Warren Kumari Sent: Wednesday, February 26, 2020 4:31 PM
On Wed, Feb 26, 2020 at 11:20 AM Coy Hile <coy.hile@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