FWIW, 2.5g optics came from the TDM world, typically used for OC-48 ports, and yes all of the major router platforms support it (not necessarily under ethernet). Then because of this, there were a lot of 'waves' fiber channels available, as in LH transport, for 2.5g. Today due to cost, ROI and popularity 2.5g is fading into the background in favor of SFP+.
Getting back to, arm chair quarterbacking the Trango product, I can think of a couple of reasons why they might have choosen 2.5g SFP module slot, considinger 1G/2.5G modules use the same Slot, chips etc, and SFP+ are not necessarily 1G/10G , also realizing their background with TDM it is quite possible that this product has a shared heritage with another of their TDM radio, or at some point in time (it may possibly be even now) it was intended as wireless OC48 transport. :) Faisal Imtiaz Snappy Internet & Telecom 7266 SW 48 Street Miami, FL 33155 Tel: 305 663 5518 x 232 Help-desk: (305)663-5518 Option 2 or Email: [email protected] > From: "Eric Kuhnke" <[email protected]> > To: [email protected] > Sent: Monday, June 13, 2016 9:49:53 PM > Subject: Re: [AFMUG] Trango StrataPro Xi > Yeah, sure, if your design goal is to make your L3 backbone harder to > troubleshoot and more failure prone in chains of non-redundant devices. I > suppose I could put a 48 port 1000BaseT switch in front of each router and put > the microwave PTP linked OSPF /30 BB interfaces each on their own vlan, with > one 10GbE from router to switch, but I'd be silly to do so. > On Jun 13, 2016 6:26 PM, "Josh Baird" < [email protected] > wrote: >> There -could- be a router doing L3 behind the switch. It's not that uncommon, >> right? >> On Mon, Jun 13, 2016 at 9:17 PM, Eric Kuhnke < [email protected] > wrote: >>> Switch? If people do layer 2 over $6,000+ microwave for backbone links >>> between >>> two POPs, that is a really bad idea in my opinion. WISPs love to build >>> layer 2 >>> clusterfucks because a lot of small ones start with basically no OSPF or BGP >>> knowledge. >>> Show me a real router platform that is in common use that supports 2.5 Gbps >>> SFP >>> (not SFP+ on a rate limited port). >>> On Jun 11, 2016 10:29 AM, "Jon Auer" < [email protected] > wrote: >>>> Adtran NetVanta 1544 Ethernet switches (24xGigE, 4xSFP) have been 2.5G >>>> capable >>>> since 2009. >>>> On Thu, Jun 9, 2016 at 4:17 PM, Eric Kuhnke < [email protected] > >>>> wrote: >>>>> There are such things as 2.5 Gbps SFPs used for fiber channel storage >>>>> array >>>>> applications (example: Cisco MDS9000) but you will not see them used in >>>>> ethernet speaking routers/switches. >>>>> On Thu, Jun 9, 2016 at 2:10 PM, Erich Kaiser < >>>>> [email protected] > >>>>> wrote: >>>>>> Check with John, but I thought he said something about a 2.5Gbps SFP, >>>>>> not sure >>>>>> why they did not go 10G.... >>>>>> Erich Kaiser >>>>>> North Central Tower >>>>>> [email protected] >>>>>> Office: 630-621-4804 >>>>>> Cell: 630-777-9291 >>>>>> On Thu, Jun 9, 2016 at 12:41 PM, Cassidy B. Larson < [email protected] > >>>>>> wrote: >>>>>>> So I’m checking out the new Trango StrataPro data sheets… The Xi model >>>>>>> appears >>>>>>> to do 4Gbps full-duplex.. but no 10G SFP+.. So I’d have to use all >>>>>>> three SFPs, >>>>>>> and one copper gig to get it? >>>>>>> Other notes: it appears they’re keying it up.. so you get to pay extra >>>>>>> to unlock >>>>>>> capacity to 1100Mbps and again to unlock max capacity to 2200Mbps. >>>>>>> Oh and if you want AES-256, you get to pay again. The 1MB packet >>>>>>> buffer.. seems >>>>>>> low. >>>>>>> Anybody else have any thoughts? Anybody got one yet? >>>>>>> -c
