So it took a while, but someone hit on it, and I wanted to emphasize
the point in case some other poor soul runs into this issue.
10Gbase-LRM modules are not supported on Nexus 5000 platforms.
The story I got is that the Nexus 5000s lack the Electronic Dispersion
Compensation (EDC) which is
Hello,
Some LRM run on both SM and MM including Cisco's. At $JOB we do use
10G-LRM a lot.
It's the predominent transciever because estate standards says "SM
EVERYWHERE !@#!", we buy only Cisco brands and LR is 4 times the price
of an LRM. It was removed from Nexus compatibility matrix in recent
"No."
I stand corrected. ;)
"What's on the opposite side of the 5548s?"
They are up and running right now on a 3750X and a 2960S. I have a
vague memory of having them in some servers in the past as well, but
I'm not seeing any of those right at this moment.
On Tue, Sep 15, 2015 at 9:47 AM,
On Mon, Sep 14, 2015 at 03:21:27PM -0700, Mike Hale 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?
No. As someone else already pointed out, Cisco says you can run LRM over
SMF for 300m, which is actually longer than
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
On Mon, Sep 14, 2015 at 09:50:10PM +0100, Nick Hilliard wrote:
> On 14/09/2015 21:03, Crist J. Clark wrote:
> > We're obviously looking at getting new optics, but we're wondering
> > why what we have works and if it still isn't possible to get
> > the Nexus 5548 and Cat 6880X links to behave
On 14/09/2015 21:03, Crist J. Clark wrote:
> We're obviously looking at getting new optics, but we're wondering
> why what we have works and if it still isn't possible to get
> the Nexus 5548 and Cat 6880X links to behave better.
these symptoms sound like electronic dispersion compensation
The SFP-10G-LR are designed for SMF.
On Mon, Sep 14, 2015 at 3:21 PM, Mike Hale 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
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
wrote:
> On Mon, Sep 14,
On 14/09/2015 23:15, Crist J. Clark wrote:
> 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
LRM works on SM. I have used them a lot on cat 4500s but we mainly but not
only used them for OM1 cable.
Cisco link below:
http://www.cisco.com/c/en/us/products/collateral/interfaces-modules/transceiver-modules/data_sheet_c78-455693.html
Cisco SFP-10G-LRM Module
The Cisco 10GBASE-LRM Module
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?
Nick
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On our campus, we have a pair of Nexus 5596 cores connected to
5548s at the distro layer using SFP-10G-LRM optics. We ran into
some of the layer 3 limitations inherent in the 5596s and are
moving to a Catalyst 6880X core. To be safe, we just copied the
existing design and put in SFP-10G-LRM optics
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