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FAQ
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Allied Telesis SFP+ in stack ports

Posted at January 31, 2025 in by
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How to fix “Only ATI qualified modules are supported in this port” error on Allied Telesis?

Allied Telesis, like many network equipment manufacturers, designs its devices to operate optimally with transceivers that meet specific compatibility and performance standards. While the company offers a range of transceivers tailored for their products, third-party transceivers are not restricted and can also be used for optimal performance.

Nevertheless, Allied Telesis switches generally accept third-party transceivers in standard ports without issues. However, when it comes to stacking ports, there are specific considerations:

  • Stacking Ports Configuration: In models like the AT-x510DP series, certain SFP+ slots are designated for stacking purposes. For instance, in the AT-x510DP-28GTX switch, slots 27 and 28 are configured as stacking ports by default. These slots are optimized for stacking transceivers and may not support standard SFP or SFP+ transceivers unless the stacking feature is disabled.
  • Transceiver Compatibility: While third-party transceivers might function in standard ports, their performance in stacking ports isn’t guaranteed. To use transceivers in stack ports, it is mandatory to recode the transceivers.

Using 10Gbps SFP+ transceivers in Allied Telesis AT-XS916MXS stacking port, with standard compatibility, which is used on all Allied Telesis equipment (generic EEPROM), you may receive this type of error:

19:31:53 awplus Pluggable[594]: Pluggable 10GSFP20MS inserted into port1.0.15 19:31:53 awplus HSL[808]: ERROR: port1.0.15 – Only ATI qualified modules are supported in this port. Please remove.

In such case the transceivers needs special attention to code structure, which EDGE engineers are fully aware of. If this is the type of error you receive on our transceivers, be sure to contact our support team! They will help with the recoding process and ensure that the transceivers on your hand are fully compatible! Our list of Allied Telesis compatibles portfolio is available here.

FAQ

Why do I get 'Only ATI qualified modules are supported' error in my Allied Telesis switch?

This error appears when using non-ATI qualified SFP+ modules in stacking ports. Stacking ports (like ports 27-28 on AT-x510DP series) require specific module compatibility. Use ATI-certified modules or reconfigure ports as non-stacking.

Can I use third-party SFP+ modules in Allied Telesis switches?

Yes, third-party SFP+ modules work in standard (non-stacking) ports. However, stacking ports require ATI-qualified modules. Check your switch configuration and port designation before installing third-party modules.

How do I identify stacking ports on my Allied Telesis switch?

Stacking ports are typically high-numbered ports (e.g., ports 27-28 on AT-x510DP-28GTX). Check your switch documentation or use the command show system to identify stacking ports. These ports are optimized for switch stacking and have stricter module requirements.