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SFP/SFP+ Question (GC728X to AX6000)
Hi all,
From what I understand, the SFP+ slots in the GC728X do not permit auto-negotiation when using an AXM765 SFP+ module. My question is, does that limitation originate in the AXM765 modu...
OK let me explain. The AXM765 SFP+ transceiver can work at:
- 2.5Gbps when inserted in a 2.5Gbps SFP port (garage)
- 5Gbps when inserted in a 5Gbps SFP port (garage)
- 10Gbps (30 meters) when inserted in a 10Gbps SFP+ port (garage)
To my knowledge, there is no such switch today with 2.5Gbps or 5Gbps SFP ports (garages). So basically, the AXM765 can only be used in a 10Gbps SFP+ port, on a switch like the GC728X. You can connect another 10GBASE-T device (switch, or host) to the transceiver using CAT6A wiring up to 30 meters, at 10Gbps only.
The SFP+ port will not be capable of 2.5Gbps or 5Gbps, so AXM765 is "forcing" you to connect from a 10GBASE-T host at 10Gbps speed.
If you want, you can use a regular 1Gbps SFP transceiver like the AGM734. In that case, the SFP+ port will automatically revert back to 1Gbps (because it's detected as a purely 1Gbps transceiver), and you will be able to connect to your router using Cat5E or better, but at 1Gbps speed.
I hope this helps!
Regards,
OK let me explain. The AXM765 SFP+ transceiver can work at:
- 2.5Gbps when inserted in a 2.5Gbps SFP port (garage)
- 5Gbps when inserted in a 5Gbps SFP port (garage)
- 10Gbps (30 meters) when inserted in a 10Gbps SFP+ port (garage)
To my knowledge, there is no such switch today with 2.5Gbps or 5Gbps SFP ports (garages). So basically, the AXM765 can only be used in a 10Gbps SFP+ port, on a switch like the GC728X. You can connect another 10GBASE-T device (switch, or host) to the transceiver using CAT6A wiring up to 30 meters, at 10Gbps only.
The SFP+ port will not be capable of 2.5Gbps or 5Gbps, so AXM765 is "forcing" you to connect from a 10GBASE-T host at 10Gbps speed.
If you want, you can use a regular 1Gbps SFP transceiver like the AGM734. In that case, the SFP+ port will automatically revert back to 1Gbps (because it's detected as a purely 1Gbps transceiver), and you will be able to connect to your router using Cat5E or better, but at 1Gbps speed.
I hope this helps!
Regards,
The SFP+ port will not be capable of 2.5Gbps or 5Gbps, so AXM765 is "forcing" you to connect from a 10GBASE-T host at 10Gbps speed.
If you want, you can use a regular 1Gbps SFP transceiver like the AGM734. In that case, the SFP+ port will automatically revert back to 1Gbps (because it's detected as a purely 1Gbps transceiver), and you will be able to connect to your router using Cat5E or better, but at 1Gbps speed.
Thanks for the speedy responses, schumaku and LaurentMa !!
That definitely helps explain things; to make sure I understand, it would operate in either 1Gbps or 10Gbps (in a SFP+ garage), but there's no half-duplex/multi-rate capability. The resultant speed would be the lowest capable rate (1Gps or 10Gps) in the connection circuit. In this case, the best solution will probably be to set up an 802.3ad connection from the switch to the two aggregate-capable ports on the AX6000, theoretically allowing for a 2Gbps rate with appropriate cabling/environment settings. That also leaves the SFP+ garages free if I want to upgrade the NIC on our storage / client backup server. Plus, there's still the available SFP garages if I want to add an AGM734 for our in-line firewall/security appliance solution.
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