Also SFP28 ports are backwards compatible with SFP+ optics. On Fri, Aug 6, 2021 at 9:12 PM Joel Wirāmu Pauling <j...@aenertia.net> wrote:
> SFP28 (25gbit) is the way to go for density on x86 as it matches CPU > bound bus architecture well. QSFP28 to 4*SFP28 offers the best price per > port density both for interconnects (the DAC TwinAX 'squid' cables are > cheap as chips) > > Network Stack Throughput through CPU on modern Intel x86 _64 even on perf > tuned OS's tops out around 40Gbit locally so 50gbit ports don't make a lot > of sence bar for specific use cases. Going faster means SmartNIC offloads, > which are fine for certain use cases or if you just want to push packets > without doing anything with them (i.e NIC to NVME etc, or switching). > > On Fri, Aug 6, 2021 at 7:33 PM Stuart Henderson <s...@spacehopper.org> > wrote: > >> On 2021-08-06, ha...@sdf.org <ha...@sdf.org> wrote: >> >> Hi folks! >> >> >> >> I wonder if OBSD supports 50Gbe network cards. And what is the cable >> >> standard to support such data transfers ? >> >> >> >> Thanks. >> >> >> >> -- >> >> The lion and the tiger may be more powerful, but the wolves do not >> perform >> >> in the circus >> > >> > $ apropos 50gb >> > bnxt(4) - Broadcom NetXtreme-C/E 10/25/40/50Gb Ethernet device >> > >> > https://man.openbsd.org/bnxt.4 >> > >> > >> >> Cable is usually single-mode fibre (duplex or simplex depending on which >> QSFP28 you use) or twinax DACs. There might also be some using multimode >> MTP cables but if there are, they're less common. >> >> Don't expect to get anywhere close to line rate with OpenBSD. >> >> >>
