[j-nsp] LX SFP Question

[Stefan Fouant]

On Thu, Sep 24, 2009 at 5:35 PM, Paul Stewart <paul at paulstewart.org> wrote:

> Hi folks...
>
> Does anyone know the tolerance of the LH SFP's from Juniper?  We are trying
> to get an EX3200 switch configured and ready for production - have a case
> open at JTAC but haven't been able to resolve.  In fairness to the JTAC
> engineer, I haven't had a lot of time to troubleshoot except for performing
> a software upgrade which has been completed (9.4)
>
> The link is up/up from the EX3200 to a Cisco 6500 but the distance at the
> moment (while testing) is literally 15' or so.  In the Cisco world we have
> no problem on such short distances but wondering if something is different
> or causing a problem for the Juniper.
>
> We see up/up and at one point were seeing a MAC address but unable to
> access
> the Management VLAN on the switch (only VLAN configured at the moment).
> Since the software upgrade we cannot see a MAC address even which has me
> wondering about the connection running too hot....
>
> JTAC verified that the configuration is correct - Cisco TAC has verified
> that the IOS configuration is correct.
>

Did you try pulling up the optical transmit and receive dB windows from the
spec sheets?  That'd be the first thing I'd look into to determine if you
need to put in an attenuator.

-- 
Stefan Fouant