> Warren Kumari > Sent: Wednesday, February 26, 2020 4:31 PM > > On Wed, Feb 26, 2020 at 11:20 AM Coy Hile <coy.h...@coyhile.com> wrote: > > > > On 2020-02-26 11:14, Randy Bush wrote: > > >> We use plenty of multi-mode, but only in the data centre, between > > >> our own kit, for racks within the same cage. > > > > > > so you have to stock both single and multi? hmmm > > > > > > randy > > > > I'd expect that from the ToR -> Servers would be MMF, but that other > > infrastructure cabling would be SMF. > > Even using aftermarket optics, putting single-mode transceivers in > > every server and access port would quickly become cost-prohibitive, > > would it not? > > Cisco GLC-SX-MM Compatible 1000BASE-SX SFP 850nm 550m DOM > Transceiver Module - $6.00 - https://www.fs.com/products/11774.html > Cisco SFP-GE-L Compatible 1000BASE-LX/LH SFP 1310nm 10km DOM > Transceiver Module - $7.00 - https://www.fs.com/products/12622.html > > Yup, it is $1.00 more for SM, and you need 2 per link, but unless you are > doing > *lots* that's likely not cost-prohibitive. The delta on 10G is a bit more > ($21 vs > $18), but still not crazy-pants territory... > Unfortunately I'm currently stuck with 40G breakout into 10G towards the floor switches, which is $39 vs $299 -hence my question regarding SMF vs MMF MPO/MTP for the risers. Alternatively killing a 40G port with single 10G.
adam
