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10Gbit question

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  • 1.  10Gbit question

    Posted Jul 26, 2021 11:17 AM

    Quick question (I hope)...

    How would you normally go about connecting something like the Aruba 2540 24G 4SFP+ 1/10GbE (JL354A) or 2540 48G PoE+ 4SFP+ 1/10GbE (JL357A) switch to a server with a 10Gbit ethernet card so we get 10Gbit transfer between the switch and server?

    Presumably we'd need to use one (or more) of the SFP+ ports on the switch but what kind of transceivers and cables would I need to use to ensure we get 10Gbit between switch and server?

    Thank you and I'm sorry for the thickness of the question...



  • 2.  RE: 10Gbit question

    MVP GURU
    Posted Jul 26, 2021 02:26 PM
    Hello Matthew,

    an approach would be: use a Short Range (SR) MM optical SFP+ Transceiver supported by the Aruba 2540 on your switch side (such as J9150A or J9150D SKUs), a OM3 or OM4 fiber optic cable (patch) in between and an equivalent Short Range (SR) MM optical SFP+ Transceiver supported by your specific Server's NIC on your Server side.

    The above approach follows the rule that see each side using its supported options and the cable interconnecting both ends is the agnostic media in between. That's valid for basically any length under 300 meters. Have a look here for supported options.

    Generally one would then aggregate single physical links - in ArubaOS-Switch this is "Port Trunking" - with LACP (two or more SFP+ links together will form a new 10G+10G aggregation, as example) but this is strictly relevant and related to your port(s) availability and resiliency/throughput requirements. If you can (and Server's NIC has more than one port or you have two single/dual port's NICs on your Server), do it.

    An alternative deployment would use DAC cables (instead of SFP+ <--> patch <--> SFP+ suggested above) can eventually be evaluated BUT it needs first to be certified (and this generally happens when Switch and Servers belong to the same vendor...like the HPE case where on one end you have HPE Aruba or HPE switches and on the other end you have HPE ProLiant servers). Have a look here.

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    Davide Poletto
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    Original Message