We have got some old 62.5um single-mode fiber links in our building. Network people told me, that Cisco 10GBASE-LRM with Cisco mode conditioning patch cables works fine on those cables and provides a stable 10GBit link.
Now we need to add a new direct link between servers over the same cable, and were considering Intel cards with Intel transceivers. Apparently 10GBASE-SR should not work over this cable (total link length is over 200m). Do I understand correctly that 10GBASE-LR transceivers should work just fine with these cable infrastructure? Which kind of patch cables should we use, single-mode patch cables, multi-mode patch cables, or mode conditioning patch cables?
Best Answer
LR connections are single mode. You'll need mode conditioning patch cables on both sides but likely a different type than was in use for your LRM (which wants multimode, but with a smaller core).