Hi misc,
I am trying to connect a 1GE SFP of type 1G SFP SX (Flexoptix S.8512.02.D) to a Power Edge R750 with a Connect Mellanox ConnectX-6 Lx.
The mellanox driver supports the corresponding mode. I think it should be "1000base-SGMII":
<snip> mcx5: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 lladdr a0:88:c2:33:d1:b7 index 8 priority 0 llprio 3 media: Ethernet autoselect status: no carrier supported media: media 1000base-SGMII media 1000base-KX media 10GbaseKR media 10GSFP+Cu media 10GbaseSR media 10GbaseLR media 25GbaseCR media 25GbaseKR media 25GbaseSR media autoselect <snap> The SFP is recognized correctly: <snip> fw# ifconfig mcx5 transceiver mcx5: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 lladdr a0:88:c2:33:d1:b7 index 8 priority 0 llprio 3 media: Ethernet autoselect status: no carrier transceiver: SFP LC, 850 nm, 270m OM1, 550m OM2 model: FLEXOPTIX S.8512.02.D rev A serial: F7AM3CB, date: 2023-06-13 voltage: 3.30 V, bias current: 9.70 mA temp: 40.60 C (low -10.00 C, high 85.00 C) tx: -6.30 dBm (low -12.00 dBm, high -1.00 dBm) rx: -8.40 dBm (low -20.00 dBm, high 1.00 dBm) <snap>However, the status remains in state "no carrier". It is interesting to note that the interface can obviously receive network packets:
<snip> tcpdump: listening on mcx5, link-type EN10MBMar 14 09:04:16.675476 802.1Q vid 1004 pri 6 CARPv2-advertise 36: vhid=1 advbase=1 advskew=0 demote=0 (DF) [tos 0x10] Mar 14 09:04:16.675476 802.1Q vid 1003 pri 6 CARPv2-advertise 36: vhid=1 advbase=1 advskew=0 demote=0 (DF) [tos 0x10]
... <snap>These network packets are sent from another system. This means that things seem to work in the receiving direction.
In the same system there are mellanox connectX-5 nics. The 1GE-SFP works flawlessly with it.
Regards, Joerg -- Dipl.-Ing. (FH) Joerg Streckfuss M.Sc. (Senior IT-Specialist) DFN-CERT Services GmbH, https://www.dfn-cert.de/, Phone +49 40 808077-555 Sitz / Register: Hamburg, AG Hamburg, HRB 88805, Ust-IdNr.: DE 232129737 Nagelsweg 41, 20097 Hamburg, Germany. CEO: Dr. Klaus-Peter Kossakowski
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