switches within the subnet.

•Where each ServSwitch Agility unit is connected as the sole device on a port connection to a switch, enable IGMP Fast-Leave (aka Immediate Leave) to reduce unnecessary processing on each switch.

•Check the video resolution(s) being fed into the ServSwitch Agility transmitters. If resolutions using 2048 horizontal pixels are unavoidable then ensure that Jumbo frames are enabled on all switches.

•Check the forwarding mode on the switches. If Store and forward is being used, try selecting Cut-throughas this mode causes reduced latency on lesser switch designs.

•Ensure that one device within the subnet is correctly configured as an IGMP Querier, usually a layer 3 switch or multicast rout- er.

•Ensure that the firmware in every ServSwitch Agility unit is version 2.1 or greater.

•Try adjusting the transmitter settings on each ServSwitch Agility to make the output data stream as efficient as possible. See

Agility transmitter video settings for details.

Problem: The audio output of the ServSwitch Agility receiver sounds like a scratched record.

This issue is called Audio crackle and is a symptom of the same problem that produces blinding (see previous page). The issue is related to missing data packets.

Remedies:

As per blinding discussed above.

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Black Box ACR1000A-R, ACR1000A-T, ACR1002A-R, ACR1002A-T, ServSwitch AgilityTM and Agility DualTM manual Remedies
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ACR1000A, ACR1000A-R, ACR1002A, ACR1002A-T, ACR1002A-R specifications

The Black Box ACR1000A-T, ServSwitch AgilityTM, Agility DualTM, ACR1002A-R, ACR1002A-T, and ACR1002A are advanced solutions designed to optimize switching and management capabilities in complex IT environments. These devices cater to various needs, primarily focusing on KVM (Keyboard, Video, Mouse) switching and user-friendly operations, making them invaluable in data centers, server rooms, and large corporate infrastructures.

The Black Box ACR1000A-T is known for its robust functionality and versatility. It supports video resolutions up to 4K, ensuring high-quality output for a range of applications. This model utilizes dual-channel audio support, enhancing multimedia experiences, while its convenient USB connectivity allows seamless integration with modern peripherals. The ACR1000A-T is designed with a user-friendly interface, simplifying multi-computer management by enabling users to effortlessly switch between systems with a push of a button.

The ServSwitch AgilityTM series elevates performance with efficient switching and extended connectivity options. Designed for high-resolution support, it ensures minimal latency in video transmission. With features such as USB and audio handling, the AgilityTM series provides an inclusive multi-functional experience, allowing users to control multiple machines from a single workstation effortlessly. The enhanced firmware updates ensure that the AgilityTM series remains on the cutting edge of technology, adapting to evolving user demands.

For environments requiring dual-access capabilities, the Agility DualTM provides a unique solution. It enables two users to share control over two different systems simultaneously, offering great flexibility and collaboration in diverse workflows. This innovative approach enhances productivity by allowing one user to work on one system while the other manages a different task, all without needing to switch setups.

The ACR1002A-R, ACR1002A-T, and ACR1002A devices focus on scalability and performance. These models come equipped with comprehensive management features, including remote access capabilities and support for various video resolutions. Ideal for IT administrators, these devices streamline operations, simplifying maintenance and offering excellent reliability.

In summary, the Black Box ACR1000A-T, ServSwitch AgilityTM, Agility DualTM, ACR1002A-R, ACR1002A-T, and ACR1002A represent cutting-edge advancements in KVM technology. With their combination of high-resolution support, user-friendly interfaces, and scalability, they are essential tools in managing multiple computing environments efficiently. These devices not only enhance productivity but also align with the evolving needs of businesses in today's fast-paced digital landscape.
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