Tried all of these things with multiple SFPs, ports, etc. Finally just gave up and bought a Cisco router.
On Friday, July 31, 2015, Faisal Imtiaz <[email protected]> wrote: > Hmm... this is rather strange... > > In future keep some of these troubleshooting tips in mind.. > > 1. You have to make sure that type of SFP & (Wavelength) Matches.. > i.e. MM --> MM SFM --> SMF , SMF can be 1310 or 1550 make sure > both sides match > 2. Make sure light is reaching both sides... > use a light meter (if you don't have one, consider buying one .. > approx $50 from Fiberstore.com) > if you don't have a light meter, you can use use a far side loop > back (simply connect the Rx side to Tx side on the far side) > you can use this method to test each side coming up individually. > 3. Make sure that if you are using SFP of correct ratings (i.e. 1gig in > the 1gig ports) Not all SFP+ (10G) will accept 1G SFP's. > 4. Make sure the Duplex Settings match on each side... for Cisco, it is > best to hard code each side. > 5. When using SMF SFP's, it is possible to over load the receiver, i.e. > getting too much light... and not have link.... in such cases it is ideal > to use a 'pad' or attenuator. This is the reason why it is important to > have a light meter... > > Having said that... I have yet to come across a situation where one SFP > will not connect to another SFP as long as all of the other above listed > reason are not the cause of the problem.. > > If you are worried about testing compatibility.... easiest thing to do is > use a fiber patch cord (LC-LC) to create yourself a loop back cable (you > can add a 3db attenuator if you like), plug in the SFP in your device, make > sure that the device will see the SFP, connect the loop back cable and the > link should come up... > > (if you need to make field attenuator... do some googling on how to wrap > fiber cable strand tightly around a #2 pencil to create one) > > :) > > > Faisal Imtiaz > Snappy Internet & Telecom > 7266 SW 48 Street > Miami, FL 33155 > Tel: 305 663 5518 x 232 > > Help-desk: (305)663-5518 Option 2 or Email: [email protected] > > ------------------------------ > > *From: *"Jason McKemie" <[email protected] > <javascript:_e(%7B%7D,'cvml','[email protected]');>> > *To: *[email protected] <javascript:_e(%7B%7D,'cvml','[email protected]');> > *Sent: *Thursday, July 30, 2015 11:43:43 PM > *Subject: *Re: [AFMUG] Tik - Cisco SFP > > I tried to get a couple mikrotiks to talk to a Cisco nexus switch at the > other end of some dark fiber. We couldn't get anything to work - showed as > up on my end, but down on the Cisco end. Wound up dropping a Cisco router > in place of the tik and it came right up. > > On Thursday, July 30, 2015, Tyler Treat <[email protected] > <javascript:_e(%7B%7D,'cvml','[email protected]');>> wrote: > >> Does anyone have a recommended SFP for going from a 2011 to a Cisco >> Switch? Anything special to be aware of? >> >> Thanks >> Tyler >> > >
