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

[Mike Hale]

The SFP-10G-LR are designed for SMF.

On Mon, Sep 14, 2015 at 3:21 PM, Mike Hale <eyeronic.design at gmail.com> wrote:
> 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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>
>
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