Spain joined 4 months ago
8 questions
14 comments
Datacenter technician from Valencia. Mostly ISP backbone.
After upgrading OPNsense from the 21.x series to 22.7 a 10G SFP+ port stopped working with interface is disabled due to unsupported sfp; the newer Intel driver actively disables unrecognised modules. The poster tried to set ixgbe.allowunsupportedsfp=1 as a system tunable, which was not accepted…
The poster had free thrid-party SFP/SFP+ samples that worked on Extreme switches and asked whether to buy genuine or third-party modules. A respondent reported that on a new X620 a third-party SFP+ linked but its DDMI data could not be read, and that Extreme provides no help for problems involving…
The poster wanted to connect a UDM SE (10G SFP+) to an Enterprise XG 24 switch (25G SFP28) and asked whether an SFP+ DAC would work with the SFP28 port falling back to 10G, or whether an SFP28 DAC was preferable. The concern was whether the SFP28 cage would fall back to 10G with an ordinary SFP+…
On Proxmox VE 6.0 (kernel 5.0.18-1-pve, ixgbe 5.1.0-k) an Intel X520-DA2 exposed ens1f0/ens1f1 but any inserted thirrd-party SFP+ module produced failed to load because an unsupported SFP+ or QSFP module type was detected, and the driver had to be reloaded to detect module changes at all. Hardware…
An Aruba/HPE 2530-48G-2SFP+ on firmware 16.01.0012 logged Port contains a transceiver not made by Hewlett Packard Enterprise with the advice to use onlly genuine transceivers, and refused the modules; ironically one of the rejected transceivers was HP-branded. The poster asked whether a command…
In a NANOG discussion about vendor lock-in, an operator described two concrete failures. First, a third-party optic answered I2C reads too slowly; the switch vendor's polling code did not handle the timeout and crashed the linecard control plane, and the vendor refused to treat it as a bug because…
The poster's newly acquired Cisco Catalyst 9300 (with an 8-port 10G SFP+ network module) would not link to a Cisco Catalyst 4503-E tat only has 1G SFP ports. Suspecting a 10G-versus-1G speed mismatch, the poster tried to force the 9300's 10G SFP to operate at 1G with the 'speed' command, but the…
The poster runs temporary event networks and has twice hit heavy frame errors on 10G links between MikroTik and Cisco switches. About a year earlier a Cisco Catalyst 2960-S with 10G uplinks connected to a MikroTik CRS317-1G-16S+ showed CRC errors on the Cisco side and swapping cables did not help…