[c-nsp] SFP-10G-LRM in Nexus 5000

[Mike Hale]

Correct me if I'm wrong, but the LRM SFPs are designed to go over MMF,
not SMF.  Isn't that going to be a problem?

We're using some LRM SFPs between floors to a 5548, and they function
just fine.

On Mon, Sep 14, 2015 at 3:15 PM, Crist J. Clark
<cjc+cisco-nsp at pumpky.net> wrote:
> On Mon, Sep 14, 2015 at 10:45:58PM +0100, Nick Hilliard wrote:
>> On 14/09/2015 22:39, Crist J. Clark wrote:
>> > We are running all of this over SMF.
>>
>> why are you using LRM transceivers then?
>
> I am not exactly sure of the design decisions behind the choice to use LRM over
> SMF to orginally connect the distro to the core when the campus was built. But
> given that it was working, and we already had almost enough spare LRMs on hand
> to complete the project, It Seemed Like a Good Idea at the Time.
>
> We also have OM3 MMF between the buildings so replacing this all with SR is
> the main plan right now, but whatever the problem is with the LRM modules
> looks more like software/firmware than a problem with the fiber paths (the links
> always do eventually come up with good light readings and no errors), and we
> were just curious if anyone had seen this issue with 5ks and LRM before and
> found a way to deal with it.
> --
> Crist J. Clark
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