I have build a NAS in an 1HE server.
Now i want to connect up to 4 Different machines to this NAS. Because of reduction in power requirement, i wanted to use a direct connection, so i do not have to run a separate 10G switch.
So my question is:
Can i accomplish that with a QSFP+ Card, in any mode (IB, ETH, whatnot)
I have searched the forum:
https://forums.servethehome.com/ind...a-qsfp-to-4xsfp-to-connectx2.4903/#post-41471
And the answer: "No, the 4->1 cables are designed to connect between switches or link the card to 4 ports on the same switch to get 40Gbps. What you don't get are 4 Ethernet devices out of the cable."
So for switches in a stack (one logical switch across multiple chassis) this would be possible?
If so, from my understanding, it is a "Software / Firmware" limitation of an qsfp+ card not to be able to serve 4 x 10 Gig SFP+ connections.
I do not understand the usecase of a 1 -> 4 splittercable, because if the qsfp+ card can link with a 4x 10G switch, the switch must have a lagg for those 4 ports to uplink to the qsfp+ device.
But then, if the switch does simple link aggregation, so must the qsfp+ card do. And if it does, it must also be possible to link to 4 different sfp+ devices.
Can somebody please clarify this for me!
Now i want to connect up to 4 Different machines to this NAS. Because of reduction in power requirement, i wanted to use a direct connection, so i do not have to run a separate 10G switch.
So my question is:
Can i accomplish that with a QSFP+ Card, in any mode (IB, ETH, whatnot)
I have searched the forum:
https://forums.servethehome.com/ind...a-qsfp-to-4xsfp-to-connectx2.4903/#post-41471
And the answer: "No, the 4->1 cables are designed to connect between switches or link the card to 4 ports on the same switch to get 40Gbps. What you don't get are 4 Ethernet devices out of the cable."
So for switches in a stack (one logical switch across multiple chassis) this would be possible?
If so, from my understanding, it is a "Software / Firmware" limitation of an qsfp+ card not to be able to serve 4 x 10 Gig SFP+ connections.
I do not understand the usecase of a 1 -> 4 splittercable, because if the qsfp+ card can link with a 4x 10G switch, the switch must have a lagg for those 4 ports to uplink to the qsfp+ device.
But then, if the switch does simple link aggregation, so must the qsfp+ card do. And if it does, it must also be possible to link to 4 different sfp+ devices.
Can somebody please clarify this for me!