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List of Supported Transceiver Modules: Difference between revisions
List of Supported Transceiver Modules (view source)
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| QSFP28 || Cisco QSFP-100G-SM-SR || Fiber (LR4 lite) || does '''NOT''' work | | QSFP28 || Cisco QSFP-100G-SM-SR || Fiber (LR4 lite) || does '''NOT''' work | ||
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== Link status issues with different network equipment == | |||
=== Problem: 1G link is not coming up with 1G/10G SFP+ fiber modules === | |||
There is a known incompatibility with our 1G/10G SFP+ fiber modules when used with some Cisco equipment, such as a Cisco Nexus or Catalyst switch with 1G connectivity. | |||
The solution is as follows: | |||
* Disable auto-negotiation for the Cisco switch port which is connected to the Allegro device. | |||
* Manually set speed to 1G for the Cisco switch port | |||
Example configuration for Nexus: | |||
configure terminal | |||
interface ethernet x/yy | |||
speed 1000 | |||
no negotiate auto | |||
Actual commands depends on the Cisco model. Alternative commands are: | |||
speed nonegotiates | |||
set port speed 1000 | |||
Combinations known to work for 1G connectivity: | |||
* Our 1G/10G SFP+ SR module in an Allegro SFP port (article number 700) | |||
* Cisco GLC-SX-MMD in a Cisco switch | |||
* Cisco switch settings applied as described above | |||