As per the User guide it says as below,
https://support.hpe.com/hpsc/doc/public/display?docId=a00017710en_us (Page no 29)
"
The 10GbE iSCSI ports are used in either of two capacities:
• To connect two storage systems through a switch for use of Remote Snap replication.
• For attachment to 10GbE iSCSI hosts directly, or through a switch used for the 10GbE iSCSI traffic.
"
As per the Quickspec it says,
https://h20195.www2.hpe.com/v2/getdocument.aspx?docname=a00008276enw (Page No 12)
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Fibre Channel results were measured using 16 Gb FC Host Bus Adapters. SAS results were measured using 12 Gb SAS Host Bus Adapters. 10 GbE iSCSI results were measured using 10GbE iSCSI Host Bus Adapters. 1 GbE iSCSI results were measured using 1GbE network interface controllers (NICs). Hosts were directly attached to the HPE MSA 2050 array
"
So all the official information mentioned for 10 GbE only.
10 GbE Controller host ports may work with 1 GbE SAN Switch but this is not recommended or supported so we shouldn't use the same. HPE may not provide support for any issue arise for this type of setup in future.
Hope this helps!
Regards
Subhajit
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