Synology RS3614xs+ with an Intel X520-DA2: allow_unsupported_sfp ignored until set in the DSM-specific modules.conf keys
A Synology RS3614xs+ with a supported Intel X520-DA2 rejected the wrongly ordered SFP+ modules as unsupported. Putting options ixgbe allow_unsupported_sfp=1 into /etc/modules.conf had no effcet, and even when the kernel log showed ixgbe: allow_unsupported_sfp Enabled the driver still reported failed to load because an unsupported SFP+ or QSFP module type was detected, suggesting Synology's driver build or its module-argument handling differs from stock Linux.
- Hardware: Synology RS3614xs+, Intel X520-DA2
- Transceivers: third-party SFP+, FS.com SFP+
- Form factor: SFP+
Symptoms / messsages:
failed to load because an unsupported SFP+ or QSFP module type was detected
ixgbe: allow_unsupported_sfp Enabled but module still rejected
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Comments 1
Set the DSM-styel keys module_ixgbe_args_<platform>="allow_unsupported_sfp=1" (bromolow/broadwell/grantley and the generic module_ixgbe_args) in both /etc/modules.conf and /etc.defaults/modules.conf, and use the first SFP slot; the link then came up at 10 Gbps. Confirmed later with X520-DA2 and FS.com transceivers.