On 8/29/13 6:08 AM, Saku Ytti wrote: > How do people deal with situation where you need <=48 SFP/SFP+ ports, but > you occasionally need one or two cu 10/100 ports? arista 7050s support 100 Mb/s on their copper sfp I have leveraged that, if you can break out the 40Gb/s ports you have as many as 64 ports of 10Gb/s. there are other switches that I've seen do this but they're not common.
My problem is mostly around PDU/CDU management, in racks that otherwise would be 10Gb/s only and in general I've addressed it with dedicated switches that support many of these devices rather than just two. > For some reason it's becoming quite rare for SFP port to natively support > 10M and 100M rates. > > Technically obviously solution to me would be subrate SFP, which presents > itself as 1GE to host, offering 100M or 10M to client. This would obviously > break QoS at the host as host would still think it's 1GE and SFP itself > would need to drop+buffer. But for my applications it would be fine, the > 10M or 100M ports are typical some MGMT access interfaces. > I can't imagine such SFP being complex or expensive, considering we have E1 > over IP in a SFP, which includes control-plane and forwarding-plane inside > SFP form-factor > > Is this demand peculiar? Could I source such SFP somewhere by showing there > is demand? > > Putting 2 port switches or fibre converters with external PSU just to > support few ports seem dirty.
