Providing a convincing case

If you believe that you have successfully hit on the right theory, and have isolated what appears to be a good candidate for the root cause of what is going wrong, gather as much evidence as you can to support the theory.

Concrete piece of advice #6: If you find a sequence of actions that make the problem happen, capture the full sequence (and the evidence that the problem has happened) multiple (more than 2) times if possible.

Often certain pre-conditions are pertinent to the circumstances in which the problem will or won't occur—'the problem still occurs even if port 2 is not connected'; 'if the ARP entry has been cleared before the route ages out, the problem does not happen' etc. It is important to capture the output to illustrate these pre-conditions—it might be very clear to you that port 2 is definitely disconnected, but the person analysing the captures after you might not truly believe that unless they see the output of the show port command that shows port 2 to be DOWN.

Concrete piece of advice #7: Capture as much evidence as possible to support any assertions you make about the circumstances in which you see the problem happen.

Annotating afterwards

Before you send your capture off to the next layer of support or anyone else, you will want to give them as much guidance as possible as to how to extract the significant pieces of information from your capture. This can be achieved by going through the capture and putting in further comments to spell out more clearly what is happening than you were able to do with the quick comments you typed in while on-site. Or, you might want to copy the really important parts out of the capture and paste them into a separate file, to succinctly illustrate the core of the problem.

Concrete piece of advice #8: Some post-processing of the capture file can save a lot of time and effort for anyone who is analysing it after you.

But, even if you copy the pertinent pieces out of the capture, still send the rest of the capture file anyway, there could be significant gems of information in there that you weren't aware of.

Concrete piece of advice #9: If possible, always send everything that you captured—too much information is always better than too little.

USA Headquarters 19800 North Creek Parkway Suite 200 Bothell WA 98011 USA T: +1 800 424 4284 F: +1 425 481 3895

European Headquarters Via Motta 24 6830 Chiasso Switzerland T: +41 91 69769.00 F: +41 91 69769.11

Asia-Pacific Headquarters 11 Tai Seng Link Singapore 534182 T: +65 6383 3832 F: +65 6383 3830

www.alliedtelesis.com

© 2007 Allied Telesis Inc. All rights reserved. Information in this document is subject to change without notice. All company names, logos, and product designs that are trademarks or registered trademarks are the property of their respective owners.

C613-16028-00 REV B

AT-8900 Series specifications

The Allied Telesis AT-8900 Series represents a cutting-edge solution in the realm of networking, designed to meet the demands of modern enterprises that require high-performance, reliable, and flexible networking options. This series encompasses a range of intelligent Layer 2 managed switches that cater to various applications, from small offices to large data center environments, offering a robust blend of performance, features, and advanced technologies.

One of the key features of the AT-8900 Series is its comprehensive support for Layer 2 switching protocols. These switches enable efficient data handling and traffic management, ensuring that businesses can maintain high data throughput without sacrificing reliability. This is particularly important for organizations that depend on stable network performance for mission-critical applications.

Another significant characteristic of the AT-8900 Series is its advanced Quality of Service (QoS) capabilities. With multiple queue scheduling options, the switches can prioritize essential data traffic intelligently. This ensures that latency-sensitive applications, such as VoIP and video conferencing, receive the bandwidth they require for optimal performance. The QoS features help to create a seamless user experience across various devices and applications.

Additionally, the AT-8900 Series incorporates cutting-edge security measures that are vital in today’s increasingly sophisticated network environment. Features such as IEEE 802.1X port-based authentication, dynamic VLAN assignment, and secure management protocols contribute to the prevention of unauthorized access. These security protocols give network administrators the tools they need to protect sensitive data and maintain compliance with regulatory standards.

The AT-8900 Series switches also support stacking technology, allowing multiple units to operate as a single logical switch. This simplifies management and increases redundancy, ensuring that network uptime is maximized. Stacking enables easy scalability, allowing organizations to expand their network infrastructure seamlessly as their needs grow.

Energy efficiency is another hallmark of the AT-8900 Series. These switches boast low power consumption modes that help organizations reduce their carbon footprint while saving on energy costs. With features such as Energy Efficient Ethernet (EEE), the AT-8900 Series aligns with modern sustainability initiatives.

In conclusion, the Allied Telesis AT-8900 Series is a powerful and versatile choice for organizations seeking advanced network solutions. With its rich feature set, robust security, efficient traffic management, and scalability, this series stands out as an ideal option for enterprises looking to enhance their network infrastructure in a rapidly evolving digital landscape.

Allied Telesis AT-8900 Series manual Providing a convincing case, Annotating afterwards

Models: AT-8900 Series