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

2015-09-17 Thread Crist J. Clark
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

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

2015-09-16 Thread Matthieu Michaud
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

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

2015-09-15 Thread Mike Hale
"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,

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

2015-09-15 Thread Crist J. Clark
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

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

2015-09-14 Thread Crist J. Clark
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

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

2015-09-14 Thread Crist J. Clark
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

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

2015-09-14 Thread Nick Hilliard
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

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

2015-09-14 Thread Mike Hale
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

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

2015-09-14 Thread 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 wrote: > On Mon, Sep 14,

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

2015-09-14 Thread Nick Hilliard
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

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

2015-09-14 Thread Andrew Miehs
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

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

2015-09-14 Thread Nick Hilliard
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 ___ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at

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

2015-09-14 Thread Crist J. Clark
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